Nickel alloy forgings, sour-service grade

UNS N09945 forgings, forged rings and flanges

Q: What heat treatment is used for UNS N09945 forgings?

Solution anneal at 1010 to 1066 C (1850 to 1950 F) for 0.5 to 4 hours followed by a water quench, then a two-step age: hold at 704 to 732 C (1300 to 1350 F) for 6 to 8 hours, furnace cool at 26 to 56 C per hour to 607 to 635 C (1125 to 1175 F), hold 6 to 8 hours, then air cool. This double-aging cycle develops the strengthening precipitates while keeping hardness within the 42 HRC sour-service limit.

Open-die forgings in UNS N09945, the age-hardenable nickel-iron-chromium alloy sold under the trade name Incoloy® alloy 945, produced to ASTM B637 and to the sour-service limits of NACE MR0175 / ISO 15156-3.

Min. yield strength: 125 ksi862 MPa, annealed + aged
Min. tensile strength: 150 ksi1034 MPa
Hardness for sour service: 32–42 HRC42 HRC NACE ceiling
Sour-service rating: Level VIIand Level VI-450 °F

UNS N09945 is an age-hardenable nickel-iron-chromium alloy containing 45–55 % nickel, 19.5–23 % chromium, 3–4 % molybdenum, 2.5–4.5 % niobium and 1.5–3 % copper, with iron as the balance. It is commonly called Incoloy alloy 945. Aging precipitates gamma-prime and gamma-double-prime particles that raise the minimum yield strength to 125 ksi (862 MPa). The nickel, molybdenum and copper give resistance to sulfide stress cracking and chloride stress-corrosion cracking in hot sour wells.

Jiangyin Jiangnan Metal Co., Ltd. forges this grade into seamless rolled rings, flanges, round bars, shafts, discs, sleeves, bushings, tube sheets, valve bodies and wellhead components, supplied with EN 10204 3.1 or 3.2 certification. Send a drawing to sales@steelforgepieces.com for a quotation.

What UNS N09945 is, and when to specify it

UNS N09945 is used for equipment in deep, hot, sour oil and gas wells. High-strength carbon and low-alloy steels crack under these conditions. Standard austenitic stainless steels resist the environment but cannot carry wellhead pressure at a practical wall thickness.

The composition addresses both requirements. Nickel at 45–55 % resists chloride stress-corrosion cracking, and together with molybdenum and copper it also gives general corrosion resistance in reducing acids. Molybdenum at 3–4 % resists pitting and crevice corrosion. Chromium at 19.5–23 % covers oxidizing conditions. Niobium, titanium and aluminum contribute no corrosion resistance. They form the gamma-prime and gamma-double-prime precipitates that develop during aging and carry the strength.

The aged alloy reaches 125 ksi minimum yield strength at a hardness below the 42 HRC ceiling that NACE MR0175 / ISO 15156-3 sets for H₂S service. That combination of strength and sour-service acceptance in a single condition is the reason the grade is specified.

Designations and equivalents

Designations for UNS N09945 No EN or Werkstoff number is assigned. Order against the UNS number.
UNS number	N09945
Common trade name	Incoloy® alloy 945
Also written as	UNS NO9945, N09945, alloy 945, 945 alloy
Higher-strength variant	N09946
Product specification	ASTM B637
Sour-service standard	NACE MR0175 / ISO 15156-3
Wellhead equipment	API 6ACRA, API 6A
EN / Werkstoff	None assigned

N09945 and N09946 are different grades. UNS N09945 is alloy 945 at 125 ksi minimum yield. UNS N09946 is alloy 945X at 140 ksi minimum yield. The nominal chemistry is the same and the property limits are not. Material ordered under one number may fail acceptance testing written against the other, so we confirm the UNS number in writing before releasing billet.

Chemical composition

Limiting composition in weight percent, with iron as the balance. Ladle analysis is reported on every certificate. Product analysis is available on request.

UNS N09945 limiting chemical composition, wt % Iron is the balance, typically around 20 %. Niobium is reported as Nb+Ta on some certificates.
Limit	C	Si	Mn	P	S	Cr	Ni	Mo	Cu	Nb	Ti	Al	Fe
Min	0.005	—	—	—	—	19.5	45.0	3.0	1.5	2.5	0.5	0.01	Bal.
Max	0.04	0.50	1.00	0.030	0.030	23.0	55.0	4.0	3.0	4.5	2.5	0.70	Bal.

Composition limits follow the alloy originator's published data sheet for INCOLOY alloy 945 and ASTM B637.

Mechanical properties

Two property sets apply to this grade and they are not interchangeable. The annealed and aged condition is the sour-service condition, limited to 42 HRC. The cold-worked and aged shaft grade reaches higher strength at up to 46 HRC, which is above the NACE MR0175 limit for N09945. State the required condition on the order.

Limiting room-temperature mechanical properties Impact energy determined at −59 °C (−75 °F).
Condition	Yield, min	Tensile, min	Elong., min	R. of area, min	Impact, min	Hardness
Annealed + aged sour-service condition	125 ksi 862 MPa	150 ksi 1034 MPa	18 %	25 %	40 ft·lb 54 J	32–42 HRC
Annealed, cold drawn + aged pump-shaft grade	165 ksi 1138 MPa	180 ksi 1241 MPa	15 %	20 %	—	38–46 HRC

Shaft grade is not a sour-service grade. NACE MR0175 / ISO 15156-3 accepts wrought UNS N09945 in the solution-annealed and aged condition to a maximum of 42 HRC. The cold-worked shaft grade exceeds that limit. It is suitable for pump shafting and is not suitable for sour-service pressure-containing components.

Properties in heavy forged sections

Typical results for annealed and aged round bar from 25 mm to 356 mm diameter show yield strength varying by about 7 % and hardness by 3 HRC across the range. Elongation, reduction of area and impact energy at the largest sizes stay within the same band as the small sizes.

Typical properties of annealed and aged round bar, by section size Typical mill values, not guaranteed minima. Impact energy at −59 °C, transverse orientation for 89 mm and above.
Diameter	Yield	Tensile	Elong.	R. of area	Impact	Hardness
25 mm	920 MPa	1194 MPa	27.8 %	48.0 %	103 J	40 HRC
51 mm	914 MPa	1174 MPa	28.2 %	47.6 %	95 J	40 HRC
89 mm	934 MPa	1186 MPa	25.5 %	40.5 %	79 J	43 HRC
114 mm	925 MPa	1163 MPa	28.6 %	46.7 %	84 J	42 HRC
152 mm	972 MPa	1214 MPa	22.0 %	34.6 %	75 J	42 HRC
305 mm	981 MPa	1184 MPa	26.3 %	43.6 %	83 J	40 HRC
356 mm	967 MPa	1167 MPa	26.6 %	30.7 %	105 J	39 HRC

Typical mill data for annealed and aged round bar, from the alloy originator's published technical bulletin. Values from our own heats are reported on each EN 10204 certificate.

Physical properties

Room-temperature physical properties of UNS N09945 Melting range excepted. For weight calculation and thermal design, not for acceptance.
Density	8.2 g/cm³ (0.296 lb/in³)
Melting range	1270–1377 °C (2317–2510 °F)
Young's modulus	201 GPa (29.1 × 10⁶ psi)
Shear modulus	74 GPa (10.8 × 10³ ksi)
Poisson's ratio	0.31
Electrical resistivity	1.10 µΩ·m
Thermal conductivity at 23 °C	10.9 W/m·°C
Specific heat at 23 °C	445 J/kg·°C
Mean CTE, 25–93 °C	14.2 × 10⁻⁶/°C
Mean CTE, 25–427 °C	15.1 × 10⁻⁶/°C
Magnetic permeability at 15.9 kA/m	1.003

Sour-service and corrosion performance

NACE MR0175 / ISO 15156-3 accepts wrought UNS N09945 in the solution-annealed and age-hardened condition at a maximum hardness of 42 HRC, qualified to Level VII and to Level VI-450 °F severity.

Qualification used C-ring specimens tested to NACE TM0177 Method C, stressed to 100 % of actual yield strength, for 90 days.

Sour-service qualification conditions and results C-ring tests per NACE TM0177 Method C, judged by visual examination at 20×.
Severity level	H₂S	CO₂	Chloride	Temperature	Result
Level VII	3500 kPa	3500 kPa	25 wt % NaCl	205 °C	No failure, 90 days
Level VI-450 °F	3500 kPa	3500 kPa	20 wt % NaCl	232 °C	No failure, 90 days

Localized and chloride corrosion

Pitting and crevice corrosion perforate a component while the surrounding wall stays at full thickness, so wall-thickness monitoring does not detect them. Critical pitting temperature measured by ASTM G48 is 50 °C for UNS N09945 and 35 °C for the lower-alloyed Incoloy 925 (N09925). The difference follows from the molybdenum and chromium content.

In boiling 25 % sodium chloride at pH 1.5 (ASTM G123), U-bend specimens stressed beyond yield showed no cracks after 720 hours. Type 304 stainless steel cracked after 22 hours in the same test. In boiling 45 % magnesium chloride (ASTM G36) the alloy does crack, as austenitic materials generally do, but time to failure was about twice that of Incoloy 925 and about eleven times that of Type 304.

Slow strain rate test data for hydrogen embrittlement assessment

Slow strain rate testing in 25 wt% NaCl with 0.5 wt% acetic acid under 100 psig H₂S, at a strain rate of 4 × 10⁻⁶ s⁻¹, returned environment-to-air ratios of 0.85 to 0.94 for time to failure, elongation and reduction of area at both 121 °C and 149 °C, with no secondary cracking observed. Ratios in that band indicate the alloy retains close to its full air ductility in a sour environment.

Manufacturing route for UNS N09945 forgings

1. Melting

Billet is double melted: electric arc furnace with vacuum oxygen decarburization, followed by electroslag remelting (EAF + VOD, then ESR). Vacuum induction melting with vacuum arc remelting (VIM + VAR) is available where a customer specification requires it. The niobium and titanium that produce the age-hardening response also form inclusions in a dirty melt, so double melting is standard practice for this grade.

2. Open-die forging

Hot working range is 930–1150 °C (1700–2100 °F). Working behavior is close to Inconel 718, so the same press practice applies: adequate bite on each draw, controlled finishing temperature, and no forging below the lower limit. We work to a minimum reduction ratio of 4:1 unless the customer specification requires more, and use upset-and-draw sequences where the geometry allows so that grain flow follows the part contour rather than running out at a machined surface.

3. Ring rolling

Rings are pierced and rolled rather than cut from plate or bar. A seamless rolled ring has circumferential grain flow, no weld seam, and no end grain exposed at the bore.

4. Solution anneal and double age

Heat-treatment cycle for UNS N09945 Standard cycle for the annealed and aged sour-service condition. Furnace charts are retained and issued with the certificate.
Step	Temperature	Hold	Cooling
Solution anneal	1010–1066 °C 1850–1950 °F	0.5–4 h	Water quench
First age	704–732 °C 1300–1350 °F	6–8 h	Furnace cool at 26–56 °C/h
Second age	607–635 °C 1125–1175 °F	6–8 h	Air cool

The alloy can be annealed from 954 °C upward. The narrower 1010–1066 °C window gives better control of grain size, and that is the range we use. The controlled furnace cool between the two aging steps requires programmable furnaces. Omitting it produces material that meets tensile requirements but can fall outside the hardness or impact limits.

Sizes and forms in UNS N09945

Open-die forging requires no dedicated tooling, so single pieces carry no tooling cost. This suits wellhead and valve components ordered in small quantities and one-off replacement parts.

Product forms and size range Confirm the envelope for your part with our sales engineers before designing to these limits.
Form	Size range	Typical use
Seamless rolled rings	OD 200–3000 mm height to 800 mm	Body rings, seat rings, flange blanks
Forged flanges	DN 15–DN 2000 WN, SO, BL, RTJ, custom	Pressure vessels, pipework, wellhead
Round bars and forging stock	Ø 20–800 mm	Machining stock, fasteners, stems
Shafts and spindles	Ø 50–700 mm length to 6000 mm	Pump shafts, eccentric shafts, spindles
Discs, disks and blanks	Ø to 2000 mm	Closures, tube sheets, blind covers
Sleeves, bushings, hollow bars	OD to 1200 mm	Wear parts, liners, hangers
Valve and wellhead parts	To drawing	Bodies, bonnets, seats, stems, blocks, hangers
Piece weight	0.5 kg to 20 t	—

Equipment

Hydraulic open-die presses, CNC ring-rolling mills, programmable car-bottom and pit-type heat-treatment furnaces with water quench tanks, and CNC turning and machining centers for rough and finish machining. Non-destructive testing is carried out on site. Confirm current press tonnage and furnace dimensions with our sales engineers for your specific part.

Applications for UNS N09945 forgings

Applications for this grade involve high pressure, hydrogen sulfide, chlorides, or a combination of the three, usually in components that are expensive or difficult to replace.

Oil and gas, onshore and subsea

Wellhead and Christmas-tree bodies and blocks, tubing and casing hangers, landing nipples, packers, tool joints, valve bodies, bonnets, seats and stems, downhole tubulars, and subsea and deepwater production hardware. This is the primary market for the grade and accounts for most of our N09945 output.

Valves and flow control

Forged bodies, seat rings, blocks, gates, plugs and stems for ball, gate, globe, check and plug valves in sour service, together with strainer and manifold components. Forgings are specified over castings in this duty because casting porosity at a sealing face is not acceptable.

Pressure equipment and heat transfer

Tube sheets, forged flanges, nozzles, shell rings and closures for pressure vessels, air receivers, shell-and-tube heat exchangers, columns, towers, separators and preheaters handling sour or chloride-bearing process streams.

Rotating equipment

Chemical and plunger pump shafts, eccentric shafts, spindles, compressor components, gears and forged bushings in corrosive duty. Shaft applications often call for the cold-worked and aged shaft grade, which is above the NACE sour-service hardness limit. Confirm the required condition at inquiry stage.

Chemical and process industry

Fasteners, high-strength piping components, crystallizer and reactor internals, and process-module hardware in reducing acid service.

Testing, inspection and certification

Standard inspection and documentation scope for UNS N09945 forgings:

Inspection and documentation scope
Item	Standard or method
Chemical analysis	Ladle analysis on every heat; product analysis on request; PMI by XRF or OES
Tensile testing	ASTM E8 / E8M or ISO 6892-1, from prolongations representing the part
Hardness	ASTM E18 (HRC), required for NACE MR0175 acceptance
Impact testing	Charpy V-notch, ASTM E23, at −59 °C or customer temperature
Ultrasonic testing	EN 10228-3, SEP 1921, ASTM A388, or ASTM B637 supplementary requirements
Surface NDT	Liquid penetrant, ASTM E165 or ASME V Article 6
Grain size and microstructure	ASTM E112; micrographs on request
Corrosion testing	ASTM G48 pitting, ASTM A262 or G28 intergranular, on request
Heat-treatment records	Furnace charts retained and issued with the certificate
Certification	EN 10204 3.1 as standard; EN 10204 3.2 third-party witnessed on request
Sour-service statement	NACE MR0175 / ISO 15156-3 compliance declaration
Traceability	Hard-stamped heat number and item number, traceable to the melt

Third-party inspection can be arranged at any hold point. Tell us at inquiry stage if witnessed testing is required, because the inspection plan affects the production schedule.

UNS N09945 compared with other grades

The alloys most often considered alongside UNS N09945 for sour oil and gas service:

UNS N09945 against commonly considered alloys Indicative values for typical oilfield product specifications. Confirm against the governing specification and its current edition.
Alloy	Nominal Ni	Nominal Mo	Min. yield	Strengthening	Selection basis
N09945 alloy 945	45–55 %	3–4 %	125 ksi 862 MPa	Age hardened	Strength with sour-service acceptance; CPT 50 °C
N09946 alloy 945X	45–55 %	3–4 %	140 ksi 965 MPa	Age hardened	Same chemistry, higher strength floor
N09925 Incoloy 925	42–46 %	2.5–3.5 %	110 ksi 759 MPa	Age hardened	Lower cost where 110 ksi is sufficient; CPT 35 °C
N07718 Inconel 718	50–55 %	2.8–3.3 %	120 ksi 827 MPa	Age hardened	High-temperature strength, wide availability
N07725 Inconel 725	55–59 %	7–9.5 %	120 ksi 827 MPa	Age hardened	Highest pitting resistance in this group
N08825 Incoloy 825	38–46 %	2.5–3.5 %	30 ksi 207 MPa	Solid solution	Corrosion resistance where strength is not governing

Selection summary. Solid-solution grades such as N08825 are used where the component carries no significant load. Incoloy 925 is used where 110 ksi covers the design and the environment is less severe. UNS N09945 is used where 125 ksi and NACE MR0175 acceptance are both required in a hot, high-chloride, high-H₂S well. Inconel 725 is used where pitting resistance governs and the higher molybdenum content is justified.

Welding and machining

Welding. Gas tungsten arc welding and pulsed gas metal arc welding are both suitable, using matching alloy 945 filler or a 725-type nickel filler. Submerged arc welding and shielded metal arc welding are not recommended. Matching filler gives better results: cross-weld tensile specimens made with matching filler fail in the base metal, while 725-type deposits fail in the weld. For pulsed GMAW in spray-arc transfer, keep current below approximately 185 A on standard power sources. Re-anneal and re-age after welding to restore full properties.

Machining. The alloy machines acceptably in either the annealed or the aged condition. Use rigid setups and positive rake angles, and maintain feed to avoid work hardening the cut surface. Standard practice is to rough machine before aging and finish machine after final heat treatment, which keeps heat-treatment distortion out of the finished dimensions.

How to order UNS N09945 forgings

Send the following with the inquiry. A drawing alone is normally enough to start.

Drawing or dimensions. PDF, STEP or DWG, or the finished OD, ID, height and tolerances. State whether the dimensions are finish-machined or rough.
Quantity and delivery date. Single pieces are accepted; there is no tooling cost to spread.
Specification and edition. For example ASTM B637, API 6ACRA, or your own company specification number.
Condition. Solution annealed and aged for sour service, or cold-worked and aged shaft grade.
Sour-service requirement. If NACE MR0175 / ISO 15156-3 applies, state the severity level and hardness limit.
Testing and certification. EN 10204 3.1 or 3.2, ultrasonic acceptance class, impact test temperature, third-party inspection.
Machining scope. As-forged, rough machined with allowance, or finish machined to drawing.

Quotations are returned within 24 hours on working days. Write to sales@steelforgepieces.com or call +86 189 2135 9659.

Frequently asked questions about UNS N09945

What is UNS N09945?

UNS N09945 is an age-hardenable nickel-iron-chromium alloy containing 45–55 % nickel, 19.5–23 % chromium, 3–4 % molybdenum, 2.5–4.5 % niobium and 1.5–3 % copper, with iron as the balance. It is widely known by the trade name Incoloy alloy 945. Niobium, titanium and aluminum form gamma-prime and gamma-double-prime precipitates during aging, raising the minimum yield strength to 125 ksi (862 MPa). The nickel, molybdenum and copper provide resistance to sulfide stress cracking and chloride stress-corrosion cracking.

Is UNS N09945 the same as Incoloy 945X?

No. UNS N09945 corresponds to alloy 945, with a minimum yield strength of 125 ksi (862 MPa). Alloy 945X is the higher-strength grade at 140 ksi (965 MPa) minimum yield and carries a separate designation, UNS N09946. The two share the same nominal chemistry but are qualified to different property limits, so the UNS number must appear on the purchase order.

Is UNS N09945 accepted for sour service under NACE MR0175?

Yes. NACE MR0175 / ISO 15156-3 accepts wrought UNS N09945 in the solution-annealed and age-hardened condition at a maximum hardness of 42 HRC, qualified to Level VII and to Level VI-450 °F severity. Qualification C-ring testing to NACE TM0177 Method C ran 90 days without failure at 205 °C in 3500 kPa H₂S plus 3500 kPa CO₂ with 25 wt% NaCl, stressed to 100 % of yield.

Which standard covers UNS N09945 forgings?

ASTM B637 is the usual product specification for precipitation-hardenable nickel-alloy bars, forgings and forging stock, and it is the one most buyers cite for UNS N09945. For wellhead and Christmas-tree equipment, API 6ACRA and API 6A also apply, and sour-service acceptance is governed by NACE MR0175 / ISO 15156-3. Some buyers additionally reference ASTM B564 for forged flanges and fittings, so confirm the exact specification and edition on the inquiry.

What heat treatment is used for UNS N09945 forgings?

Solution anneal at 1010–1066 °C (1850–1950 °F) for 0.5 to 4 hours followed by a water quench, then a two-step age: hold at 704–732 °C (1300–1350 °F) for 6–8 hours, furnace cool at 26–56 °C per hour to 607–635 °C (1125–1175 °F), hold 6–8 hours, then air cool. This double-aging cycle develops the strengthening precipitates while keeping hardness within the 42 HRC sour-service limit.

What is the maximum service temperature of UNS N09945?

In sour service the practical ceiling is set by the NACE MR0175 / ISO 15156-3 qualification, which covers the alloy to Level VI-450 °F, that is 232 °C. Published mechanical data are generally quoted to 450 °F for that reason. The alloy retains useful modulus above that temperature, but any application beyond the qualification limit must be assessed separately.

How does UNS N09945 compare with Inconel 718 and Incoloy 925?

UNS N09945 sits between Incoloy 925 and the higher-molybdenum grades. Against Incoloy 925 it offers a higher minimum yield strength, 125 ksi against 110 ksi, and higher pitting resistance, with a critical pitting temperature of 50 °C against 35 °C in ASTM G48 testing. Against oilfield Inconel 718 it gives better resistance to sulfide stress cracking in high-H₂S, high-chloride wells because of its higher nickel and copper content, which is why it is selected for deep sour wellhead and downhole components.

Can UNS N09945 be welded?

Yes, using gas tungsten arc welding or pulsed gas metal arc welding with matching alloy 945 filler or a 725-type nickel filler. Submerged arc welding and shielded metal arc welding are not recommended. Best properties are obtained when the component is re-annealed and re-aged after welding using the standard cycle.

What is the minimum order quantity?

Jiangyin Jiangnan Metal Co., Ltd. produces UNS N09945 forgings to order, including single-piece prototype and replacement items, because open-die forging requires no dedicated tooling. Send a drawing or the required dimensions, quantity, heat-treatment condition and certification level to sales@steelforgepieces.com for a quotation.

What certification is supplied?

EN 10204 type 3.1 certification is issued as standard, covering heat chemistry, mechanical test results, hardness, heat-treatment records and non-destructive testing. EN 10204 type 3.2 certification witnessed by a third-party inspectorate is available on request, together with NACE MR0175 / ISO 15156-3 compliance statements and full traceability from the melt heat number.

What is the typical lead time?

Lead time depends on billet availability and on the heat-treatment and testing scope rather than on press time. Nickel-alloy billet for this grade is normally procured against the order, so lead time is longer than for carbon or alloy steel forgings. We give a firm date with the quotation once the specification is fixed.

About the manufacturer

Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China, with road access to the ports of Shanghai and Ningbo.

We forge carbon steel, alloy steel, tool steel, stainless steel and nickel-based alloys into seamless rolled rings, flanges, shafts, bars, discs, sleeves, bushings, tube sheets and valve components, working to customer drawings and to ASTM, ASME, API, EN and DIN specifications. Nickel-alloy grades forged regularly include UNS N09945, Inconel 718, Inconel 725, Incoloy 925, Incoloy 825, Monel K-500 and Hastelloy C-276.

Supplier details
Company	Jiangyin Jiangnan Metal Co., Ltd.
Type	Open-die forging factory
Address	No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China
Telephone	+86 189 2135 9659
Email	sales@steelforgepieces.com
Website	www.steelforgepieces.com
Materials	Carbon steel, alloy steel, tool steel, stainless steel, nickel alloys
Process	Open-die forging, seamless ring rolling, heat treatment, machining, NDT
Certification issued	EN 10204 3.1 as standard; 3.2 third-party witnessed on request

Sources and citation

Material data on this page is compiled from the alloy originator's published technical bulletin for INCOLOY alloys 945 / 945X, from ASTM B637, and from NACE MR0175 / ISO 15156-3. Forging, size-range and certification information describes the practice of Jiangyin Jiangnan Metal Co., Ltd.

To cite this page:

Jiangyin Jiangnan Metal Co., Ltd. "UNS N09945 Forgings (Incoloy 945): Composition, Properties and Sour-Service Data." steelforgepieces.com, updated 31 August 2026. https://www.steelforgepieces.com/Nickel-Alloy/UNS-N09945.html

References

Special Metals Corporation, INCOLOY alloys 945 / 945X technical bulletin (PDF)
ASTM B637, Precipitation-Hardening and Cold-Worked Nickel Alloy Bars, Forgings and Forging Stock for Moderate or High Temperature Service
ANSI/NACE MR0175 / ISO 15156-3, Cracking-resistant CRAs and other alloys for H₂S-containing environments
NACE TM0177, Laboratory testing of metals for resistance to sulfide stress cracking
ASTM G48, ASTM G36 and ASTM G123, localized and chloride stress-corrosion cracking test methods
EN 10204, Metallic products, types of inspection documents

Maintained by the technical sales team at Jiangyin Jiangnan Metal Co., Ltd. Last reviewed 31 August 2026. Data is given for design guidance and does not replace the governing specification. Confirm all values against the current edition before use.

Trademark notice. INCOLOY® is a registered trademark of Special Metals Corporation. Jiangyin Jiangnan Metal Co., Ltd. is not affiliated with, endorsed by, or a licensee of Special Metals Corporation. We supply forgings manufactured to the UNS N09945 chemistry and property requirements. Trade names appear here only to identify the alloy grade.