GX5CrNiCu16-4 (EN 1.4525) Precipitation-Hardening Stainless Steel Casting Material
Precipitation-Hardening Stainless Steel
Introduction
GX5CrNiCu16-4 is a stainless steel grade covered by EN 10283. Typical family applications include valve bodies, valve discs, compressor impellers, centrifuge components, food-machinery parts and structural and actuator components.
| Field | Value |
|---|---|
| Designation | GX5CrNiCu16-4 (EN 1.4525) |
| Material Type | Stainless Steel |
| Sub Type | Precipitation-Hardening 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 10283 | Corrosion resistant steel castings | 2019 | GX5CrNiCu16-4 | — |
Related Casting Products
Physical Properties
| Property | Value / Unit | Note | Source |
|---|---|---|---|
| Density | 7.8 kg/dm³ | Test at 20 °C; Delivery condition +QT1 | EN 10283 |
| Specific Heat | 460 J/(kg·K) | Test at 20 °C; Delivery condition +QT1 | EN 10283 |
| Thermal Conductivity | 17.5 W/(m·K) | Test at 50 °C; Delivery condition +QT1 | EN 10283 |
| Thermal Conductivity | 18.5 W/(m·K) | Test at 100 °C; Delivery condition +QT1 | EN 10283 |
| Thermal Expansion | 11.8 ×10⁻⁶/K | Delivery condition +QT1; Temperature range: 20–100 °C | EN 10283 |
| Thermal Expansion | 12.8 ×10⁻⁶/K | Delivery condition +QT1; Temperature range: 20–300 °C | EN 10283 |
| Thermal Expansion | 13.4 ×10⁻⁶/K | Delivery condition +QT1; Temperature range: 20–500 °C | EN 10283 |
| Density | 7.8 kg/dm³ | Test at 20 °C; Delivery condition +QT2 | EN 10283 |
| Specific Heat | 460 J/(kg·K) | Test at 20 °C; Delivery condition +QT2 | EN 10283 |
| Thermal Conductivity | 17.5 W/(m·K) | Test at 50 °C; Delivery condition +QT2 | EN 10283 |
| Thermal Conductivity | 18.5 W/(m·K) | Test at 100 °C; Delivery condition +QT2 | EN 10283 |
| Thermal Expansion | 10.6 ×10⁻⁶/K | Delivery condition +QT2; Temperature range: 20–100 °C | EN 10283 |
| Thermal Expansion | 11.3 ×10⁻⁶/K | Delivery condition +QT2; Temperature range: 20–300 °C | EN 10283 |
| Thermal Expansion | 12 ×10⁻⁶/K | Delivery condition +QT2; Temperature range: 20–500 °C | EN 10283 |
Chemical Composition
| Element | EN 10283Edition 2019 · wt.%Cast analysis |
|---|---|
| C | ≤ 0.07 |
| Si | ≤ 0.80 |
| Mn | ≤ 1.00 |
| P | ≤ 0.035 |
| S | ≤ 0.025 |
| Cr | 15.00–17.00 |
| Ni | 3.50–5.50 |
| Mo | ≤ 0.80 |
| Cu | 2.50–4.00 |
| N | ≤ 0.05 |
| Nb | ≤ 0.35 |
| V | ≤ 0.08[1] |
Notes
EN 10283 · Edition 2019
[1] V: Applies unless otherwise agreed; unspecified elements shall not be intentionally added without purchaser agreement except for finishing the heat.
Heat Treatment
EN 10283–2019 · +QT1
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | quenching | 1020–1070 °C | air or liquid |
| 2 | tempering | 560–610 °C | — |
EN 10283–2019 · +QT2
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | quenching | 1020–1070 °C | air or liquid |
| 2 | tempering | 460–500 °C | — |
Mechanical Properties
Core Mechanical Properties
Conditions are not identical. Compare each stated condition and applicability separately.
EN 10283 — 2019 · Table 2 — Normative
| Property | +QT1 | +QT2 |
|---|---|---|
| Yield Strength (Rp0.2) | ≥ 750 MPa | ≥ 1000 MPa |
| Tensile Strength | ≥ 900 MPa | ≥ 1100 MPa |
| Elongation | ≥ 12 % | ≥ 5 % |
| Impact Energy | ≥ 20 J[1] | — / Not specified |
- wall thickness ≤ 300 mm; Test block; maximum thickness 150 mm; Room temperature; Yield and tensile strength also apply to the casting up to the maximum specified wall thickness.
Notes
EN 10283 · Edition 2019
[1] Impact Energy: KV2 as specified in
Welding Conditions
EN 10283–2019
Notes
EN 10283 · Edition 2019
[1] Preheat: Preheat depends on casting geometry, thickness and climatic conditions.
[2] Post-weld Heat Treatment: minor welds
[3] Post-weld Heat Treatment: major welds
Applications
Precipitation-hardening stainless steel EN 10283 GX5CrNiCu16-4 is typically used for high-strength cast structural components and actuators. Other cast components used in this material family include valve bodies, valve discs, compressor impellers, centrifuge components, food-machinery parts and structural and actuator components. Typical settings are industrial machinery and equipment manufacture, including replacement components.
The specified material condition remains important, particularly for rotating or mechanically loaded parts.
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Email Us for a QuoteLast Updated: November 6, 2026