Cobalt-nickel alloy · UNS R30035 · MP35N · W.Nr. 2.4999 · 35Co-35Ni-20Cr-10Mo
UNS R30035 Forgings
Seamless rolled rings, discs, shafts, round bars, flanges, sleeves and valve components, open-die forged to ASTM F562 and AMS 5758 / 5844 / 5845.
UNS R30035, sold under the trade name MP35N, is a non-magnetic cobalt-nickel-chromium-molybdenum alloy of nominal composition 35Co-35Ni-20Cr-10Mo. It reaches tensile strengths above 2,000 MPa and resists sulfide stress cracking, seawater pitting and hydrogen embrittlement. That combination makes it the highest-strength alloy accepted under NACE MR0175 for sour service. The strength comes from cold work followed by ageing, not from heat treatment alone.
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. We forge UNS R30035 to customer drawings as rings, discs, shafts, bars, sleeves and valve parts, ultrasonically tested and certified to EN 10204 3.1 or 3.2. For a quotation, contact sales@steelforgepieces.com or +86 189 2135 9659.
UNS R30035 at a glance
- UNS number
- R30035
- Common trade name
- MP35N, a registered trademark of SPS Technologies, Inc.
- Werkstoff / DIN
- 2.4999
- Alloy family
- Cobalt-nickel-chromium-molybdenum multiphase alloy. Non-magnetic. Age hardenable only after cold work
- Nominal composition
- 35% Co, 35% Ni, 20% Cr, 10% Mo
- Governing specifications
- ASTM F562, AMS 5758, AMS 5844, AMS 5845, ISO 5832-6, ANSI/NACE MR0175 / ISO 15156-3, NACE MR0103
- Melting route
- VIM + VAR double melt. VIM + ESR where the specification permits
- Delivery conditions
- Solution treated, work strengthened, work strengthened and aged
- Tensile strength range
- 793 MPa annealed to 2,206 MPa work strengthened and aged (115 to 320 ksi)
- Density
- 8.43 g/cm³ (0.305 lb/in³)
- Service temperature
- Cryogenic to approximately 454 °C (850 °F)
- Certification
- EN 10204 3.1 standard. 3.2 third-party witnessed on request
- Forged by
- Jiangyin Jiangnan Metal Co., Ltd., Jiangyin, Jiangsu Province, China
What UNS R30035 is, and when to specify it
UNS R30035 is specified when a part has to be very strong and reliable in a corrosive environment at the same time. Stainless steels and most nickel alloys cannot do both.
Each of the four alloying elements does a distinct job. Cobalt and nickel form a matrix that is stable, tough and non-magnetic. Chromium at 19 to 21% builds the passive oxide film. Molybdenum at 9 to 10.5% supplies the pitting and crevice corrosion resistance in chlorides, which is better than 316 stainless and roughly on a par with alloy 625.
MP in the trade name stands for multiphase, and it describes where the strength comes from. Cold or warm working partially transforms the face-centred cubic matrix into fine hexagonal close-packed platelets. Those platelets obstruct dislocation movement, and ageing at 538 to 649 °C afterwards locks the structure in place. Ageing a forging that has not been worked produces no strength increase at all. This gets missed on drawings and purchase orders more often than any other point about the grade.
Specify UNS R30035 where the design needs high strength together with resistance to sulfide stress cracking, seawater, chlorides or hydrogen embrittlement, and where service stays below about 454 °C. It is not a general high-temperature alloy. Above roughly 450 °C under sustained load, Inconel 718 or Waspaloy carries load better and costs less.
Chemical composition of UNS R30035
Composition limits come from ASTM F562 and are repeated in AMS 5758, 5844 and 5845. Cobalt is the balance. Nickel, chromium and molybdenum are ranged. Everything else is a maximum.
| Element | Minimum % | Maximum % | Role in the alloy |
|---|---|---|---|
| Cobalt (Co) | balance | balance | Base element, nominally about 35%. Provides the multiphase transformation that carries the strengthening |
| Nickel (Ni) | 33.00 | 37.00 | Stabilises the austenitic matrix and contributes toughness and ductility |
| Chromium (Cr) | 19.00 | 21.00 | Forms the passive film that resists oxidation and general corrosion |
| Molybdenum (Mo) | 9.00 | 10.50 | Governs pitting and crevice corrosion resistance in chloride and sour environments |
| Titanium (Ti) | - | 1.00 | Residual limit. Ties up interstitials |
| Iron (Fe) | - | 1.00 | Residual limit |
| Carbon (C) | - | 0.025 | Held very low to avoid carbides that would reduce ductility and corrosion resistance |
| Manganese (Mn) | - | 0.15 | Tight limit, and one of the reasons a double-melt route is required |
| Silicon (Si) | - | 0.15 | Tight limit, controlled through vacuum melting |
| Phosphorus (P) | - | 0.015 | Kept low for hot workability |
| Boron (B) | - | 0.015 | Grain boundary control |
| Sulfur (S) | - | 0.010 | Kept very low for hot workability and toughness |
Composition limits per ASTM F562 and AMS 5758 / 5844 / 5845, compiled by Jiangyin Jiangnan Metal Co., Ltd. The highlighted rows are the interstitial and deoxidiser limits that make double vacuum melting necessary. Every heat is supplied with a ladle analysis on the mill certificate. Product analysis on the finished forging is available on request.
Medical device work often calls for a low-titanium, low-inclusion version of this chemistry, sold under names such as MP35N LT. That is a tightened melt practice inside the same UNS R30035 window rather than a separate UNS number. If your drawing requires it, state the melt practice and the inclusion rating on the enquiry.
Strength of UNS R30035 by delivery condition
There is no single tensile figure for this grade. It runs from roughly 793 MPa to 2,206 MPa depending on how much cold work it has had and whether it was aged afterwards.
A purchase order that says only "UNS R30035, ASTM F562" does not define a strength level, and this is the most common source of confusion on enquiries for the material. Specify the condition, or nominate the AMS specification that carries it.
| Condition | Processing | Tensile strength | Hardness | Typical use |
|---|---|---|---|---|
| Solution annealed | 1038 to 1066 °C (1900 to 1950 °F), 1 to 4 h, rapid cool | 793 to 965 MPa 115 to 140 ksi |
35 HRC max | Maximum ductility for forming, rough machining and further cold work |
| Solution treated to AMS 5758 | 1038 to 1052 °C (1900 to 1925 °F), 4 to 8 h | 793 to 965 MPa 115 to 140 ksi |
35 HRC max | Bars, forgings and rings supplied for downstream working |
| Work strengthened (AMS 5844) | Solution treated, then cold or warm worked | 1517 to 1931 MPa 220 to 280 ksi |
38 HRC min per AMS 5844 | Springs, torsion bars, high-strength shafting |
| Work strengthened and aged (AMS 5845) | Solution treated, worked, then aged 538 to 649 °C (1000 to 1200 °F) for 4 h | 1655 to 2206 MPa 240 to 320 ksi |
up to 51 HRC | Fasteners, valve springs, subsea and sour-service components at peak strength |
Compiled by Jiangyin Jiangnan Metal Co., Ltd. from ASTM F562, AMS 5758 / 5844 / 5845 and published mill data. Values are typical and intended for design screening. Actual results vary with section size, degree of cold work and ageing schedule. The EN 10204 mill test certificate issued with each forging governs acceptance.
Those high strength levels are routine in bar, wire and spring sizes, where a high and uniform degree of cold work is practical. In heavy rings, thick discs and large shafts the achievable cold work is limited by section, and realistic strength lands somewhere between the solution treated and the fully worked-and-aged figures. Tell us the minimum tensile or hardness you need at the enquiry stage and we will confirm what your section can reach before quoting.
Physical properties of UNS R30035
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.43 g/cm³ | 0.305 lb/in³ |
| Melting range | 1315 to 1440 °C | 2400 to 2625 °F |
| Modulus of elasticity, annealed | approx. 233 GPa | approx. 33.8 x 106 psi |
| Mean coefficient of expansion, 20 to 100 °C | approx. 12.8 µm/m·K | approx. 7.1 x 10-6 in/in·°F |
| Magnetic response | Non-magnetic in all conditions. Relative permeability essentially 1.0 | |
| Service temperature range | -184 °C to 454 °C | -300 °F to 850 °F |
Nominal values compiled by Jiangyin Jiangnan Metal Co., Ltd. from published alloy literature for UNS R30035. Physical properties are not normally certified on the mill certificate. Where a design depends on modulus or expansion, request measured values at the enquiry stage.
Heat treatment and forging practice
The alloy responds to ageing only after work strengthening. An ageing cycle applied to solution annealed material changes nothing.
Forging
Forging starts at approximately 1149 °C (2100 °F). Deformation is stopped above about 871 °C (1600 °F), because working the alloy below that temperature causes surface tearing. In hot-working behaviour it is comparable to Waspaloy or alloy 718, so the same press practice, reheat discipline and reduction control apply.
Solution treatment
1038 to 1066 °C (1900 to 1950 °F) for 1 to 4 hours, followed by rapid cooling. Where AMS 5758, 5844 or 5845 is invoked, the specified window is 1038 to 1052 °C (1900 to 1925 °F) held 4 to 8 hours. Solution treatment restores ductility and dissolves the worked structure, and it is the starting point for any subsequent strengthening.
Work strengthening
Cold or warm working after solution treatment is what develops strength. The degree of reduction sets the strength level, so the properties achievable in a forging depend directly on the section that can be worked.
Ageing
538 to 649 °C (1000 to 1200 °F) for approximately 4 hours after working, then air cool. Where the part must satisfy NACE MR0175, use the ageing treatments listed in that standard rather than a generic cycle, since the qualified hardness ceiling depends on it.
Solution treat, then work, then age. Any other order will not produce the properties the specification calls for. If a drawing calls for solution treated and aged with no work strengthening step, query it before the material is processed.
Sour service and NACE MR0175
UNS R30035 is listed in ANSI/NACE MR0175 / ISO 15156-3 and is one of the highest-strength alloys the standard accepts for H2S service. Two hardness ceilings apply, and which one you get depends on the processing route.
| Condition | Maximum hardness | Notes |
|---|---|---|
| Solution treated, or cold worked without ageing | 35 HRC | The general limit where the qualifying ageing treatment has not been applied |
| Solution treated, cold worked and aged | 51 HRC | Permitted where the ageing treatment specified in the standard is followed and documented |
Summarised from ANSI/NACE MR0175 / ISO 15156-3 by Jiangyin Jiangnan Metal Co., Ltd. This summary is for guidance. The current edition of the standard, including its ageing treatment tables and environmental limits, governs. Confirm the applicable clause with your specifying authority.
State the NACE condition on the purchase order. "NACE MR0175 compliant" on its own is ambiguous, because a part certified to 35 HRC and one certified to 51 HRC are made by different routes and have very different strength. In seawater the alloy resists crevice corrosion, pitting and stress corrosion cracking even at maximum strength, which is why it goes into subsurface safety valve springs and wireline components.
UNS R30035 is electrochemically noble. Coupling it to carbon steel, 316 stainless or K-Monel in a conductive environment can drive galvanic attack on the less noble part. Use isolation, coating or a sacrificial anode where dissimilar metals meet.
How UNS R30035 compares with other high-strength grades
Most enquiries come down to a shortlist of four grades. They separate on peak strength, sour-service hardness ceiling, temperature capability and cost.
| Criterion | UNS R30035 (MP35N) | Inconel 718 | Inconel 725 | 17-4PH |
|---|---|---|---|---|
| UNS number | R30035 | N07718 | N07725 | S17400 |
| Base | Co-Ni-Cr-Mo | Ni-Fe-Cr | Ni-Cr-Mo-Nb | Martensitic PH stainless |
| Strengthening | Cold work, then age | Gamma prime and gamma double prime precipitation | Gamma double prime precipitation | Copper precipitation |
| Peak tensile, typical | up to approx. 2,206 MPa | approx. 1,275 MPa | approx. 1,100 MPa | approx. 1,310 MPa (H900) |
| NACE MR0175 ceiling | 51 HRC, cold worked and aged | 40 HRC, limited conditions | 43 HRC | 33 HRC, restricted |
| Upper service temperature | approx. 454 °C | approx. 700 °C | approx. 260 °C in sour service | approx. 315 °C |
| Magnetic | No | No | No | Yes |
| Relative cost | Highest | High | High | Lowest |
| Choose it when | Peak strength plus severe sour or seawater exposure below 454 °C | Sustained load at elevated temperature | High strength with severe corrosion at moderate temperature | Cost matters and the environment is mild |
Comparison compiled by Jiangyin Jiangnan Metal Co., Ltd. from the governing specifications for each grade. Peak tensile figures are typical values in the strongest commonly supplied condition and are indicative only. NACE hardness ceilings are condition-dependent, so verify against the current edition of ANSI/NACE MR0175 / ISO 15156-3 for your service envelope.
Use UNS R30035 when nothing else survives the environment at the strength required below 454 °C. Use Inconel 718 when temperature governs. Use 17-4PH when the environment is mild and cost governs. We forge all four.
Standards and equivalent designations
| Specification | Scope |
|---|---|
| ASTM F562 | Wrought 35Cobalt-35Nickel-20Chromium-10Molybdenum alloy for surgical implant applications. The primary chemistry specification |
| SAE AMS 5758 | Bars, forgings and rings, solution heat treated, VIM-VAR product |
| SAE AMS 5844 | Bars and forgings, solution heat treated and work strengthened |
| SAE AMS 5845 | Bars and forgings, solution heat treated, work strengthened and aged |
| ASTM F688 | Wrought cobalt-35nickel-20chromium-10molybdenum alloy plate, sheet and foil for surgical implants |
| ISO 5832-6 | Implants for surgery, metallic materials, wrought cobalt-nickel-chromium-molybdenum alloy |
| BS 7252-6 | British equivalent for surgical implant applications |
| ANSI/NACE MR0175 / ISO 15156-3 | Materials for use in H2S-containing environments in oil and gas production |
| NACE MR0103 | Materials resistant to sulfide stress cracking in corrosive petroleum refining environments |
| UNS R30035 | Unified Numbering System designation |
| W.Nr. 2.4999 | German Werkstoff number |
| Trade names | MP35N, and low-titanium melt variants sold under related marks |
Compiled by Jiangyin Jiangnan Metal Co., Ltd. Order to UNS R30035 plus the governing specification and the required delivery condition. Where a design registration or code case is involved, confirm equivalence against the mill certificate.
Trademark notice. MP35N is a registered trademark of SPS Technologies, Inc. Inconel is a registered trademark of Special Metals Corporation. Material made by those companies and sold under those brand names is theirs. Material produced by Jiangyin Jiangnan Metal Co., Ltd. is correctly described as UNS R30035 to ASTM F562, AMS 5758, AMS 5844 or AMS 5845: the same generic chemistry, manufactured independently. We are not affiliated with, sponsored by or endorsed by any trademark holder named on this page, and these marks are used solely to identify equivalent material specifications.
UNS R30035 forgings we produce
Every item below is open-die forged or ring-rolled to the customer's drawing or dimensional sketch. There is no fixed catalogue, no tooling charge and no piece minimum.
- Seamless rolled ringsRing-rolled with no weld seam. Rectangular or profiled section.
- Forged flangesWeld neck, slip-on, blind, long weld neck and orifice, to ASME B16.5 / B16.47 or drawing.
- Round bars and billetsForged and peeled or rough turned, cut to length.
- Discs and blanksUpset forged discs for covers, closures and blind ends.
- Shafts and spindlesStraight, stepped and eccentric shafts, pump and valve shafting.
- Sleeves and bushingsHollow forged, trepanned or bored, thin or heavy wall.
- Tube sheetsForged and drilled tube sheets for shell-and-tube exchangers.
- Valve componentsBodies, bonnets, seat rings, stems, gate and plug blanks.
- Fastener blanksBolt, stud and nut blanks for high-strength sour-service fastening.
- Nozzles and blocksForged nozzle bodies, headers, manifold blocks and custom shapes.
Size and weight capability
| Product form | Dimensional range | Unit weight |
|---|---|---|
| Seamless rolled rings | OD 200 to 2,500 mm, height to 600 mm | 20 to 5,000 kg |
| Round bars | Ø80 to 600 mm, length to 4,000 mm | 20 to 3,000 kg |
| Discs and tube sheets | Ø200 to 1,500 mm, thickness to 400 mm | 30 to 5,000 kg |
| Shafts, sleeves, blocks | to 4,000 mm long | to 5,000 kg |
Production capability of Jiangyin Jiangnan Metal Co., Ltd. for UNS R30035. These ranges are narrower than for our carbon and stainless grades, because this alloy is expensive and difficult to work. Machining allowance is normally 6 to 20 mm per surface depending on section size unless the drawing states otherwise. Finish-machined parts are supplied to print. Sizes outside these ranges are quoted case by case.
How UNS R30035 forgings are made
- Melting
Double melted by VIM + VAR, or VIM + ESR where the specification permits. Vacuum melting is what holds carbon to 0.025%, manganese and silicon to 0.15%, and keeps the inclusion content low. AMS 5758, 5844 and 5845 require a VIM-VAR product.
- Billet verification
Heat chemistry is verified by spectrometer against the ASTM F562 limits before any material is heated.
- Open-die forging and ring rolling
Forged from approximately 1149 °C (2100 °F) with deformation stopped above 871 °C (1600 °F) to prevent surface tearing. Controlled reduction closes porosity and develops grain flow that follows the part contour. Rings are rolled seamless.
- Solution treatment
1038 to 1066 °C (1900 to 1950 °F), rapidly cooled. Where an AMS specification is invoked, 1038 to 1052 °C held 4 to 8 hours.
- Work strengthening and ageing
Where the order calls for high strength, the part is cold or warm worked and then aged at 538 to 649 °C (1000 to 1200 °F) for 4 hours. Where NACE MR0175 applies, the ageing treatment from the standard is used and recorded.
- Machining and non-destructive testing
Rough or finish machined to drawing, then ultrasonically examined to EN 10228-3, SEP 1921 or ASTM A388, with liquid penetrant, hardness and dimensional inspection as specified.
- Certification and despatch
EN 10204 3.1 mill certificate as standard, EN 10204 3.2 with third-party witness on request. Hard stamped, preserved and packed for sea or air freight.
Where UNS R30035 forgings are used
| Industry | Components forged in UNS R30035 |
|---|---|
| Oil and gas, subsea | Subsurface safety valve springs and torsion bars, wireline components, wellhead and Christmas tree parts, packer components, high-strength sour-service fasteners and studs |
| Valves and flow control | Valve stems, seat rings, bodies and bonnets for ball, gate, globe, check and plug valves in sour or chloride service |
| Marine and offshore | Seawater-immersed fasteners, shafting, pump and compressor components where crevice corrosion governs |
| Medical and dental | Implant component blanks, surgical instrument stock and dental device parts to ASTM F562 and ISO 5832-6 |
| Aerospace and defence | High-strength non-magnetic fasteners, springs, seals and structural fittings to AMS 5758, 5844 and 5845 |
| Chemical processing | Pump shafts, plunger pump components, seals and hardware exposed to mineral acids and hydrogen sulfide |
| Instrumentation | Non-magnetic components where magnetic permeability must stay at unity under load |
Compiled by Jiangyin Jiangnan Metal Co., Ltd. Applications are indicative. Material selection remains the responsibility of the design authority.
Each of these duties needs strength and corrosion resistance at the same time, below about 454 °C. Where only one of the two is needed, a cheaper alloy will do the job.
Machining and welding UNS R30035
Machining
UNS R30035 work hardens fast and is harder to machine than austenitic stainless steel. Published comparisons with 303 or 316 are misleading and should not be used to plan cycle times.
What works in our shop:
- Rough machine in the solution annealed condition wherever the sequence allows.
- Rigid setups with minimum tool overhang. Deflection causes rubbing, and rubbing work-hardens the surface.
- Sharp positive-rake carbide tooling, replaced on a schedule rather than at failure.
- Low surface speed with a heavy positive feed, so the cutting edge stays under the previously work-hardened layer.
- No dwelling, no riding without cutting, and no interrupted light passes.
- Flood coolant throughout. Heat concentrates at the edge because the alloy conducts heat poorly.
Welding
The alloy can be joined by GTAW using matching or nickel-alloy filler, but welding destroys the cold-worked structure locally and with it the strength that the work strengthening produced. For that reason it is normally specified for components machined from solid rather than fabricated. Where welding is unavoidable, agree the procedure, the filler and the post-weld condition with the design authority before production starts.
Testing, inspection and certification
- Chemical analysis. Spectrometric heat analysis against ASTM F562 limits, with product analysis on the finished forging on request.
- Mechanical testing. Room-temperature tensile, yield, elongation and reduction of area. Elevated or cryogenic temperature testing to your specification.
- Hardness. Rockwell C testing, mandatory where NACE MR0175 applies, reported against the applicable 35 HRC or 51 HRC ceiling.
- Ultrasonic testing. EN 10228-3, SEP 1921 class C/D/E, ASTM A388, or the customer's nominated class.
- Surface NDT. Liquid penetrant examination to ASTM E165 or ASME Section V Article 6.
- Grain size and microstructure. ASTM E112 grain size and metallographic examination where specified.
- Corrosion testing. Sour-service and chloride testing to an agreed programme where the order requires it.
- Certification. EN 10204 3.1 as standard, EN 10204 3.2 witnessed by TÜV, BV, LR, SGS or DNV on request. Full heat traceability and hard stamping.
Frequently asked questions about UNS R30035
What is UNS R30035?
UNS R30035 is a non-magnetic cobalt-nickel-chromium-molybdenum alloy of nominal composition 35% cobalt, 35% nickel, 20% chromium and 10% molybdenum. It is usually sold under the trade name MP35N, where MP stands for multiphase. Cobalt is the balance, nickel runs 33 to 37%, chromium 19 to 21% and molybdenum 9 to 10.5%. The alloy combines very high strength with resistance to sulfide stress cracking, seawater crevice and pitting corrosion, and hydrogen embrittlement.
Is UNS R30035 the same as MP35N?
Yes, the chemistry is the same. MP35N is a registered trademark of SPS Technologies, Inc. UNS R30035 is the generic Unified Numbering System designation used when the material comes from any other mill. Jiangyin Jiangnan Metal Co., Ltd. supplies the material as UNS R30035 to ASTM F562 or the relevant AMS specification, and is not affiliated with the trademark holder. Write purchase orders to UNS R30035 plus the governing specification so the requirement is unambiguous.
What is the chemical composition of UNS R30035?
Per ASTM F562: cobalt balance, nickel 33.00 to 37.00%, chromium 19.00 to 21.00%, molybdenum 9.00 to 10.50%, titanium 1.00% max, iron 1.00% max, carbon 0.025% max, manganese 0.15% max, silicon 0.15% max, phosphorus 0.015% max, boron 0.015% max and sulfur 0.010% max. The low carbon, manganese and silicon limits are why a double-melt VIM-VAR route is needed.
How strong is UNS R30035, and how is that strength developed?
Strength comes from mechanical work rather than heat treatment alone. Solution annealed material runs about 793 to 965 MPa (115 to 140 ksi) tensile. After cold or warm working it reaches roughly 1,517 to 1,931 MPa (220 to 280 ksi), and after work strengthening followed by ageing at 538 to 649 °C for 4 hours it reaches about 1,655 to 2,206 MPa (240 to 320 ksi). Ageing on its own produces no strength increase. The material has to be work strengthened first.
Is UNS R30035 approved for NACE MR0175 sour service?
Yes. UNS R30035 is listed in ANSI/NACE MR0175 / ISO 15156-3 and is one of the highest-strength alloys the standard accepts for sour service. The hardness limit is 35 HRC where the material is not aged, and up to 51 HRC in the solution treated, cold worked and aged condition processed to the ageing treatments given in the standard. State the intended MR0175 condition on the enquiry, since it decides the processing route and the hardness range certified.
Which standards cover UNS R30035 forgings?
ASTM F562 covers wrought 35Co-35Ni-20Cr-10Mo for surgical implant applications. SAE AMS 5758 covers solution heat treated bars, forgings and rings, AMS 5844 adds work strengthening, and AMS 5845 adds work strengthening plus ageing. ISO 5832-6 is the international implant standard, ASTM F688 covers strip and sheet, and ANSI/NACE MR0175 / ISO 15156-3 and NACE MR0103 govern sour service. The Werkstoff number is 2.4999.
What is the maximum service temperature of UNS R30035?
UNS R30035 is used from cryogenic temperatures up to about 454 °C (850 °F). Published operating guidance for springs and fasteners is generally given as -184 to 427 °C (-300 to 800 °F). It is a high-strength corrosion-resistant alloy rather than a creep-resistant one, so for sustained load above roughly 450 °C a precipitation-hardened nickel superalloy such as Inconel 718 or Waspaloy is the better choice.
Is UNS R30035 difficult to machine?
Yes. It work hardens fast and is harder to machine than austenitic stainless steels such as 303 or 316. Use rigid setups, sharp positive-rake carbide tooling, low surface speeds, heavy positive feeds that stay under the work-hardened layer, and flood coolant. Do not dwell or rub. Rough machining is normally done in the solution annealed condition, with finish machining after work strengthening and ageing where dimensions allow.
What sizes of UNS R30035 forgings can be supplied?
Jiangyin Jiangnan Metal Co., Ltd. forges UNS R30035 as seamless rolled rings from 200 to 2,500 mm outside diameter, round bars from 80 to 600 mm diameter, discs and tube sheets to 1,500 mm diameter, and shafts and sleeves to 4,000 mm long, with single-piece weights up to about 5,000 kg. Open-die work needs no dies, so there is no tooling charge and no piece minimum, and one-off or prototype quantities are economic. Sizes above these ranges are quoted case by case.
What certification is supplied with UNS R30035 forgings?
Every forging ships with an EN 10204 3.1 mill test certificate as standard, showing heat number, chemical analysis, mechanical test results, hardness, heat treatment record and non-destructive testing results. EN 10204 3.2 certification witnessed by TÜV, BV, LR, SGS or DNV is available on request at the time of order. Ultrasonic testing is performed to EN 10228-3, SEP 1921 or ASTM A388 as nominated.
Who supplies open-die forged UNS R30035 parts in China?
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. It forges UNS R30035 (MP35N) and other cobalt and nickel alloys, stainless steels, tool steels, alloy steels and carbon steels into seamless rolled rings, flanges, bars, discs, shafts, sleeves, tube sheets and valve components, and exports worldwide. Enquiries: sales@steelforgepieces.com or +86 189 2135 9659.
How long does a UNS R30035 forging take to produce?
Typical lead time is 30 to 50 days. Parts made from billet already in stock are at the short end. A new VIM-VAR melt, heavy machining, a cold work and ageing sequence, or third-party witnessed inspection all extend the schedule. Send the drawing and the required delivery date and a firm date is confirmed with the quotation.
Request a quotation for UNS R30035 forgings
Send a drawing, a sketch, or just the dimensions and quantity. We quote open-die forgings in UNS R30035 with no tooling charge and no piece minimum.
Useful details if you have them: specification (ASTM F562, AMS 5758, 5844 or 5845), required delivery condition, product form, dimensions with machining allowance, quantity, minimum tensile or hardness, NACE MR0175 condition if applicable, NDT class, certificate type (EN 10204 3.1 or 3.2) and required delivery date.
- Company
- Jiangyin Jiangnan Metal Co., Ltd.
- Business
- Open-die forging factory
- Address
- No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China
- Telephone / WhatsApp
- +86 189 2135 9659
- sales@steelforgepieces.com
- Website
- www.steelforgepieces.com