GX25CrNiSi18-9 (EN 1.4825) Austenitic Stainless Steel Casting Material
Austenitic Stainless Steel
Introduction
GX25CrNiSi18-9 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 | GX25CrNiSi18-9 (EN 1.4825) |
| 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 | GX25CrNiSi18-9 | — |
Related Casting Products
Physical Properties
| Property | Value / Unit | Note | Source |
|---|---|---|---|
| Density | 7.8 kg/dm³ | EN 10295 | |
| Specific Heat | 500 J/(kg·K) | Temperature: 20 °C | EN 10295 |
| Thermal Conductivity | 14.8 W/(m·K) | Temperature: 20 °C | EN 10295 |
| Thermal Conductivity | 15.5 W/(m·K) | Temperature: 100 °C | EN 10295 |
| Thermal Conductivity | 26 W/(m·K) | Temperature: 800 °C | EN 10295 |
| Thermal Conductivity | 30 W/(m·K) | Temperature: 1000 °C | EN 10295 |
| Thermal Expansion | 17.4 ×10⁻⁶/K | Temperature range: 20–400 °C | EN 10295 |
| Thermal Expansion | 18.3 ×10⁻⁶/K | Temperature range: 20–800 °C | EN 10295 |
| Thermal Expansion | 18.8 ×10⁻⁶/K | Temperature range: 20–1000 °C | EN 10295 |
Chemical Composition
| Element | EN 10295Edition 2002 · wt.%Cast analysis |
|---|---|
| C | 0.15–0.35 |
| Si | 0.50–2.50 |
| Mn | ≤ 2.00 |
| P | ≤ 0.040 |
| S | ≤ 0.030 |
| Cr | 17.00–19.00 |
| Ni | 8.00–10.00 |
| Mo | ≤ 0.50 |
| Cu | ≤ 0.25[1] |
| Nb | ≤ 0.60[1] |
| V | ≤ 0.12[1] |
| W | ≤ 0.60[1] |
| Co | ≤ 1.00[1] |
Notes
EN 10295 · Edition 2002
[1] Cu/Nb/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 | ≥ 230 MPa |
| Tensile Strength | ≥ 450 MPa |
| Elongation | ≥ 15 % |
- Room temperature
Additional Mechanical Properties
Creep & Stress-Rupture Properties
| Property | Value / unit | Temperature / conditions | Nature | Source / edition | Notes |
|---|---|---|---|---|---|
| σr — mean rupture stress | 220 MPa | Temperature: 600 °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 | 78 MPa | Temperature: 600 °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 | 120 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 | 90 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 | 44 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 | 60 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 | 50 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 | 22 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 | 40 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 | 30 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 | 9 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. |
Welding Conditions
N/A
Applications
Austenitic stainless steel EN 10295 GX25CrNiSi18-9 is typically used for furnace supports and beams. EN 10295:2002 gives an informative maximum use temperature in air of 900 °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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Email Us for a QuoteLast Updated: November 6, 2026