GX4CrNiN26-7 (EN 1.4347) Duplex Stainless Steel Casting Material
Duplex Stainless Steel
Introduction
GX4CrNiN26-7 is a duplex stainless steel casting grade covered by EN 10283. Typical family applications include pump casings, impellers, covers and valve bodies.
| 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 Materials
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
| Property | Value / Unit | Note | Source |
|---|---|---|---|
| Density | 7.7 kg/dm³ | Test at 20 °C | EN 10283 |
| Specific Heat | 500 J/(kg·K) | Test at 20 °C | EN 10283 |
| Thermal Conductivity | 15 W/(m·K) | Test at 50 °C | EN 10283 |
| Thermal Expansion | 12.5 ×10⁻⁶/K | Temperature range: 20–100 °C | EN 10283 |
| Thermal Expansion | 13.5 ×10⁻⁶/K | Temperature range: 20–300 °C | EN 10283 |
| Thermal Expansion | 14.5 ×10⁻⁶/K | Temperature range: 20–500 °C | EN 10283 |
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
Core Mechanical Properties
EN 10283 — 2019 · Table 2 — Normative
| Property | +AT |
|---|---|
| Yield Strength (Rp0.2) | ≥ 420 MPa |
| Tensile Strength | ≥ 590 MPa |
| Elongation | ≥ 20 % |
| Impact Energy | ≥ 30 J[1] |
- 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.
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; 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
Duplex stainless steel EN 10283 GX4CrNiN26-7 belongs to a corrosion-resistant steel casting family typically used for components exposed to corrosive environments in general engineering service. Other cast components used in this material family include pump casings, impellers, covers and valve bodies. Applications include water treatment, chemical processing, selected marine systems, desalination and pulp-and-paper pumping equipment.
The appropriate duplex grade depends on the actual water chemistry and operating conditions.
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Email Us for a QuoteLast Updated: November 6, 2026