What is the difference between 1.4876 Alloy 800, 800H and 800HT?

All three share the same nickel-chromium-iron base. Alloy 800 (N08800) is the general-purpose grade for service to about 816 degrees Celsius. Alloy 800H (N08810) restricts carbon to 0.05 to 0.10 percent and requires a coarse grain size of ASTM 5 or coarser after high-temperature solution annealing, which roughly doubles creep-rupture strength above 816 degrees Celsius. Alloy 800HT (N08811) adds a controlled combined aluminium plus titanium content of 0.85 to 1.20 percent for the highest creep and stress-rupture strength. For forgings that will operate above 600 degrees Celsius under load, Jiangyin Jiangnan Metal recommends dual-certified 800H/800HT.

What testing and certification is supplied with 1.4876 forgings?

Every 1.4876 forging is ultrasonically tested to EN 10228-3, SEP 1921 or ASTM A388 as agreed, with chemical analysis, tensile testing, hardness testing, grain size determination and intergranular corrosion testing available. Documentation is issued as an EN 10204 3.1 inspection certificate, or as an EN 10204 3.2 certificate countersigned by a third party such as TUV, SGS, BV, Lloyd's Register or DNV.

No. 1.4876 has a stable austenitic structure across its whole service range and is essentially non-magnetic in the solution-annealed condition, with a relative permeability close to 1.0. Heavy cold work can produce a very small permeability increase. Its nickel content of 30 to 34 percent prevents the strain-induced martensite that makes cold-worked 300-series stainless steels slightly magnetic.

1.4876 Forgings: X10NiCrAlTi32-21 / Alloy 800H / UNS N08810

Q: What is the chemical composition of 1.4876?

Per EN 10095, 1.4876 contains carbon 0.10 percent max, silicon 1.00 percent max, manganese 1.50 percent max, phosphorus 0.030 percent max, sulphur 0.015 percent max, chromium 19.0 to 23.0 percent, nickel 30.0 to 34.0 percent, aluminium 0.15 to 0.60 percent, titanium 0.15 to 0.60 percent, copper 0.75 percent max, and iron 39.5 percent minimum as balance. Actual heat analysis is stated on the EN 10204 3.1 or 3.2 mill certificate supplied with every order from Jiangyin Jiangnan Metal Co., Ltd.

Q: What are the mechanical properties of 1.4876 forgings?

In the solution-annealed condition at room temperature, 1.4876 forgings typically meet a 0.2 percent proof strength of at least 170 MPa, a tensile strength of 450 to 680 MPa, elongation A5 of at least 30 percent, and hardness of 192 HB maximum. Elevated-temperature and creep-rupture values are supplied on request.

Q: At what temperature is 1.4876 forged?

Jiangyin Jiangnan Metal forges 1.4876 between 1010 and 1200 degrees Celsius for heavy open-die reduction, with general hot working possible from 870 to 1200 degrees Celsius. Deformation between 540 and 760 degrees Celsius is avoided because chromium carbide precipitation in that band causes sensitisation, and forgings are cooled rapidly through it. After forging the parts are solution annealed, typically at 980 to 1040 degrees Celsius for Alloy 800 and at 1150 to 1180 degrees Celsius for 800H and 800HT to develop the required coarse grain size, then water or air quenched.

Q: Which forged shapes are available in 1.4876?

Jiangyin Jiangnan Metal Co., Ltd. produces 1.4876 as seamless rolled rings, forged rings, forged flanges, round bars, shafts, discs, blanks, sleeves, bushings, tube sheets, hollow bars, valve bodies, valve seat rings, nozzles, gear blanks and custom open-die forgings to drawing. Capacity covers diameters from 100 to 6000 mm, lengths from 100 to 12000 mm and single-piece weights from 10 to 15000 kg, using 1, 3, 6 and 9 ton forging hammers, a 4500 ton hydraulic press and 3 m and 6 m ring rolling mills.

Open-die forged rings, seamless rolled rings, flanges, shafts, discs, bars, sleeves and tube sheets in heat-resistant nickel-iron-chromium alloy 1.4876, manufactured to drawing by Jiangyin Jiangnan Metal Co., Ltd.

EN material no.: 1.4876
EN designation: X10NiCrAlTi32-21
UNS: N08800 / N08810 / N08811
Trade name: Incoloy 800 / 800H / 800HT

1.4876 is the EN material number for X10NiCrAlTi32-21, a heat-resistant austenitic nickel-iron-chromium alloy containing 30 to 34 % nickel, 19 to 23 % chromium and a minimum of 39.5 % iron, with controlled additions of 0.15 to 0.60 % aluminium and 0.15 to 0.60 % titanium. It is the European equivalent of Alloy 800, 800H and 800HT (UNS N08800, N08810 and N08811), widely sold under the trade name Incoloy 800, and is specified in EN 10095, EN 10028-7, DIN 17460 and ASTM B564. The alloy resists oxidation, carburisation and nitriding to about 1100 °C, holds useful creep strength at temperature, and does not suffer chloride stress-corrosion cracking.

Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China, employing 460 staff including 9 senior engineers and 32 intermediate engineers. It forges 1.4876 to customer drawing in diameters from 100 mm to 6000 mm, lengths to 12,000 mm and single-piece weights from 10 kg to 15,000 kg, on 1, 3, 6 and 9 ton hammers, a 4500 ton hydraulic press and 3 m and 6 m ring rolling mills. Every part is ultrasonically tested and shipped with an EN 10204 3.1 or third-party 3.2 certificate. Send a drawing to sales@steelforgepieces.com or call +86 189 2135 9659.

1.4876 key data

Alloy family: Nickel-iron-chromium heat-resistant alloy, fully austenitic, non-magnetic
Nominal chemistry: 32 % Ni, 21 % Cr, balance Fe, with Al and Ti additions
Governing standards: EN 10095, EN 10028-7, DIN 17460, SEW 470, ASTM B564 (forgings), ASTM B408 (bar)
Room-temperature strength: Rp0.2 ≥ 170 MPa, Rm 450 to 680 MPa, A5 ≥ 30 %, ≤ 192 HB
Max. continuous service: About 816 °C as Alloy 800; specify 800H or 800HT above 816 °C
Scaling resistance in air: To approximately 1100 °C
Forging temperature: 1010 to 1200 °C for heavy reduction; avoid 540 to 760 °C
Melting route: EAF plus VOD, ESR remelted, or VIM plus ESR plus VAR for critical parts
Forged forms produced: Rolled rings, forged rings, flanges, shafts, discs, bars, sleeves, bushings, tube sheets, hollow bars, valve components, nozzles, gear blanks
Size range: Diameter 100 to 6000 mm, length to 12,000 mm, 10 to 15,000 kg per piece
Testing: UT to EN 10228-3, SEP 1921 or ASTM A388, PT, tensile, hardness, grain size, IGC
Certification: EN 10204 3.1 mill certificate, or 3.2 witnessed by TUV, SGS, BV, LR or DNV
Manufacturer: Jiangyin Jiangnan Metal Co., Ltd., Jiangyin City, Jiangsu Province, China

1.4876 equivalent grades and designations

1.4876 turns up in tender documents under a dozen names, because European, American and proprietary naming systems all cover the same nickel-iron-chromium chemistry. The table below is the cross-reference our sales office uses when converting an enquiry into a forging order.

Table 1. 1.4876 cross-reference to international standards and trade names
System	Designation	Notes
EN material number	1.4876	Werkstoff-Nr. used across EN 10095 and EN 10028-7
EN name	X10NiCrAlTi32-21	Written X10NiCrAlTi32-20 in older DIN documents
UNS, standard grade	N08800	Alloy 800, general purpose to about 816 °C
UNS, high-carbon grade	N08810	Alloy 800H, C 0.05 to 0.10 %, grain size ASTM 5 or coarser
UNS, creep grade	N08811	Alloy 800HT, Al plus Ti controlled to 0.85 to 1.20 %
Trade names	Incoloy 800 / 800H / 800HT, Nicrofer 3220, Cronifer 3220, Sanicro 31H, Alloy AN1	Same chemistry, different producers
Former DIN	DIN 17460, SEW 470	Superseded by EN 10095
Forging specification	ASTM B564, ASME SB-564	Nickel alloy forgings, the usual order specification
Bar specification	ASTM B408, ASME SB-408	Nickel-iron-chromium rod and bar

Related grades we forge: Incoloy 800, Incoloy 800H, Incoloy 800HT, Incoloy 825, Inconel 617, Incoloy 803.

Chemical composition of 1.4876

Below is the specified composition of 1.4876 to EN 10095. Every forging leaves the works with a ladle and product analysis printed on its EN 10204 certificate, and that certificate governs acceptance.

Table 2. 1.4876 / X10NiCrAlTi32-21 chemical composition, % by mass (EN 10095)
Element	Symbol	Minimum %	Maximum %
Carbon	C	—	0.10
Silicon	Si	—	1.00
Manganese	Mn	—	1.50
Phosphorus	P	—	0.030
Sulphur	S	—	0.015
Chromium	Cr	19.00	23.00
Nickel	Ni	30.00	34.00
Aluminium	Al	0.15	0.60
Titanium	Ti	0.15	0.60
Copper	Cu	—	0.75
Iron	Fe	39.50	Balance

For the 800H variant, carbon is restricted to 0.05 to 0.10 % and grain size must be ASTM 5 or coarser. For 800HT, combined aluminium plus titanium is held between 0.85 % and 1.20 %. Dual-certified 800H/800HT forgings satisfying both windows are available on request.

Mechanical properties of 1.4876 forgings

Values apply to solution-annealed forgings tested at room temperature. Elevated-temperature yield, tensile and 100,000-hour creep-rupture data are available on request for design calculations.

Table 3. 1.4876 minimum mechanical properties, solution annealed, 20 °C
Property	Symbol	Value	Unit
0.2 % proof strength	Rp0.2	≥ 170	MPa (N/mm²)
1.0 % proof strength	Rp1.0	≥ 205	MPa (N/mm²)
Tensile strength	Rm	450 to 680	MPa (N/mm²)
Elongation after fracture	A5	≥ 30	%
Brinell hardness	HB	≤ 192	HB
Impact energy, Charpy V	KV	≥ 100	J

Physical properties

Table 4. 1.4876 typical physical properties
Property	Value	Unit
Density	7.94	g/cm³
Melting range	1357 to 1385	°C
Modulus of elasticity at 20 °C	196	GPa
Mean thermal expansion, 20 to 100 °C	14.4	10⁻⁶/K
Thermal conductivity at 20 °C	11.5	W/(m·K)
Specific heat capacity	460	J/(kg·K)
Electrical resistivity at 20 °C	0.99	µΩ·m
Magnetic permeability	≈ 1.0	non-magnetic

How we forge 1.4876

1. Melting and ingot supply

1.4876 is melted by electric arc furnace with vacuum oxygen decarburisation to control carbon, sulphur and gas content. For pressure-retaining, nuclear or rotating parts the ingot is electroslag remelted, which tightens segregation and lifts transverse ductility. A VIM plus ESR plus VAR route is available where the specification calls for it. Ingot chemistry is verified before the first heat.

2. Open-die forging

Heavy reduction runs between 1010 °C and 1200 °C on 1, 3, 6 and 9 ton hammers or the 4500 ton hydraulic press. Lighter hot working is possible down to 870 °C. We keep deformation out of the 540 to 760 °C band, where chromium carbide precipitates on grain boundaries and sensitises the alloy, and parts are moved quickly through that range on cooling. Total reduction ratio is normally held at 4:1 or better, which closes porosity and develops a grain flow that follows the part contour. That grain flow is why forged 1.4876 outlasts material machined from plate in thermal fatigue service.

3. Ring rolling

Seamless rolled rings are produced by upsetting, punching and radial-axial rolling on 3 m and 6 m mills, giving a circumferential grain flow with no weld seam. This is the preferred route for reformer headers, furnace retort rings and turbine casing rings in 1.4876.

4. Heat treatment

Alloy 800 forgings are solution annealed at 980 to 1040 °C and quenched. Alloy 800H and 800HT forgings receive a high-temperature solution anneal at 1150 to 1180 °C to develop the coarse ASTM 5 or coarser grain size that the creep properties depend on. Quenching is rapid through the sensitisation range in water or forced air, depending on section thickness and distortion tolerance.

5. Machining and finish

Forgings are supplied as-forged, proof machined, rough machined with a stock allowance, or finish machined to drawing. 1.4876 work-hardens quickly, so we use positive-rake tooling, rigid setups, heavy feeds and generous coolant, at reduced surface speeds compared with austenitic stainless steel.

1.4876 forged product forms and size ranges

All 1.4876 parts are made to customer drawing. The ranges below reflect our installed open-die and ring rolling capacity. Confirm your specific envelope with the sales office before designing to the limits.

Table 5. 1.4876 forged forms and dimensional capacity
Forged form	Size range	Common use
Seamless rolled rings	OD 80 to 6000 mm on 3 m and 6 m mills	Reformer headers, furnace retorts, casings
Forged rings and hollow bars	OD 100 to 6000 mm, ID from 60 mm	Bushings, liners, spacer rings
Forged flanges	WN, SO, BL and long weld neck to drawing	High-temperature piping, vessel nozzles
Round bars and shafts	Diameter 100 to 1200 mm, length to 12,000 mm	Furnace roller shafts, agitator shafts, fasteners
Discs and blanks	Diameter 100 to 2500 mm	Turbine discs, blind covers, gear blanks
Tube sheets	Diameter to 3500 mm	Shell-and-tube heat exchangers
Sleeves and bushings	OD to 2000 mm	Pump and compressor internals
Valve bodies, seat rings, stems	To drawing	Ball, gate, globe, check and plug valves
Nozzles, elbows, tees, crosses	To drawing	Pressure vessel and piping connections
Single-piece weight	10 kg to 15,000 kg	All forms

Where 1.4876 forgings are used

Engineers specify 1.4876 when a part has to resist oxidation, carburisation and nitriding at high temperature and stay immune to chloride stress-corrosion cracking. Neither 300-series stainless steel nor plain heat-resisting steel covers both requirements.

Petrochemical and refiningEthylene cracker pigtails and headers, steam methane reformer outlet manifolds, transfer line exchanger components, catalyst support grids.
Heat treatment plantFurnace muffles and retorts, roller hearth shafts, radiant tube supports, basket and fixture rings, burner components.
Power generationSuperheater and reheater headers, steam generator components, coal gasification internals, waste-to-energy boiler parts.
NuclearSteam generator tube sheets and support components in the 800H condition, where creep and thermal stability govern.
Chemical processReactor internals, distillation column and tower rings, calciner components, nitric acid and urea plant parts.
Heat exchangersTube sheets, forged shells, channel flanges and girth flanges for shell-and-tube units in aggressive high-temperature service.
Valves and flow controlBodies, bonnets, seat rings, stems and discs for high-temperature ball, gate, globe and check valves.
Rotating equipmentCompressor and turbine discs, spacer rings, labyrinth seals, pump shafts and sleeves for hot gas duty.

Testing, inspection and certification

The mill certificate is part of the deliverable. Standard scope on every 1.4876 order:

Chemical analysis, ladle and product analysis by spectrometer, reported against EN 10095 or the customer specification.
Ultrasonic testing to EN 10228-3, SEP 1921 or ASTM A388, with the acceptance class stated on the order.
Mechanical testing, tensile, elongation, reduction of area, hardness and Charpy V impact, from integral or prolongation test material.
Grain size to ASTM E112. ASTM 5 or coarser is verified for 800H and 800HT forgings.
Intergranular corrosion to ASTM A262 practice E or equivalent when specified.
Surface NDT, liquid penetrant testing to ASTM E165 on machined surfaces where required.
Dimensional report issued against the customer drawing before packing.
Documentation, EN 10204 3.1 as standard, or EN 10204 3.2 countersigned by TUV, SGS, BV, Lloyd's Register or DNV.

PED 2014/68/EU material appraisal, NACE MR0175 and ISO 15156 compliance statements and full heat traceability are available where the end application requires them.

Frequently asked questions about 1.4876

What is material 1.4876?

1.4876 is the EN material number for X10NiCrAlTi32-21, a nickel-iron-chromium heat-resistant alloy containing 30 to 34 % nickel, 19 to 23 % chromium and a minimum of 39.5 % iron, with controlled aluminium and titanium additions of 0.15 to 0.60 % each. It is the European equivalent of Alloy 800, 800H and 800HT, also known as Incoloy 800, and is covered by EN 10095, EN 10028-7 and DIN 17460. Jiangyin Jiangnan Metal Co., Ltd. supplies 1.4876 as open-die forgings including rings, flanges, shafts, discs and bars.

What is 1.4876 equivalent to?

1.4876 is equivalent to Alloy 800 (UNS N08800), Alloy 800H (UNS N08810) and Alloy 800HT (UNS N08811), sold under trade names including Incoloy 800, Nicrofer 3220, Cronifer 3220 and Sanicro 31H. Its EN designation is X10NiCrAlTi32-21 and its former German designation is DIN 17460 and SEW 470. The three UNS grades share the same base chemistry but differ in carbon content and grain size.

What is the difference between Alloy 800, 800H and 800HT?

Alloy 800 (N08800) is the general-purpose grade for service to about 816 °C. Alloy 800H (N08810) restricts carbon to 0.05 to 0.10 % and requires ASTM grain size 5 or coarser after a high-temperature solution anneal, which roughly doubles creep-rupture strength above 816 °C. Alloy 800HT (N08811) additionally controls combined aluminium plus titanium to 0.85 to 1.20 % for the highest creep and stress-rupture strength. For forgings loaded above 600 °C, dual-certified 800H/800HT is the safe specification.

What is the maximum service temperature of 1.4876?

1.4876 in the Alloy 800 condition is used for continuous service to approximately 816 °C. Above that, the 800H or 800HT variants should be specified for their higher creep-rupture strength. The chromium oxide scale gives useful oxidation and scaling resistance in air to roughly 1100 °C, but load-bearing capacity at that temperature is very low, so creep rather than oxidation is normally the limiting factor.

What is the chemical composition of 1.4876?

Per EN 10095: carbon 0.10 % max, silicon 1.00 % max, manganese 1.50 % max, phosphorus 0.030 % max, sulphur 0.015 % max, chromium 19.0 to 23.0 %, nickel 30.0 to 34.0 %, aluminium 0.15 to 0.60 %, titanium 0.15 to 0.60 %, copper 0.75 % max, iron 39.5 % minimum as balance. The actual heat analysis appears on the EN 10204 certificate issued with every order.

What are the mechanical properties of 1.4876 forgings?

Solution annealed and tested at room temperature, 1.4876 forgings meet Rp0.2 ≥ 170 MPa, Rm 450 to 680 MPa, elongation A5 ≥ 30 % and hardness ≤ 192 HB. Elevated-temperature and 100,000-hour creep-rupture curves are supplied on request.

At what temperature is 1.4876 forged?

Heavy open-die reduction is performed between 1010 °C and 1200 °C, with general hot working possible from 870 °C to 1200 °C. Deformation between 540 °C and 760 °C is avoided because chromium carbide precipitation sensitises the alloy in that band, and forgings are cooled rapidly through it. Solution annealing follows at 980 to 1040 °C for Alloy 800, or 1150 to 1180 °C for 800H and 800HT to develop the required coarse grain.

Which forged shapes are available in 1.4876?

Seamless rolled rings, forged rings, flanges, round bars, shafts, discs, blanks, sleeves, bushings, tube sheets, hollow bars, valve bodies and seat rings, nozzles and gear blanks. Capacity covers diameters from 100 mm to 6000 mm, lengths to 12,000 mm and single-piece weights from 10 kg to 15,000 kg.

What testing and certification is supplied?

Every 1.4876 forging is ultrasonically tested to EN 10228-3, SEP 1921 or ASTM A388 as agreed. Chemical analysis, tensile testing, hardness, Charpy impact, grain size to ASTM E112 and intergranular corrosion testing to ASTM A262 are available. Documentation is issued as an EN 10204 3.1 certificate, or a 3.2 certificate countersigned by TUV, SGS, BV, Lloyd's Register or DNV.

Is 1.4876 magnetic?

No. 1.4876 has a stable austenitic structure across its entire service range and is essentially non-magnetic in the solution-annealed condition, with relative permeability close to 1.0. Its 30 to 34 % nickel content prevents the strain-induced martensite that makes cold-worked 300-series stainless steels slightly magnetic.

Can 1.4876 be welded?

Yes. 1.4876 is readily welded by GTAW, SMAW, GMAW and SAW using matching or over-alloyed filler, most commonly ERNiCr-3 (Alloy 82) or ENiCrFe-3 (Alloy 182). Preheat and post-weld heat treatment are not normally required. Interpass temperature and heat input are controlled to limit time spent in the 540 to 760 °C sensitisation range.

Who supplies 1.4876 open-die forgings?

Jiangyin Jiangnan Metal Co., Ltd., an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China, manufactures and exports 1.4876 and Alloy 800H forgings worldwide. The works employs 460 staff including 9 senior engineers and 32 intermediate engineers. Contact +86 189 2135 9659 or sales@steelforgepieces.com.

Request a quotation for 1.4876 forgings

Send a drawing or a dimension list and we return a firm price, forging weight and lead time, normally within 24 hours on working days.

Email the drawing, 3D model or dimensions. For rings state OD, ID and height; for bars state diameter and length.
Confirm the grade, 1.4876 as Alloy 800, 800H or 800HT, and the applicable standard.
State the delivery condition: as-forged, proof machined, rough machined or finish machined.
Specify the UT acceptance class and whether you need an EN 10204 3.1 or third-party 3.2 certificate.

sales@steelforgepieces.com

Phone, WhatsApp, WeChat

+86 189 2135 9659

Factory

Jiangyin Jiangnan Metal Co., Ltd.
No.1 Chengxiqiao Road, Zhouzhuang Town
Jiangyin City, Jiangsu Province 214423
China

Standards referenced on this page

EN 10095, Heat resisting steels and nickel alloys
EN 10028-7, Flat products made of steels for pressure purposes, Part 7: Stainless steels
DIN 17460 and SEW 470, Heat resistant steels (superseded)
ASTM B564 and ASME SB-564, Nickel alloy forgings
ASTM B408 and ASME SB-408, Nickel-iron-chromium alloy rod and bar
EN 10228-3, SEP 1921 and ASTM A388, Ultrasonic testing of forgings
ASTM E112, Determining average grain size
ASTM A262, Detecting susceptibility to intergranular attack
EN 10204, Metallic products: types of inspection documents

Technical data compiled and published by Jiangyin Jiangnan Metal Co., Ltd., open-die forging factory, Jiangyin City, Jiangsu Province, China. Published 18 June 2015. Last reviewed and updated 6 August 2026. Values are typical and given for guidance. The EN 10204 certificate supplied with each order governs acceptance.