Alloy 230 and Haynes 230 are two names for one grade, UNS N06230: a nickel-chromium-tungsten-molybdenum superalloy containing nominally 22 % Cr, 14 % W and 2 % Mo with a nickel balance. It is strengthened in solid solution rather than by ageing, and it retains strength while resisting oxidation, nitriding and carburising in air up to about 1149 °C (2100 °F), which makes it a standard choice for gas turbine combustors, furnace internals and nitric acid catalyst grids.
Jiangyin Jiangnan Metal Co., Ltd., an open-die forging factory in Jiangyin City, Jiangsu Province, China, manufactures this grade to AMS 5891 under either name: forged rings and seamless rolled rings, round bars, discs, flanges, shafts, sleeves, bushings, tube sheets and forged pipe. Every piece is ultrasonically tested to EN 10228-3, SEP 1921 or ASTM A388 and released under an EN 10204 3.1 or 3.2 certificate. Drawings can be sent to sales@steelforgepieces.com or +86-189-2135-9659.
What are Alloy 230 and Haynes 230?
Alloy 230 and Haynes 230 are two names for the same wrought nickel-base superalloy, designated UNS N06230. Its strength at temperature comes from tungsten and molybdenum held in solid solution, supported by a stable dispersion of primary M6C carbides that resists grain coarsening during long exposures. A small lanthanum addition improves the adhesion of the protective chromia scale under thermal cycling.
For a design engineer this has two practical consequences. Haynes 230 keeps useful creep-rupture strength well above the range of stainless steels and tolerates repeated heating and cooling without spalling its oxide. And because it needs no ageing treatment, unlike Inconel 718 or Waspaloy, heavy forged sections carry the same properties from surface to core.
Jiangyin Jiangnan Metal Co., Ltd. supplies the grade exclusively as open-die forgings and seamless rolled rings, made to the customer's drawing rather than cut from stock, which allows grain flow to follow the part contour and avoids the machining loss of carving a large part out of bar. Orders may be placed under either designation.
Alloy 230 and Haynes 230: two names, one grade
Buyers meet this alloy under both names, and the distinction is one of naming rather than metallurgy.
| Name | What it is | How it is ordered |
|---|---|---|
| Haynes 230 | The trade name under which the alloy was introduced and is still widely specified on drawings | Usually written on the drawing or the enquiry; certified against AMS 5891 or ASTM B564 |
| Alloy 230 | The generic designation for the same chemistry, free of any trade name | The wording most mills and standards use; identical AMS 5891 requirements |
| UNS N06230 | The formal number that both names resolve to, with W.Nr. 2.4733 as the European equivalent | The designation to quote when a purchase order must be unambiguous |
In practice a forging ordered as Alloy 230 and a forging ordered as Haynes 230 are certified against the same chemistry limits, the same room-temperature minimums and the same solution-annealing practice. Jiangyin Jiangnan Metal quotes and certifies to whichever designation appears on the customer's drawing, and the mill certificate carries the UNS number so that receiving inspection has no ambiguity.
HAYNES® and 230® are registered trademarks of Haynes International, Inc. Jiangyin Jiangnan Metal Co., Ltd. is an independent forging manufacturer and is not affiliated with, licensed by or endorsed by Haynes International. Material supplied is UNS N06230 forged and certified to AMS 5891 or ASTM B564; the trade name is used only to identify the grade a customer has specified.
Alloy 230 and Haynes 230 chemical composition
The table below gives the chemistry limits Jiangyin Jiangnan Metal certifies against, in weight percent, per AMS 5891 for UNS N06230. The same limits apply whether the order is written as Alloy 230 or as Haynes 230.
| Element | Minimum | Maximum |
|---|---|---|
| Nickel (Ni) | Balance | |
| Chromium (Cr) | 20.00 | 24.00 |
| Tungsten (W) | 13.00 | 15.00 |
| Molybdenum (Mo) | 1.00 | 3.00 |
| Cobalt (Co) | – | 5.00 |
| Iron (Fe) | – | 3.00 |
| Manganese (Mn) | 0.30 | 1.00 |
| Silicon (Si) | 0.25 | 0.75 |
| Aluminium (Al) | 0.20 | 0.50 |
| Carbon (C) | 0.05 | 0.15 |
| Lanthanum (La) | 0.005 | 0.05 |
| Copper (Cu) | – | 0.50 |
| Titanium (Ti) | – | 0.10 |
| Phosphorus (P) | – | 0.030 |
| Sulfur (S) | – | 0.015 |
| Boron (B) | – | 0.015 |
Ladle and product analysis for each heat are reported on the EN 10204 3.1 certificate issued with the forgings. Tungsten at 13–15 % is what separates this grade from Hastelloy X and Inconel 617.
Haynes 230 mechanical properties
Room-temperature minimums for solution-annealed Haynes 230 bar, forgings and rings, identical to those certified for Alloy 230:
| Material | Test temperature | Tensile strength | 0.2 % yield strength | Elongation | Hardness |
|---|---|---|---|---|---|
| Alloy 230 / Haynes 230 (N06230) | Room temperature | 758 MPa 110 ksi |
310 MPa 45 ksi |
35 % min | 241 HB max |
The values above are specified minimums. As-tested results for each forging lot run higher and are recorded on the mill certificate. Tensile specimens are taken from a prolongation or sacrificial ring heat treated together with the production forging. Please state the required test location and orientation on your enquiry.
Physical properties of UNS N06230
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.97 g/cm³ | 0.324 lb/in³ |
| Melting range | 1301–1371 °C | 2375–2500 °F |
| Modulus of elasticity (RT) | 211 GPa | 30.6 × 10⁶ psi |
| Thermal conductivity (RT) | 8.9 W/m·K | 61.7 Btu·in/h·ft²·°F |
| Max continuous service, oxidising air | ≈ 1149 °C | ≈ 2100 °F |
| Solution-annealing temperature | 1177–1246 °C | 2150–2275 °F |
Published typical values for the wrought grade, given for design guidance only. Design allowables should be taken from the applicable code or the alloy producer's datasheet.
Standards, designations and equivalent grades
| Category | Designation |
|---|---|
| Generic designation | Alloy 230 |
| UNS number | N06230 |
| Werkstoff number | 2.4733 |
| Trade name | Haynes 230, HAYNES® 230® alloy |
| Bar, forgings and rings | SAE AMS 5891 |
| Nickel alloy forgings | ASTM B564 / ASME SB-564 |
| Rod and bar | ASTM B572 |
| Plate, sheet and strip | ASTM B435 / AMS 5878 |
| Inspection document | EN 10204 3.1, or 3.2 with third-party witnessing |
| Ultrasonic testing | EN 10228-3, SEP 1921, ASTM A388 |
Where a project allows an alternative high-temperature nickel alloy, Jiangyin Jiangnan Metal can quote the same drawing in Hastelloy X, Inconel 617, Incoloy 800HT or Haynes 25, so the buyer can compare price and lead time before releasing the order.
Alloy 230 and Haynes 230 forged products we manufacture
Every item below is produced as an open-die forging or a seamless rolled ring to the customer's drawing, in Alloy 230 or Haynes 230 as specified.
Forged rings & seamless rolled rings
Radial-axial rolled rings with continuous circumferential grain flow for casings, retaining rings and catalyst grid frames.
OD 100–2500 mm · height to 800 mmForged round bars
Press-forged, straightened and solution annealed; supplied black, rough-turned or peeled.
Ø 50–800 mm · length to 6000 mmForged discs & blanks
Upset and flattened discs for turbine and compressor components, with UT-ready parallel faces.
Ø to 2000 mm · thickness 30–500 mmForged flanges
WN, SO, BL and special flanges to ASME B16.5, B16.47 or drawing, in Haynes 230 for hot gas duty.
DN 15–DN 2000 · Class 150–2500Forged shafts & spindles
Stepped and eccentric shafts for pumps, compressors and process machinery.
Ø 80–900 mm · length to 8000 mmSleeves, bushings & hollow bars
Trepanned or mandrel-forged hollows, reducing machining loss on thick-wall parts.
OD 120–1500 mm · wall from 25 mmTube sheets & forged plate
Heat-exchanger tube sheets and cover plates, UT class to EN 10228-3 on request.
Ø to 2500 mm · thickness to 400 mmValve bodies, seats & stems
Near-net forged valve components for ball, gate, globe, check and plug valves.
Piece weight 5 kg–20 000 kgHow Haynes 230 forgings are made
- Melting: EAF + VOD + ESRElectric arc melting with vacuum oxygen decarburisation, followed by electroslag remelting to tighten sulfur and phosphorus, refine the ingot structure and minimise segregation before forging.
- Heating and coggingIngots are heated slowly and soaked to a uniform temperature, then cogged from roughly 1180 °C (2150 °F). The alloy is stiff at forging heat, so reduction is taken in several heats.
- Open-die forging or ring rollingUpsetting, drawing out, punching and radial-axial ring rolling shape the part with grain flow following its contour. Forging is finished above about 950 °C (1750 °F).
- Solution annealingFull solution anneal at 1177–1246 °C (2150–2275 °F) followed by rapid cooling, restoring a uniform recrystallised structure. No ageing treatment is applied, because the grade is not precipitation hardened.
- Rough machiningTurning or milling to the agreed UT condition and machining allowance. Low speeds, positive rake and rigid setups are used because the alloy work hardens rapidly.
- Testing and certificationChemistry, mechanical testing, hardness, grain size, ultrasonic and dye-penetrant inspection as ordered, then release under EN 10204 3.1 or 3.2.
Where Alloy 230 forgings are used
| Industry | Components forged in Alloy 230 / Haynes 230 |
|---|---|
| Gas turbines & aerospace | Combustor components, transition ducts, nozzle and burner hardware, forged rings and casings for hot-section assemblies |
| Power generation | Furnace internals, hot gas ducting flanges, expansion-bellows end rings, forged discs and spindles |
| Chemical & petrochemical | Nitric acid catalyst grids and baskets, reactor internals, forged shafts for chemical and plunger pumps |
| Pressure vessels & heat exchangers | Forged tube sheets, shell flanges, nozzles and forged pipe for shell-and-tube exchangers and air receivers |
| Valves | Forged bodies, bonnets, seat rings, valve blocks and stems for ball, gate, globe, check and plug valves |
| Oil & gas | Subsea and deepwater production hardware, wellhead and Christmas-tree components, compressor and generator parts |
| Heavy machinery | Forged rolls, wheels, manifolds and gears for pulp and paper, pharmaceutical and biochemical plant |
Inspection, testing and certificates
- Chemical analysis. ladle and product analysis on every heat, reported against AMS 5891 limits.
- Mechanical testing. room-temperature tensile, hardness, and elevated-temperature or impact testing when specified.
- Ultrasonic testing. to EN 10228-3, SEP 1921 or ASTM A388, to the quality class stated on the order.
- Surface NDT. liquid penetrant inspection to ASTM E165 / ASME V for non-magnetic nickel alloys.
- Dimensional report. measured against the customer drawing before release.
- Certification. EN 10204 3.1 as standard, or EN 10204 3.2 counter-signed by a third party such as SGS, BV, TÜV or Lloyd's Register.
How to request an Alloy 230 or Haynes 230 forging quotation
Send the drawing or the finished dimensions to sales@steelforgepieces.com, or call +86-189-2135-9659. To price a forging accurately, Jiangyin Jiangnan Metal needs:
- Drawing or finished / rough-machined dimensions, and quantity;
- Specification to certify against, for example AMS 5891 or ASTM B564;
- Delivery condition: as forged, solution annealed, rough turned or finish machined;
- Ultrasonic testing standard and acceptance class, if required;
- Mechanical test location and orientation, and any third-party witnessing;
- Destination port and required delivery date.
Quotations are normally returned within one working day, whether the enquiry is written as Alloy 230 or as Haynes 230.
Frequently asked questions about Alloy 230 and Haynes 230
What are Alloy 230 and Haynes 230?
Alloy 230 and Haynes 230 are two names for the same nickel-chromium-tungsten-molybdenum superalloy, designated UNS N06230 and Werkstoff 2.4733. It contains nominally 22 % chromium, 14 % tungsten and 2 % molybdenum with a nickel balance, is solid-solution strengthened, and is used for components that must keep their strength and resist oxidation, nitriding and carburising at temperatures up to about 1149 °C (2100 °F). Jiangyin Jiangnan Metal Co., Ltd. forges the grade into rings, bars, discs, flanges and shafts to AMS 5891 under either name.
Is Alloy 230 the same as Haynes 230?
Yes. Haynes 230 is the trade name under which the alloy was introduced; Alloy 230 is the generic designation for the same chemistry. Both resolve to UNS N06230 (Werkstoff 2.4733), and material ordered under either name to AMS 5891 meets identical chemistry and mechanical requirements. Jiangyin Jiangnan Metal Co., Ltd. quotes and certifies to whichever designation appears on the customer's drawing.
Is Haynes 230 age hardened or precipitation hardened?
No. Haynes 230, sold generically as Alloy 230, is a solid-solution-strengthened alloy whose elevated-temperature strength comes from tungsten and molybdenum in solution together with a stable dispersion of primary M6C carbides. It is supplied in the solution-annealed condition, typically annealed at 1177–1246 °C (2150–2275 °F) and rapidly cooled. No ageing or precipitation-hardening treatment is applied, which is the main practical difference between this grade and Inconel 718, Waspaloy or Rene 41.
At what temperature is Haynes 230 forged?
Haynes 230 and Alloy 230 are forged identically. Hot working starts from approximately 1180 °C (2150 °F) and forging is finished above roughly 950 °C (1750 °F), with reheating between passes as required. Because the alloy is stiff at forging temperature, Jiangyin Jiangnan Metal Co., Ltd. forges it in multiple heats on hydraulic presses and follows forging with a full solution anneal and rapid cooling to restore a uniform recrystallised grain structure.
Which standards cover Alloy 230 and Haynes 230 forgings?
Bars, forgings and rings in this grade are commonly ordered to SAE AMS 5891. ASTM B564 (ASME SB-564) covers nickel alloy forgings and ASTM B572 covers UNS N06230 rod and bar. Inspection documents are issued to EN 10204 3.1, or EN 10204 3.2 when third-party witnessing is required. Ultrasonic testing is performed to EN 10228-3, SEP 1921 or ASTM A388 as specified by the customer.
What is the maximum service temperature of Alloy 230?
Alloy 230 is used continuously in oxidising air at temperatures up to about 1149 °C (2100 °F). Its chromium and aluminium content forms a protective, adherent oxide scale, and the lanthanum addition improves scale adhesion under thermal cycling, which is why the alloy is chosen for gas turbine combustors, furnace internals and nitric acid catalyst grids.
How does Haynes 230 compare with Hastelloy X and Inconel 617?
All three are solid-solution-strengthened high-temperature nickel alloys. Haynes 230, also designated Alloy 230, uses roughly 14 % tungsten and is selected for long-term thermal stability combined with high creep strength and oxidation resistance. Hastelloy X relies on molybdenum with higher iron and is often chosen on cost and fabricability. Inconel 617 uses about 12.5 % cobalt plus aluminium. Jiangyin Jiangnan Metal Co., Ltd. forges all three grades and can quote alternatives against a single drawing.
Can Alloy 230 and Haynes 230 be welded and machined?
The grade is readily welded by GTAW, GMAW and SMAW using matching 230-W filler metal, and no post-weld heat treatment is normally required because it is not precipitation hardened, although a solution anneal may be specified where full property recovery or stress relief is needed. It machines like other solid-solution nickel alloys such as Haynes 25 and Haynes 188. Use rigid setups, sharp positive-rake tooling, low surface speeds, a positive feed that stays under the work-hardened layer, and flood coolant.
What certificates are supplied with Alloy 230 and Haynes 230 forgings?
Every shipment carries an EN 10204 3.1 certificate reporting heat number, ladle and product chemistry, heat-treatment record, mechanical test results and NDT results, with the UNS number stated so that receiving inspection has no ambiguity. EN 10204 3.2 certificates counter-signed by SGS, BV, TÜV or Lloyd's Register are available when the order requires third-party witnessing.
Who manufactures Alloy 230 and Haynes 230 forgings 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, that manufactures Alloy 230 and Haynes 230 (UNS N06230) forged rings, seamless rolled rings, bars, discs, flanges, shafts, sleeves, bushings and tube sheets. Enquiries: sales@steelforgepieces.com, +86-189-2135-9659.
What information is needed to quote an Alloy 230 or Haynes 230 forging?
To quote, Jiangyin Jiangnan Metal Co., Ltd. needs the finished or rough-machined dimensions or a drawing, the quantity, the specification to be certified against (for example AMS 5891), the delivery condition, and any ultrasonic testing class, mechanical test location or third-party witnessing requirement. Drawings can be sent to sales@steelforgepieces.com and are normally quoted within one working day.
About the manufacturer
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory in Jiangyin City, Jiangsu Province, China. The works produces forged rings, seamless rolled rings, forged bars, discs, flanges, shafts, sleeves, bushings and tube sheets in carbon steel, alloy steel, tool steel, stainless steel and nickel alloys, including Alloy 230 and Haynes 230 (UNS N06230), Inconel, Incoloy, Monel and Hastelloy grades. Forgings are made to customer drawings and released under EN 10204 3.1 or 3.2 inspection documents.
- Company
- Jiangyin Jiangnan Metal Co., Ltd.
- Factory address
- No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China
- Telephone
- +86-189-2135-9659
- sales@steelforgepieces.com
- Website
- www.steelforgepieces.com
- Capability
- Open-die forging, seamless rolled rings, heat treatment, rough machining
Doc. JNM-DS-N06230 · Rev. 3 · Issued
Jiangyin Jiangnan Metal Co., Ltd., Jiangyin, Jiangsu, China
https://www.steelforgepieces.com/Nickel-Alloy/Alloy-230.html
Prepared and reviewed by the technical sales department of Jiangyin Jiangnan Metal Co., Ltd. Composition and property limits are taken from AMS 5891 and published wrought-alloy data. Last reviewed .