Nickel-base superalloy · Open-die forgings

NCK19DTA Forgings

Q: Is NCK19DTA the same as Rene 41?

Yes. NCK19DTA, Rene 41, UNS N07041 and Werkstoff No. 2.4973 all describe the same base alloy under different national and industry designation systems. Individual specifications set slightly different limits, so the specification named on the purchase order is the one that governs.

Q: What is the chemical composition of NCK19DTA?

NCK19DTA contains 18.0 to 20.0% chromium, 10.0 to 12.0% cobalt, 9.0 to 10.5% molybdenum, 3.0 to 3.3% titanium, 1.40 to 1.80% aluminium and 0.003 to 0.010% boron, with carbon to 0.12% max, iron to 5.0% max and nickel as the balance.

Q: What heat treatment does NCK19DTA require?

Two stages. Solution treatment at 1,065 to 1,080 C (1,950 to 1,975 F) for about 4 hours, air cooled or water quenched. Then ageing at 760 C (1,400 F) for about 16 hours, air cooled. Jiangyin Jiangnan Metal Co., Ltd. runs both stages in-house and supplies the chart record with the forging.

Q: What is the maximum service temperature of NCK19DTA?

Useful strength holds to roughly 980 C (1,800 F), and oxidation resistance, including resistance to jet combustion gases, runs to about the same figure. The alloy is at its most useful in the 650 to 980 C band, which is the reason it turns up in jet engine hot sections and gas turbines.

René 41 · UNS N07041 · W.-Nr. 2.4973

NCK19DTA is the AFNOR designation for René 41, a nickel-base precipitation-hardening superalloy also listed as UNS N07041 and Werkstoff No. 2.4973. Nickel, chromium, cobalt and molybdenum make up the base, with aluminium and titanium added to form a gamma-prime Ni₃(Al,Ti) precipitate. That precipitate is what carries the strength, from room temperature up to roughly 980 °C (1,800 °F).

Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory in Jiangyin, Jiangsu Province, China. We forge NCK19DTA to customer drawing: seamless rolled rings, forged rings, flanges, round bars, discs, sleeves, bushings, tube sheets, shafts and hollow forgings. Every piece ships with an EN 10204 3.1 or 3.2 certificate.

Material identification · cross-reference

Grade: NCK19DTA
Common name: René 41
UNS: N07041
Werkstoff: 2.4973
Type: Ni-Cr-Co-Mo, PH
Forms: Open-die forgings

Last reviewed 22 August 2026 · Technical Department, Jiangyin Jiangnan Metal Co., Ltd.

Summary

NCK19DTA key data

Alloy family: Nickel-base superalloy, precipitation hardening
Strengthening: Gamma prime Ni₃(Al,Ti)
Service range: 650 to 980 °C (1,200 to 1,800 °F)
Tensile strength: 1,420 MPa min (206 ksi), aged
Yield strength: 1,065 MPa min (154 ksi), aged
Hardness: About 40 HRC, aged
Key specs: AMS 5712, AMS 5713
Certification: EN 10204 3.1 / 3.2
Manufacturer: Jiangyin Jiangnan Metal Co., Ltd.

Section 01

What is NCK19DTA equivalent to?

NCK19DTA is the French AFNOR code for René 41. Drawings and purchase orders reach us under any of the designations listed below. They all describe the same base alloy, and we forge to whichever specification the order names.

Table 1. NCK19DTA designation cross-reference (René 41 / UNS N07041), as used by Jiangyin Jiangnan Metal Co., Ltd.
Standard or system	Designation
AFNOR (France)	NCK19DTA, also written NC19KDT; PER 41
Common trade name	René 41 (Rene 41)
UNS	N07041
Werkstoff / EN number	2.4973
DIN chemical name	NiCr19Co11Mo10Ti, NiCr20Co11Mo10TiAl
AISI	683
SAE AMS, bars, forgings, rings	AMS 5712 (solution treated); AMS 5713 (vacuum melted, solution and precipitation treated)
SAE AMS, sheet, strip, plate	AMS 5545
SAE AMS, welding wire	AMS 5800
GE specifications	B50T59, B50TF76C, B50TF109C
Other supplier names	Haynes R-41, Pyromet Alloy 41, Udimet R41, Alloy R41

Cross-references are for identification. Chemistry and property limits vary slightly between specifications, so the specification and revision on your purchase order governs.

Section 02

Chemical composition of NCK19DTA

Composition limits below are in weight percent, taken from AMS 5712 and AMS 5713. We melt NCK19DTA by EAF + VOD + ESR. If your specification calls for vacuum-melted material under AMS 5713, say so at enquiry stage and we will quote against the correct melt source.

Table 2. Chemical composition of NCK19DTA (René 41) forgings supplied by Jiangyin Jiangnan Metal Co., Ltd., weight %
Element	Symbol	Min (%)	Max (%)
Nickel	Ni	Balance
Chromium	Cr	18.00	20.00
Cobalt	Co	10.00	12.00
Molybdenum	Mo	9.00	10.50
Titanium	Ti	3.00	3.30
Aluminium	Al	1.40	1.80
Iron	Fe	—	5.00
Boron	B	0.003	0.010
Carbon	C	—	0.12
Silicon	Si	—	0.50
Copper	Cu	—	0.50
Manganese	Mn	—	0.10
Sulphur	S	—	0.015

Ladle analysis is reported on every EN 10204 3.1 certificate. Product analysis on request.

Section 03

Mechanical properties of NCK19DTA forgings

Room-temperature minimums for NCK19DTA in the solution treated and aged condition. These are the values Jiangyin Jiangnan Metal Co., Ltd. certifies on forged rings, bars and discs unless the customer specification states otherwise.

Table 3. Room-temperature mechanical properties, NCK19DTA solution treated and aged
Property	Metric	Imperial
Tensile strength, min	1,420 MPa	206,000 psi
Yield strength (0.2 % offset), min	1,065 MPa	154,000 psi
Elongation on 4D, min	14 %	14 %
Hardness, typical	40 HRC	40 HRC

Reduction of area is measured and reported on the test certificate. Material supplied in the solution treated condition, for further forming or machining, is lower in strength and higher in ductility; values on request.

Physical properties

Table 4. Typical physical properties of NCK19DTA (René 41)
Property	Value
Density	8.25 g/cm³ (0.298 lb/in³)
Melting range	about 1,315 to 1,370 °C (2,400 to 2,500 °F)
Useful strength range	650 to 980 °C (1,200 to 1,800 °F)
Oxidation resistance	to about 980 °C (1,800 °F)

Section 04

Heat treatment and hot working of NCK19DTA

Strength comes from two stages. Solution treatment dissolves the gamma-prime precipitate. Ageing puts it back as a fine, even distribution. Both stages run in-house at Jiangyin Jiangnan Metal Co., Ltd. on furnaces with calibrated, chart-recorded temperature control.

Table 5. Typical heat treatment cycle for NCK19DTA forgings
Stage	Temperature	Time	Cooling
Solution treatment	1,065 to 1,080 °C (1,950 to 1,975 °F)	about 4 h	Air cool or water quench
Ageing (precipitation)	760 °C (1,400 °F)	about 16 h	Air cool

Cycles are indicative. The cycle actually used is set by the specification and the section thickness, and the chart record goes out with the forging.

Forging practice

Hot working runs from about 1,120 °C down to about 1,000 °C (2,050 to 1,830 °F), with reheats to suit the section.
The forging window is narrow. Press capacity, die temperature and the reduction schedule are planned per part before the first billet goes into the furnace.
Finish forging is followed by full solution treatment, then ageing, so the grain structure is right through the section and not just at the surface.

Welding

NCK19DTA is sensitive to strain-age cracking because of the aluminium and titanium content. Weld in the solution treated condition, then solution treat again before ageing. AMS 5800 is the usual filler wire. Tell us at enquiry stage if the part is welded or may need weld repair, so the sequence can be agreed before production starts.

Section 05

NCK19DTA forged product forms and sizes

Jiangyin Jiangnan Metal Co., Ltd. forges NCK19DTA to drawing in the forms below. Nothing is held in stock, so send a drawing or a dimensioned sketch and we will confirm feasibility, weight and price.

Table 6. NCK19DTA forged product forms and typical size ranges, Jiangyin Jiangnan Metal Co., Ltd.
Product form	Typical size range
Seamless rolled rings	OD 150 to 1,500 mm; height to 600 mm
Open-die forged rings	OD to 2,000 mm; wall to drawing
Forged flanges	DN 15 to DN 1200, or to drawing
Forged round bars	Ø 20 to 500 mm; length to 4,000 mm
Discs, disks and blanks	Ø 100 to 1,200 mm; thickness 20 to 400 mm
Sleeves, bushings, hollow bars	OD 100 to 1,000 mm; ID from 60 mm
Shafts, spindles, eccentric shafts	Ø 50 to 400 mm; length to 4,000 mm
Tube sheets and forged plates	To drawing; thickness to 300 mm
Forged tubes and pipes	Machined from hollow forgings, to drawing
Valve bodies, stems, seat rings, blocks	To drawing
Nozzles, wheels, manifolds, rolls, gears	To drawing
Piece weight	about 5 kg to 3,000 kg

Delivery condition: as-forged, heat treated, rough machined or finish machined. Sizes outside these ranges are often possible, so ask.

Section 06

Where NCK19DTA forgings are used

NCK19DTA is specified for parts that stay loaded at temperature. The list below covers the parts we forge in this grade.

Aerospace and propulsion

Jet engine hot components, turbine wheels and discs
Combustion chamber liners, afterburner parts, casings
Missile and rocket engine components
Structural hardware, bolting and springs

Oil, gas and offshore

Subsea and deepwater production systems
Wellhead and Christmas tree components
Ball, gate, globe, check and plug valve parts: bodies, stems, seat rings, blocks

Power generation

Gas turbine components, land and marine
Industrial air compressors and power generators
Nitrogen generators

Chemical and process plant

Pressure vessels, air receivers, shell-and-tube heat exchangers
Columns, towers, tanks, silos, preheaters, process modules
Chemical pumps and plunger pumps, crystallizer equipment

Heavy industry and marine

Shipbuilding and heavy machinery
Pulp and paper equipment
Pharmaceutical and biochemical processing equipment

Section 07

Testing, inspection and certification

Testing follows the standards named on the order. Ultrasonic testing is carried out to EN 10228-3, SEP 1921 or ASTM A388. Certificates are issued to EN 10204 3.1, or to EN 10204 3.2 with a third party witnessing.

Table 7. Standard and optional testing for NCK19DTA forgings
Test	Standard or basis	Supply
Chemical analysis	Spectrographic, ladle analysis	Standard
Tensile test	Per applicable specification	Standard
Hardness test	HRC or HBW	Standard
Ultrasonic testing	EN 10228-3, SEP 1921, ASTM A388	Standard
Dimensional inspection	Against customer drawing	Standard
Liquid penetrant testing	ASTM E1417	On request
Grain size and microstructure	ASTM E112, macro and micro examination	On request
Positive material identification	PMI, portable XRF or OES	On request
Impact test	Charpy V-notch, per specification	On request
Material certificate	EN 10204 3.1; EN 10204 3.2 with third party	Standard / on request

Section 08

How to request a quotation for NCK19DTA forgings

Send a drawing or the finished dimensions to sales@steelforgepieces.com, or message +86 189 2135 9659 on WhatsApp or WeChat. Cover the eight points below and we can price the job on the first pass.

Drawing or dimensions. Finished size, machining allowance and tolerances.
Quantity. A single prototype piece or a production lot.
Specification and revision. AMS 5712 Rev. K, for example, or your own works standard.
Delivery condition. As-forged, heat treated, rough machined or finish machined.
Heat treatment condition. Solution treated, or solution treated and aged.
NDT requirements. UT standard and acceptance class, LPI, anything else.
Certificate type. EN 10204 3.1 or 3.2, and any third party to witness.
Destination and Incoterm. Port of discharge, FOB / CIF / DAP, required date.

Shipments consolidate through Jiangyin, Zhangjiagang and Shanghai ports. Quotations normally go back within one working day.

Section 09

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. We forge carbon steel, alloy steel, tool steel, stainless steel and nickel-base superalloys, NCK19DTA among them, into seamless rolled rings, forged rings, flanges, round bars, discs, sleeves, bushings, tube sheets, shafts and hollow forgings. Everything is made to drawing and shipped worldwide.

Table 8. Supplier details for NCK19DTA forgings
Item	Detail
Company	Jiangyin Jiangnan Metal Co., Ltd.
Type	Open-die forging factory, manufacturer rather than trader
Address	No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China
Telephone / WhatsApp	+86 189 2135 9659
Email	sales@steelforgepieces.com
Website	www.steelforgepieces.com
Materials	Nickel alloys, stainless steel, alloy steel, tool steel, carbon steel
Markets served	Worldwide

Section 10

Frequently asked questions about NCK19DTA

What is NCK19DTA?

NCK19DTA is a nickel-base precipitation-hardening superalloy holding roughly 19 % chromium, 11 % cobalt and 10 % molybdenum, with aluminium and titanium additions. It is the AFNOR designation for the alloy usually called René 41. Strength holds up between 650 °C and 980 °C (1,200 to 1,800 °F).

Is NCK19DTA the same as René 41?

Yes. NCK19DTA, René 41, UNS N07041 and Werkstoff No. 2.4973 all describe the same base alloy under different national and industry designation systems. Individual specifications set slightly different limits, so the specification named on the purchase order is the one that governs.

What is the chemical composition of NCK19DTA?

NCK19DTA contains 18.0 to 20.0 % chromium, 10.0 to 12.0 % cobalt, 9.0 to 10.5 % molybdenum, 3.0 to 3.3 % titanium, 1.40 to 1.80 % aluminium and 0.003 to 0.010 % boron, with carbon to 0.12 % max, iron to 5.0 % max and nickel as the balance.

What are the mechanical properties of NCK19DTA forgings?

Solution treated and aged, NCK19DTA forgings meet a minimum tensile strength of 1,420 MPa (206,000 psi), a minimum 0.2 % offset yield strength of 1,065 MPa (154,000 psi) and a minimum elongation on 4D of 14 %. Hardness typically runs around 40 HRC at room temperature.

What heat treatment does NCK19DTA require?

Two stages. Solution treatment at 1,065 to 1,080 °C (1,950 to 1,975 °F) for about 4 hours, air cooled or water quenched. Then ageing at 760 °C (1,400 °F) for about 16 hours, air cooled. Jiangyin Jiangnan Metal Co., Ltd. runs both stages in-house and supplies the chart record with the forging.

What is the maximum service temperature of NCK19DTA?

Useful strength holds to roughly 980 °C (1,800 °F), and oxidation resistance, including resistance to jet combustion gases, runs to about the same figure. The alloy is at its most useful in the 650 to 980 °C band, which is the reason it turns up in jet engine hot sections and gas turbines.

Can NCK19DTA be welded?

Yes, with care. Aluminium and titanium content makes the alloy prone to strain-age cracking, so welding is normally done in the solution treated condition and followed by a further solution treatment before ageing. AMS 5800 filler wire is standard.

Which forged shapes are available in NCK19DTA?

Jiangyin Jiangnan Metal Co., Ltd. forges NCK19DTA into seamless rolled rings, open-die forged rings, flanges, round bars, discs and blanks, sleeves, bushings, hollow bars, shafts and spindles, tube sheets, forged tubes and pipes, valve bodies and stems, nozzles, wheels, manifolds, rolls and gears, all to customer drawing.

What testing and certification are supplied with NCK19DTA forgings?

Chemical analysis, tensile and hardness testing, ultrasonic testing to EN 10228-3, SEP 1921 or ASTM A388, and dimensional inspection are standard. Liquid penetrant testing, grain size examination, PMI and impact testing are available on request. Certificates are issued to EN 10204 3.1, or to EN 10204 3.2 with a third party witnessing.

Who manufactures NCK19DTA forgings in China?

Jiangyin Jiangnan Metal Co., Ltd. manufactures NCK19DTA (René 41) open-die forgings at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. Enquiries go to sales@steelforgepieces.com or +86 189 2135 9659, and quotations normally go back within one working day.

Is there a minimum order quantity for NCK19DTA forgings?

No fixed minimum. Since every piece is forged to drawing, we quote single prototype forgings as readily as production lots. Lead time depends on size, melt availability and the heat-treat schedule, and it is confirmed with the quotation.

How is the price of an NCK19DTA forging calculated?

Price follows input weight rather than finished weight, so the forging envelope and the machining allowance matter as much as the final dimensions. Send the drawing, quantity, specification, delivery condition and required certificate, and we price against that package.

Section 11

Related nickel alloy grades we forge

If NCK19DTA is not the grade on your drawing, these related nickel-base alloys are also forged at Jiangyin Jiangnan Metal Co., Ltd.:

Related forged product pages

Technical note. Data on this page is typical, published for identification and general engineering guidance, and is not design data. Property limits vary between specifications and between product forms and section sizes. The specification, revision and acceptance criteria stated on the purchase order govern the supplied material. Compiled and reviewed by the Technical Department, Jiangyin Jiangnan Metal Co., Ltd., 22 August 2026.