1.6565 forgings
Seamless rolled rings, forged flanges, round bars, discs, tube sheets, shafts, sleeves and valve components, open-die forged in 40NiCrMo6 to your drawing.
1.6565 is the Werkstoff number for 40NiCrMo6, a nickel‑chromium‑molybdenum direct‑hardening engineering steel used in the quenched and tempered condition. It carries about 0.40 % carbon with 1.40–1.70 % nickel, 0.90–1.40 % chromium and 0.20–0.30 % molybdenum. The nickel, chromium and molybdenum together give it deep hardenability. A 1.6565 forging can be oil quenched through a heavy section and still reach useful strength at the core, so it is specified for shafts, gear blanks, crankshafts and valve bodies in sizes where a plain chromium‑molybdenum steel such as 42CrMo4 will not through‑harden. It has no corrosion resistance and is not used above about 400 °C.
Also catalogued as 40NiCrMo6, 40 NiCrMo 6 and DIN 1.6565, and cross-referenced to 34CrNiMo6, SAE 4340, 40CrNiMoA and 40KhN2MA.
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 1.6565 to customer drawings on 1, 3, 5 and 9 tonne hammers and a 5,000 tonne hydraulic press, from steel melted by EAF + LF + VD, and supplies every piece ultrasonically tested and certified to EN 10204 3.1 or 3.2. For a quotation, send a drawing to sales@steelforgepieces.com or call +86 189 2135 9659.
- Werkstoff number
- 1.6565
- Steel name
- 40NiCrMo6 (also written 40 NiCrMo 6)
- Steel family
- Ni-Cr-Mo direct-hardening engineering steel
- Nearest EN grade
- 34CrNiMo6 (1.6582); see the equivalents table
- Nearest US grade
- SAE / AISI 4340 (UNS G43400), near match
- Carbon
- 0.35–0.45 %
- Nickel
- 1.40–1.70 %
- Chromium
- 0.90–1.40 %
- Molybdenum
- 0.20–0.30 %
- Melting route
- EAF + LF + VD (vacuum degassed)
- Forging temperature
- 1,150–1,200 °C, finish above 850 °C
- Hardening
- 830–860 °C, oil quench
- Tempering
- 540–680 °C to the strength class ordered
- Annealed hardness
- ≤ 248 HB for machining
- Carbon equivalent CE(IIW)
- ≈ 0.90, so preheat and PWHT are required for welding
- Delivery condition
- +A annealed, +N normalised or +QT quenched and tempered
- Ultrasonic testing
- EN 10228-3, SEP 1921 or ASTM A388
- Certification
- EN 10204 3.1 standard, 3.2 third-party witnessed
- Maximum single piece
- 15,000 kg, diameters to 6,000 mm
- Forged by
- Jiangyin Jiangnan Metal Co., Ltd., Jiangyin, Jiangsu, China
What 1.6565 is, and when to specify it
1.6565 belongs to the group of direct-hardening engineering steels alloyed with nickel, chromium and molybdenum together. Nickel raises toughness and lowers the transition temperature, so the steel stays ductile in thick sections. Chromium and molybdenum shift the transformation curves to the right, which lets the steel be quenched more slowly and still form martensite. Molybdenum also slows temper embrittlement, the loss of impact toughness this family suffers if it is tempered in the 425–550 °C range.
Hardenability is the reason to pay for 1.6565 instead of a cheaper grade. In a 40 mm bar, 42CrMo4 and 1.6565 both quench through and give similar test-piece figures. In a 200 mm shaft, the 42CrMo4 core is soft and coarse while 1.6565 is still martensitic to the centre. Specify 1.6565 when the ruling section is heavy, when the part is loaded in torsion or bending so that core properties matter, or when a customer specification names 34CrNiMo6, 817M40 or 4340 and a forging in that class is required.
Where 1.6565 is the wrong choice: it has no useful corrosion resistance and must be painted, plated or oiled. It loses tempered strength above roughly 400 °C, so it is not a creep-service steel. It is difficult to weld. It is also not a substitute for aerospace 4340: flight hardware must be ordered to AMS 6414 or AMS 6415, which set the melting route, cleanliness and test scope.
Chemical composition of 1.6565 (40NiCrMo6)
The window below is the specification we forge to. Every heat is supplied with a ladle analysis on the mill certificate; a product analysis taken from the finished forging can be added on request.
| Element | Minimum % | Maximum % | What it does in this steel |
|---|---|---|---|
| Carbon (C) | 0.35 | 0.45 | Sets the attainable hardness of the martensite. This is a medium-carbon grade, hardenable but not case-hardening. |
| Silicon (Si) | 0.15 | 0.35 | Deoxidiser; raises tempering resistance slightly. |
| Manganese (Mn) | 0.60 | 0.80 | Deoxidiser, combines with sulfur, adds hardenability. |
| Phosphorus (P) | – | 0.035 | Residual. Kept low because it promotes temper embrittlement. |
| Sulfur (S) | – | 0.040 | Residual. Lower limits available on request for transverse toughness. |
| Chromium (Cr) | 0.90 | 1.40 | Main hardenability contributor; raises tempering resistance. |
| Molybdenum (Mo) | 0.20 | 0.30 | Adds hardenability and suppresses temper embrittlement in heavy sections. |
| Nickel (Ni) | 1.40 | 1.70 | Raises core toughness and lowers the ductile-to-brittle transition temperature. |
| Iron (Fe) | balance | – | Base element. |
Highlighted rows are the four elements that define the grade. Hydrogen is held below approximately 2 ppm by vacuum degassing; on heavy forgings this is a delivery requirement, not an option. Table compiled by Jiangyin Jiangnan Metal Co., Ltd.
Mechanical properties of 1.6565 forgings
Quenched and tempered properties are governed by ruling section, the greatest thickness through which heat has to escape during the quench. A 1.6565 test bar and a 1.6565 shaft cut from the same heat give different numbers, and the difference is not a defect. State the ruling section and the required strength class on the order so that the tempering temperature and the test-piece location can be set correctly.
Indicative quenched and tempered properties (+QT)
| Ruling section | Rp0.2 min, MPa | Rm, MPa | A5 min, % | Z min, % | KV min, J | Typical HB |
|---|---|---|---|---|---|---|
| ≤ 16 mm | 900 | 1100–1300 | 9 | 40 | 35 | 331–401 |
| > 16 to 40 mm | 800 | 1000–1200 | 10 | 45 | 45 | 302–363 |
| > 40 to 100 mm | 700 | 900–1100 | 11 | 50 | 45 | 269–331 |
| > 100 to 160 mm | 600 | 800–950 | 12 | 50 | 45 | 248–302 |
| > 160 to 250 mm | 550 | 750–900 | 13 | 50 | 45 | 223–277 |
Values follow the property pattern of the 34CrNiMo6 / 4340 family and are given for design screening. The strength class actually certified is agreed at order stage and confirmed on the EN 10204 mill test certificate, which governs acceptance. Sections above 250 mm are quoted case by case.
Other delivery conditions
| Condition | Treatment | Tensile, MPa | Hardness | Used for |
|---|---|---|---|---|
| +A soft annealed | 650–700 °C, furnace cool | ≤ 850 | ≤ 248 HB | Rough machining before hardening; supply condition for customers who heat treat in house |
| +N normalised | 850–880 °C, air cool | 800–950 | 220–280 HB | Grain refinement after forging; blanks for further machining |
| +QT quenched and tempered | 830–860 °C oil, temper 540–680 °C | 750–1300 | 223–401 HB | Final service condition; see Table 2 |
Physical properties of 1.6565
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Modulus of elasticity | 210 GPa | 30.5 × 10⁶ psi |
| Shear modulus | 80 GPa | 11.6 × 10⁶ psi |
| Poisson's ratio | 0.29 | 0.29 |
| Thermal conductivity, 100 °C | 44 W/m·K | 305 Btu·in/ft²·h·°F |
| Specific heat, 20 °C | 475 J/kg·K | 0.114 Btu/lb·°F |
| Mean expansion, 20–100 °C | 12.3 µm/m·K | 6.8 × 10⁻⁶ in/in·°F |
| Electrical resistivity | 0.22 µΩ·m | 132 Ω·circ mil/ft |
| Magnetic response | Ferromagnetic | |
| Ac1 / Ac3, approximate | 725 °C / 780 °C, composition dependent | |
| Ms, approximate | 300 °C | |
Nominal values for low-alloy steel of this composition, offered for design screening. Where a value is safety critical, have it measured on the actual heat.
Heat treatment of 1.6565
| Operation | Temperature | Cooling | Purpose and notes |
|---|---|---|---|
| Forging | 1,150–1,200 °C | Controlled, in furnace or insulating medium | Do not finish below 850 °C. Heavy sections need a slow, controlled cool to avoid hydrogen flaking. |
| De-hydrogenation | 600–650 °C | Slow furnace cool | Long soak after forging on heavy sections, to let residual hydrogen diffuse out before the structure hardens. |
| Normalising | 850–880 °C | Still air | Refines the as-forged grain and evens out the structure before hardening. |
| Soft annealing | 650–700 °C | Furnace cool, about 20 °C/h to 600 °C | Produces a spheroidised structure at 248 HB or below for machining. |
| Hardening | 830–860 °C | Oil quench | Soak through section, then quench. Polymer quenchants are used on thin sections to limit distortion. |
| Tempering | 540–680 °C | Air, or accelerated in heavy sections | Sets the final strength class. Minimum two hours plus one hour per 25 mm of section. |
| Stress relief | 550–650 °C | Slow cool | After heavy machining or welding. Always at least 30 °C below the last tempering temperature. |
Avoid tempering in the 425–550 °C band on heavy sections, and cool quickly through it. Nickel-chromium steels lose impact toughness if they dwell in that range, because phosphorus and other tramp elements segregate to the prior austenite grain boundaries. The 0.20–0.30 % molybdenum in 1.6565 slows this down, but a 300 mm shaft cools over many hours and can still be affected. Keep phosphorus low, temper above 550 °C where the strength class allows, and quench from the tempering temperature in water or forced air.
1.6565 equivalent grades and cross-references
This steel reaches buyers under at least a dozen designations. The table lists the chemistry beside each one so a substitution can be checked before it is accepted. On chemistry, BS 970 817M40, the old EN24, is the closest single match to 1.6565. 34CrNiMo6 is close but carries less carbon, and SAE 4340 trades chromium for nickel.
| System | Designation | C | Cr | Ni | Mo | How close |
|---|---|---|---|---|---|---|
| W.Nr. / DIN, Germany | 1.6565 / 40NiCrMo6 | 0.35–0.45 | 0.90–1.40 | 1.40–1.70 | 0.20–0.30 | This grade |
| BS 970, UK | 817M40 (EN24) | 0.36–0.44 | 1.00–1.40 | 1.30–1.70 | 0.20–0.35 | Closest match on all four elements |
| EN 10083-3 | 34CrNiMo6 (1.6582) | 0.30–0.38 | 1.30–1.70 | 1.30–1.70 | 0.15–0.30 | Close; lower carbon, so slightly lower peak strength |
| EN 10083-3 | 36CrNiMo4 (1.6511) | 0.32–0.40 | 0.90–1.20 | 0.90–1.20 | 0.15–0.30 | Related; less nickel, so less hardenability in heavy sections |
| SAE / AISI, USA | 4340 (UNS G43400) | 0.38–0.43 | 0.70–0.90 | 1.65–2.00 | 0.20–0.30 | Near match; more nickel, less chromium. Comparable hardenability |
| SAE / AISI, USA | 4337 (UNS G43370) | 0.35–0.40 | 0.70–0.90 | 1.65–2.00 | 0.20–0.30 | Near match, lower carbon variant of 4340 |
| W.Nr., Germany | 1.6562 / 40NiCrMo8-4 | 0.38–0.43 | 0.70–0.90 | 1.65–2.00 | 0.20–0.30 | The German designation for 4340 chemistry |
| GB/T 3077, China | 40CrNiMoA | 0.37–0.44 | 0.60–0.90 | 1.25–1.65 | 0.15–0.25 | Near match; lower chromium and molybdenum |
| GOST 4543, Russia | 40KhN2MA (40ХН2МА) | 0.37–0.44 | 0.60–0.90 | 1.25–1.65 | 0.15–0.25 | Near match; the GOST counterpart of 40CrNiMoA |
| JIS G4053, Japan | SNCM439 | 0.36–0.43 | 0.60–0.90 | 1.60–2.00 | 0.15–0.30 | Near match; the Japanese 4340 counterpart |
| AFNOR, France | 40NCD7 | – | – | – | – | Related grade in the same family; confirm chemistry against the current AFNOR sheet |
| BS 970, UK | 818M40 (EN25) | – | – | – | – | Higher nickel; a step up, not an equal substitute |
A cross-reference table is a starting point for enquiry, not an approval. Two grades that match on chemistry can still differ in the mechanical property table, the test-piece position and the acceptance criteria of their governing standards. Where a design code, class society or third-party certificate is involved, write the required chemistry, properties and test scope onto the purchase order and let the mill certificate confirm them. Jiangyin Jiangnan Metal Co., Ltd. accepts orders under any of the designations above and issues a certificate listing every specification the heat actually satisfies.
Machining, welding and surface treatment
Machining
Machine 1.6565 in the annealed condition wherever the design allows. At 248 HB or below it turns, bores and drills with conventional carbide tooling and behaves much like 42CrMo4. Above about 300 HB in the quenched and tempered condition tool life drops, so use coated carbide or CBN with rigid setups and reduced feed. This steel does not work harden the way austenitic stainless and nickel alloys do, so the heavy-feed technique used on those materials is unnecessary. Where a part is finished after hardening, allow for grinding on the critical diameters.
Welding
Weldability is poor. Any weld on 1.6565 is a procedure to be qualified, not a shop-floor repair. Using the IIW formula CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15, the carbon equivalent of 1.6565 is approximately 0.90 at mid-range composition and can reach 1.04 at the top of the window. Any value above 0.60 calls for full hydrogen control.
- Preheat 250–350 °C and hold interpass temperature within that band.
- Low-hydrogen consumables only, 5 ml per 100 g diffusible hydrogen or less, baked and held in a quiver.
- Post-weld heat treatment immediately after welding, 30–50 °C below the last tempering temperature, before the joint cools to room temperature.
- Qualify the procedure to ISO 15614-1 or ASME Section IX. Do not rely on a generic WPS.
Surface treatment
1.6565 has no corrosion resistance of its own. Nitriding at 500–530 °C produces a hard, fatigue-resistant case and is common on shafts and gear journals, provided the core has already been tempered above the nitriding temperature. Induction hardening of bearing diameters is routine. Hard chrome plating, phosphating and paint are all used; where the part is plated or acid pickled after hardening, bake at 190–220 °C for at least four hours to relieve absorbed hydrogen, because at these strength levels the steel is susceptible to hydrogen embrittlement.
Engineering tools for 1.6565
Four calculators that run in the browser. No data is sent to a server.
1. Designation lookup
Type any name from a drawing or purchase order and see whether it refers to 1.6565 or to a near equivalent.
2. Ruling section and strength class
Enter the greatest thickness of the finished part to see the strength class 1.6565 can realistically be certified to, and the tempering band that reaches it.
3. Forging weight and quench mass
Rough mass of a 1.6565 forging at 7.85 g/cm³, including the machining allowance that has to be forged and paid for.
4. Carbon equivalent and preheat
Enter the ladle analysis from your mill certificate to get CE(IIW), Pcm and a preheat band for screening. Defaults are the mid-range 1.6565 composition.
These tools are provided for guidance by Jiangyin Jiangnan Metal Co., Ltd. and are not a substitute for a qualified welding procedure, a heat treatment specification or a stress calculation.
1.6565 forgings we produce
Every item below is open-die forged to the customer drawing or dimensional sketch. There is no fixed catalogue, no die cost and no minimum piece quantity.
Seamless rolled rings
Ring-rolled with no weld seam, rectangular or profiled section, for bearing races, gear rims and flanged joints.
Forged flanges
Weld neck, slip-on, blind, long weld neck and orifice flanges to ASME B16.5, B16.47 or drawing.
Round bars and billets
Forged, then peeled or rough turned and cut to length. Straightened and ultrasonically tested.
Discs, blanks and tube sheets
Upset forged discs for covers, closures and blind ends; tube sheets drilled or supplied blank.
Shafts and spindles
Straight, stepped and eccentric shafts, forged crankshafts, pinion shafts and rotor blanks.
Sleeves and bushings
Hollow forged, trepanned or bored, thin or heavy wall, for hydraulic and press applications.
Gear blanks and pinions
Upset and pierced blanks for gearbox, mill drive and turbine gearing.
Valve components
Bodies, bonnets, seat rings, stems, gate, ball and plug blanks for ball, gate, globe, check and plug valves.
Blocks, nozzles and manifolds
Rectangular blocks, forged nozzle bodies, headers and custom shapes to print.
Size and weight capability in 1.6565
| Product form | Dimensional range | Unit weight |
|---|---|---|
| Seamless rolled rings | OD 200–4,000 mm, height to 1,000 mm | 20–12,000 kg |
| Round bars and billets | Ø 80–1,200 mm, length to 8,000 mm | 20–10,000 kg |
| Discs, blanks, tube sheets | Ø 80–6,000 mm, thickness to 800 mm | 10–15,000 kg |
| Shafts, sleeves, blocks | Length to 8,000 mm | to 15,000 kg |
Forged on 1, 3, 5 and 9 tonne open-die hammers and a 5,000 tonne hydraulic press. Machining allowance is normally 6–20 mm per surface depending on section size, unless the drawing states otherwise. Finish-machined parts are supplied to print.
How we make 1.6565 forgings
- Melting: EAF + LF + VDElectric arc furnace, ladle refining, then vacuum degassing. Degassing is not optional on this steel. Nickel-chromium-molybdenum compositions are prone to hydrogen flaking, and vacuum degassing takes dissolved hydrogen down to roughly 2 ppm so that a heavy forging can pass ultrasonic examination.
- Chemistry verificationHeat analysis confirmed by optical emission spectrometer against the Table 1 window before the ingot is charged.
- Open-die forgingHeated to 1,150–1,200 °C and worked on hammers or the 5,000 tonne press with a forging ratio that closes ingot porosity and orients the grain flow along the loaded direction of the part. Finishing temperature held above 850 °C. Rings are ring-rolled seamless.
- Controlled cooling and de-hydrogenationHeavy sections cooled under control and soaked at 600–650 °C to let residual hydrogen diffuse out, then normalised or annealed to refine the as-forged structure.
- Quenching and temperingAustenitised at 830–860 °C, oil quenched, then tempered between 540 and 680 °C to the ordered strength class, with accelerated cooling from tempering temperature on heavy sections.
- Machining and non-destructive testingRough or finish machined to drawing, then ultrasonically examined to EN 10228-3, SEP 1921 or ASTM A388 at the class stated on the order, with magnetic particle inspection to EN 10228-1 where required.
- Certification and despatchEN 10204 3.1 mill test certificate as standard, or 3.2 witnessed by TÜV, BV, LR, SGS or DNV. Hard stamped, preserved and packed for sea or air freight.
Where 1.6565 forgings are used
| Industry | Components forged in 1.6565 |
|---|---|
| Power transmission and gearing | Gear blanks and rims, pinion shafts, gearbox input and output shafts, couplings, torsion bars, turbine and compressor rotor shafts |
| Oil, gas and offshore | Valve bodies, bonnets, seat rings and stems; wellhead and christmas tree components; riser connectors, subsea clamps, drill collars and subs |
| Heavy machinery and mining | Crankshafts, eccentric shafts, connecting rods, press columns and tie rods, mill pinions, rolling mill spindles, crusher shafts and eccentrics |
| Marine and shipbuilding | Propeller shafts, intermediate shafts, rudder stocks and stern tube components, subject to class society approval |
| Pumps and compressors | Plunger pump crossheads and rods, chemical pump shafts, reciprocating compressor piston rods and crankshafts |
| Cement, sugar and process plant | Mill and kiln drive pinions, mixer and agitator shafts, roll shafts, forged rolls and eccentric drive components |
| Fasteners and hydraulics | High-strength studs, tie rods and bolt blanks, hydraulic cylinder rods and gland components |
| Tooling | Die holders and bolsters, mandrels, forging tooling and heavy-duty machine components |
Most of these parts have a heavy section under high, often reversing load. A soft core shortens fatigue life, which is why the nickel and molybdenum content matters more here than the tensile figure on the certificate.
Testing, inspection and certification
- Chemical analysis. Spectrometric ladle analysis on every heat; product analysis on the finished forging on request.
- Mechanical testing. Room-temperature tensile, 0.2 % proof, elongation and reduction of area; Charpy V-notch impact at room temperature or a specified sub-zero temperature; Brinell hardness survey.
- Ultrasonic testing. EN 10228-3, SEP 1921 class C, D or E, or ASTM A388 to the acceptance class you nominate.
- Magnetic particle inspection. EN 10228-1 or ASTM A275 on machined surfaces.
- Microstructure and grain size. Metallographic examination and grain size to ASTM E112 where specified.
- Jominy hardenability. End-quench test to ISO 642 or ASTM A255 on request, which is the direct way to prove hardenability on a heavy section order.
- Certification. EN 10204 3.1 mill test certificate as standard, showing heat number, chemistry, mechanical results, heat treatment record and NDT results. EN 10204 3.2 witnessed by TÜV, BV, LR, SGS or DNV on request at order stage. Full heat traceability and hard stamping.
Plant inspection equipment includes universal tensile testing machines, impact testing machines, Brinell and Rockwell hardness testers, magnetic particle flaw detectors, ultrasonic flaw detectors, optical emission spectrometers and metallographic microscopes. Quality system certified to ISO 9001:2015.
Frequently asked questions about 1.6565
What is 1.6565 steel?
1.6565 is the Werkstoff (material) number for 40NiCrMo6, a nickel-chromium-molybdenum direct-hardening engineering steel supplied in the quenched and tempered condition. It contains roughly 0.35–0.45 % carbon, 0.90–1.40 % chromium, 1.40–1.70 % nickel and 0.20–0.30 % molybdenum. It belongs to the same family as SAE 4340 and 34CrNiMo6 and is used for highly stressed shafts, gears, crankshafts and valve components.
What is the chemical composition of 1.6565?
Carbon 0.35–0.45 %, silicon 0.15–0.35 %, manganese 0.60–0.80 %, phosphorus 0.035 % max, sulfur 0.040 % max, chromium 0.90–1.40 %, molybdenum 0.20–0.30 %, nickel 1.40–1.70 %, balance iron. Jiangyin Jiangnan Metal Co., Ltd. states the ladle analysis of each heat on the EN 10204 mill test certificate, and can add a product analysis on the finished forging when required.
Is 1.6565 the same as AISI 4340?
They are close relatives, not identical. Both are nickel-chromium-molybdenum quenched and tempered steels with about 0.40 % carbon. SAE 4340 carries higher nickel, 1.65–2.00 %, and lower chromium, 0.70–0.90 %, while 1.6565 carries 1.40–1.70 % nickel and 0.90–1.40 % chromium. Hardenability and attainable strength are comparable. Where a design code, class society or third-party approval is involved, order to the chemistry and property table written on the purchase order rather than to a cross-reference table.
What is the equivalent grade of 1.6565?
The nearest counterparts are 34CrNiMo6 (1.6582) and 36CrNiMo4 (1.6511) in Europe, SAE/AISI 4340 (UNS G43400) and 4337 in the United States, 40CrNiMoA in China under GB/T 3077, 40KhN2MA in the GOST 4543 system, SNCM439 in JIS G4053, 817M40 or 818M40 in BS 970, and 40NCD7 in the AFNOR system. All of these are near matches with small differences in nickel, chromium and carbon, so the substitution should be confirmed against the actual specification. On chemistry alone, 817M40 is the closest single match.
What heat treatment is applied to 1.6565 forgings?
Typical practice is soft annealing at 650–700 °C with a furnace cool to reach 248 HB or less for machining, normalising at 850–880 °C with air cooling, hardening from 830–860 °C with an oil quench, and tempering from 540–680 °C chosen to reach the ordered strength class. Cooling from the tempering temperature should be accelerated in heavy sections to avoid temper embrittlement.
What strength can 1.6565 reach after quenching and tempering?
Attainable strength falls as ruling section increases, because the quench cannot cool the core fast enough. Indicative values are 900 MPa proof strength with 1,100–1,300 MPa tensile strength up to 16 mm ruling section, 700 MPa proof with 900–1,100 MPa tensile between 40 and 100 mm, and 550 MPa proof with 750–900 MPa tensile between 160 and 250 mm. The strength class must be stated on the order so the tempering temperature and test position can be set correctly.
Can 1.6565 be welded?
Only with full procedural control. The IIW carbon equivalent of 1.6565 is about 0.90 and can reach 1.04 at the top of the composition range, so the steel is highly hardenable in the heat affected zone. Preheat of 250–350 °C, low-hydrogen consumables of 5 ml per 100 g or less, maintenance of interpass temperature and post-weld heat treatment 30–50 °C below the last tempering temperature are the normal requirements. Welding procedures should be qualified to ISO 15614-1 or ASME Section IX.
Why are 1.6565 forgings vacuum degassed?
Nickel-chromium-molybdenum steels of this composition are sensitive to hydrogen flaking, which is internal cracking caused by dissolved hydrogen coming out of solution as a heavy forging cools. Vacuum degassing after ladle refining reduces hydrogen to about 2 ppm, and heavy sections are additionally given a controlled cooling and de-hydrogenation soak after forging. Together these steps are what allow a large 1.6565 forging to pass ultrasonic examination to EN 10228-3.
What testing and certification are supplied with 1.6565 forgings?
Standard scope is spectrometric chemical analysis, room-temperature tensile and elongation testing, Charpy V-notch impact testing, Brinell hardness, and ultrasonic examination to EN 10228-3, SEP 1921 or ASTM A388 at the class stated on the order. Magnetic particle inspection to EN 10228-1, grain size to ASTM E112 and microstructure examination are added on request. Every forging ships with an EN 10204 3.1 mill test certificate; EN 10204 3.2 witnessed by TÜV, BV, LR, SGS or DNV is available.
Who supplies open-die forged 1.6565 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 1.6565 and 40NiCrMo6 into seamless rolled rings, flanges, round bars, discs, tube sheets, shafts, sleeves, bushings and valve components to customer drawings, on 1, 3, 5 and 9 tonne hammers and a 5,000 tonne hydraulic press, and exports worldwide. Enquiries go to sales@steelforgepieces.com or +86 189 2135 9659.
Request a quotation for 1.6565 forgings
Send a drawing, a sketch, or just the dimensions and quantity. Open-die forgings in 1.6565 are quoted with no tooling charge and no piece minimum. Fill the fields below and the button will open a pre-written email.
- Company
- Jiangyin Jiangnan Metal Co., Ltd.
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- No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China
- Telephone / WhatsApp
- +86 189 2135 9659
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