GX4CrNiN26-7 (EN 1.4347) Duplex Stainless Steel Casting Material
Duplex Stainless Steel
Introduction
GX4CrNiN26-7 (EN 1.4347) is a duplex stainless steel casting grade specified in EN 10283. The standard covers corrosion-resistant castings for general purposes and defines the applicable delivery conditions and engineering requirements. Casting process options include Investment Casting, Shell Molding Casting and Sand Casting, subject to the applicable specification and component requirements.
| Field | Value |
|---|---|
| Designation | GX4CrNiN26-7 (EN 1.4347) |
| Material Type | Stainless Steel |
| Sub Type | Duplex Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Grades
N/A
Similar Materials
N/A
Reference Standards
| Standard | Standard Title | Edition | Specification | Identifier |
|---|---|---|---|---|
| EN 10283 | Corrosion resistant steel castings | 2019 | GX4CrNiN26-7 | — |
Related Casting Products
Physical Properties
EN 10283–2019
| Property | Value | Note |
|---|---|---|
| Density | 7.7 kg/dm³ | Test at 20 °C |
| Specific Heat | 500 J/(kg·K) | Test at 20 °C |
| Thermal Conductivity | 15 W/(m·K) | Test at 50 °C |
| Thermal Expansion | 12.5 ×10⁻⁶/K | Temperature range: 20–100 °C |
| Thermal Expansion | 13.5 ×10⁻⁶/K | Temperature range: 20–300 °C |
| Thermal Expansion | 14.5 ×10⁻⁶/K | Temperature range: 20–500 °C |
Chemical Composition
| Element | EN 10283Edition 2019 · wt.%Cast analysis |
|---|---|
| C | ≤ 0.05 |
| Si | ≤ 1.50 |
| Mn | ≤ 1.50 |
| P | ≤ 0.035 |
| S | ≤ 0.020 |
| Cr | 25.00–27.00 |
| Ni | 5.50–7.50 |
| Cu | ≤ 0.50[1] |
| N | 0.10–0.20 |
Notes
EN 10283 · Edition 2019
[1] Cu: Applies unless otherwise agreed; unspecified elements shall not be intentionally added without purchaser agreement except for finishing the heat.
Heat Treatment
EN 10283–2019 · +AT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | solution annealing | 1040–1140 °C | water |
Mechanical Properties
| Property | EN 10283Edition 2019[1] |
|---|---|
| Yield Strength (Rp0.2) | ≥ 420 MPa |
| Tensile Strength | ≥ 590 MPa |
| Elongation | ≥ 20 % |
| Impact Energy | ≥ 30 J[2] |
Notes
EN 10283 · Edition 2019
[1] All properties in this column: wall thickness ≤ 150 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.
[2] 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; Air quenching may be agreed for very small, thin castings according to corrosion conditions. With low preheat and interpass temperatures (≤150 °C), post-weld heat treatment may be suppressed by agreement.
[3] Post-weld Heat Treatment: major welds; Air quenching may be agreed for very small, thin castings according to corrosion conditions.
Applications
Typical applications for this corrosion-resistant steel casting family include components exposed to corrosive environments in general engineering service.
Last Updated: October 13, 2026