GX40NiCrSiNb35-26 (EN 1.4852) Austenitic Stainless Steel Casting Material

Austenitic Stainless Steel

Introduction

GX40NiCrSiNb35-26 is a heat-resistant austenitic stainless steel casting grade covered by EN 10295. Typical family applications include furnace fixtures, support elements and burner-assembly components.

Field	Value
Designation	GX40NiCrSiNb35-26 (EN 1.4852)
Material Type	Stainless Steel
Sub Type	Austenitic Stainless Steel
Product Form	casting

Manufacturing Process

Investment Casting
Shell Molding Casting
Sand Casting

Equivalent Materials

N/A

Similar Materials

N/A

Reference Standards

Standard	Standard Title	Edition	Specification	Identifier
EN 10295	Heat resistant steel castings	2002	GX40NiCrSiNb35-26	—

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Physical Properties

Property	Value / Unit	Note	Source
Density	8.0 kg/dm³		EN 10295
Specific Heat	500 J/(kg·K)	Temperature: 20 °C	EN 10295
Thermal Conductivity	12.8 W/(m·K)	Temperature: 20 °C	EN 10295
Thermal Conductivity	13 W/(m·K)	Temperature: 100 °C	EN 10295
Thermal Conductivity	23.5 W/(m·K)	Temperature: 800 °C	EN 10295
Thermal Conductivity	27.7 W/(m·K)	Temperature: 1000 °C	EN 10295
Thermal Expansion	16 ×10⁻⁶/K	Temperature range: 20–400 °C	EN 10295
Thermal Expansion	17.8 ×10⁻⁶/K	Temperature range: 20–800 °C	EN 10295
Thermal Expansion	18.6 ×10⁻⁶/K	Temperature range: 20–1000 °C	EN 10295

Chemical Composition

Element	EN 10295Edition 2002 · wt.%Cast analysis
C	0.30–0.50
Si	1.00–2.50
Mn	≤ 2.00
P	≤ 0.040
S	≤ 0.030
Cr	24.00–27.00
Ni	33.00–36.00
Mo	≤ 0.50
Cu	≤ 0.25^[1]
Nb	0.80–1.80
V	≤ 0.12^[1]
W	≤ 0.60^[1]
Co	≤ 1.00^[1]

Notes

EN 10295 · Edition 2002

[1] Cu/V/W/Co: Unless otherwise agreed: limit for element unspecified in; no intentional addition except for finishing the heat.

Heat Treatment

EN 10295–2002

N/A

Mechanical Properties

Core Mechanical Properties

EN 10295 — 2002 · Table 2 — Normative

Property	As cast / no heat treatment
Yield Strength	≥ 220 MPa
Tensile Strength	≥ 440 MPa
Elongation	≥ 4 %

Notes

Room temperature

Additional Mechanical Properties

Creep & Stress-Rupture Properties

Property	Value / unit	Temperature / conditions	Nature	Source / edition	Notes
σr — mean rupture stress	155 MPa	Temperature: 700 °C; Load time: 100 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σr — mean rupture stress	120 MPa	Temperature: 700 °C; Load time: 1000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σ1% — mean stress for 1% elongation	72 MPa	Temperature: 700 °C; Load time: 10000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σr — mean rupture stress	90 MPa	Temperature: 800 °C; Load time: 100 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σr — mean rupture stress	70 MPa	Temperature: 800 °C; Load time: 1000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σ1% — mean stress for 1% elongation	41 MPa	Temperature: 800 °C; Load time: 10000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σr — mean rupture stress	49 MPa	Temperature: 900 °C; Load time: 100 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σr — mean rupture stress	38 MPa	Temperature: 900 °C; Load time: 1000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σ1% — mean stress for 1% elongation	22 MPa	Temperature: 900 °C; Load time: 10000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σr — mean rupture stress	30 MPa	Temperature: 1000 °C; Load time: 100 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σr — mean rupture stress	20 MPa	Temperature: 1000 °C; Load time: 1000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σ1% — mean stress for 1% elongation	9 MPa	Temperature: 1000 °C; Load time: 10000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σr — mean rupture stress	15 MPa	Temperature: 1100 °C; Load time: 100 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σr — mean rupture stress	8.3 MPa	Temperature: 1100 °C; Load time: 1000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.
σ1% — mean stress for 1% elongation	3 MPa	Temperature: 1100 °C; Load time: 10000 h	Informative	EN 10295–2002 · EN 10295:2002, Annex B, Table B.1 (informative)	Mean values; ±20% scatter band; information only, not acceptance requirements; Mean creep values from a scatter band of ±20%; information only.

Welding Conditions

N/A

Applications

Austenitic stainless steel EN 10295 GX40NiCrSiNb35-26 is typically used for oil and gas plant cast components. EN 10295:2002 gives an informative maximum use temperature in air of 1100 °C, based on oxidation resistance in clean natural air. These figures are not guaranteed continuous or intermittent service temperatures, or allowable temperatures under load; other atmospheres require separate assessment.

Other cast components used in this material family include furnace fixtures, support elements and burner-assembly components. These applications include industrial heating and heat-treatment equipment. Atmosphere, loading, direct flame exposure, cyclic operation and process deposits must be considered separately from an in-air reference temperature.

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Last Updated: November 6, 2026

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