G-NiCr50Nb (EN 2.4680) Nickel-Chromium Alloy Casting Material

Nickel-Chromium Alloy

Introduction

G-NiCr50Nb is a nickel-chromium alloy grade covered by EN 10295. Typical applications include heat-resistant cast components.

Field	Value
Designation	G-NiCr50Nb (EN 2.4680)
Material Type	Nickel Alloy
Sub Type	Nickel-Chromium Alloy
Product Form	casting

Manufacturing Process

Sand Casting
Investment Casting

Equivalent Materials

N/A

Similar Materials

N/A

Reference Standards

Standard	Standard Title	Edition	Specification	Identifier
EN 10295	Heat resistant steel castings	2002	G-NiCr50Nb	—

Related Casting Products

Mechanical Accessories Casting

Motor casting part – Aluminium Impeller

Physical Properties

Property	Value / Unit	Note	Source
Density	8.0 kg/dm³		EN 10295
Specific Heat	450 J/(kg·K)	Temperature: 20 °C	EN 10295
Thermal Conductivity	14.2 W/(m·K)	Temperature: 20 °C	EN 10295
Thermal Expansion	13 ×10⁻⁶/K	Temperature range: 20–400 °C	EN 10295
Thermal Expansion	15 ×10⁻⁶/K	Temperature range: 20–800 °C	EN 10295
Thermal Expansion	15 ×10⁻⁶/K	Temperature range: 20–1000 °C	EN 10295

Chemical Composition

Element	EN 10295Edition 2002 · wt.%Cast analysis
C	≤ 0.10
Si	≤ 1.00
Mn	≤ 0.50
P	≤ 0.020
S	≤ 0.020
Cr	48.00–52.00
Ni	balance
Fe	≤ 1.00
Mo	≤ 0.50
Co	≤ 1.00^[1]
W	≤ 0.60^[1]
Nb	1.00–1.80
Cu	≤ 0.25^[1]
N	≤ 0.16
V	≤ 0.12^[1]

Notes

EN 10295 · Edition 2002

[1] Co/W/Cu/V: 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	≥ 230 MPa
Tensile Strength	≥ 540 MPa
Elongation	≥ 8 %

Notes

Room temperature

Additional Mechanical Properties

Creep & Stress-Rupture Properties

Property	Value / unit	Temperature / conditions	Nature	Source / edition	Notes
σr — mean rupture stress	170 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	110 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	71 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	105 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	38 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	60 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	18 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	15 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	6.8 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	6 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.

Welding Conditions

N/A

Applications

Nickel-chromium alloy EN 10295 G-NiCr50Nb is used for heat-resistant cast components. EN 10295:2002 gives an informative maximum use temperature in air of 1050 °C, based on oxidation resistance in clean natural air. The separate oil-ash guidance is 950 °C. 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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