GX2CrNiMoCuN25-6-3-3 (EN 1.4517) Duplex Stainless Steel Casting Material
Duplex Stainless Steel
Introduction
GX2CrNiMoCuN25-6-3-3 is a duplex stainless steel casting grade covered by EN 10213, EN 10283, ISO 11972. Typical family applications include pump casings, impellers, covers and valve bodies.
| Field | Value |
|---|---|
| Designation | GX2CrNiMoCuN25-6-3-3 (EN 1.4517) |
| Material Type | Stainless Steel |
| Sub Type | Duplex Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Materials
| Standard | Material Grade |
|---|---|
| UNS / ACI | J93372 |
Similar Materials
N/A
Reference Standards
| Standard | Standard Title | Edition | Specification | Identifier |
|---|---|---|---|---|
| EN 10213 | Steel castings for pressure purposes | 2007+A1:2016 | GX2CrNiMoCuN25-6-3-3 | EN 1.4517 |
| EN 10283 | Corrosion resistant steel castings | 2019 | GX2CrNiMoCuN25-6-3-3 | EN 1.4517 |
| ISO 11972 | Corrosion-resistant cast steels for general applications | 2023 | GX2CrNiMoCuN25-6-3-3 | EN 1.4517 |
Related Casting Products
Physical Properties
| Property | Value / Unit | Note | Source |
|---|---|---|---|
| Density | 7.7 kg/dm³ | Test at 20 °C | EN 10213; EN 10283 |
| Thermal Expansion | 13 ×10⁻⁶/K | Temperature range: 20–100 °C | EN 10213 |
| Thermal Expansion | 14 ×10⁻⁶/K | Temperature range: 20–300 °C | EN 10213 |
| Thermal Conductivity | 17 W/(m·K) | Test at 50 °C | EN 10213 |
| Thermal Conductivity | 18 W/(m·K) | Test at 100 °C | EN 10213 |
| Specific Heat | 450 J/(kg·K) | Test at 20 °C | EN 10213 |
| Specific Heat | 450 J/(kg·K) | Test at 20 °C | EN 10283 |
| Thermal Conductivity | 17 W/(m·K) | Test at 50 °C | EN 10283 |
| Thermal Conductivity | 18 W/(m·K) | Test at 100 °C | EN 10283 |
| Thermal Expansion | 13 ×10⁻⁶/K | Temperature range: 20–100 °C | EN 10283 |
| Thermal Expansion | 14 ×10⁻⁶/K | Temperature range: 20–300 °C | EN 10283 |
Chemical Composition
| Element | EN 10213Edition 2007+A1:2016 · wt.%Cast analysis | EN 10283Edition 2019 · wt.%Cast analysis | ISO 11972Edition 2023 · wt.% |
|---|---|---|---|
| C | ≤ 0.030 | ≤ 0.030 | ≤ 0.03 |
| Si | ≤ 1.00 | ≤ 1.00 | ≤ 1.0 |
| Mn | ≤ 1.50 | ≤ 1.50 | ≤ 1.50 |
| P | ≤ 0.035 | ≤ 0.035 | ≤ 0.035 |
| S | ≤ 0.025 | ≤ 0.025 | ≤ 0.025 |
| Cr | 24.50–26.50 | 24.50–26.50 | 24.5–26.5 |
| Ni | 5.00–7.00 | 5.00–7.00 | 5.0–7.0 |
| Mo | 2.50–3.50 | 2.50–3.50 | 2.50–3.50 |
| Cu | 2.75–3.50 | 2.75–3.50 | 2.75–3.50 |
| N | 0.12–0.22 | 0.12–0.22 | 0.12–0.22 |
Heat Treatment
EN 10213–2007+A1:2016 · +AT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Informative: solution annealing | 1120–1150 °C[1] | water quench |
EN 10283–2019 · +AT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | solution annealing | 1120–1150 °C | water |
ISO 11972–2023 · Solution treated
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | solution treatment | 1120–1150 °C[2] | quench in water |
Notes
EN 10213 · Edition 2007+A1:2016
[1] +AT: Treatment temperatures are given for information; required delivery condition is specified separately.; After solution annealing, castings may be cooled to 1050–1010 °C before water quenching to improve corrosion resistance and prevent cracks in complex shapes.
ISO 11972 · Edition 2023
[2] Solution treated: After high-temperature solution annealing, optional cooling from 1040 °C to 1010 °C before water quenching may prevent cracks in complex shapes.
Mechanical Properties
Core Mechanical Properties
EN 10213 — 2007+A1:2016 · Table 3 — Normative
EN 10283 — 2019 · Table 2 — Normative
| Property | +AT |
|---|---|
| Yield Strength (Rp0.2) | ≥ 480 MPa |
| Tensile Strength | ≥ 650 MPa |
| Elongation | ≥ 22 % |
| Impact Energy | ≥ 50 J[2] |
- 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.
ISO 11972 — 2023 · Table 2 — Normative
| Property | Solution treated |
|---|---|
| Yield Strength (Rp0.2) | ≥ 480 MPa |
| Tensile Strength | ≥ 650 MPa |
| Elongation | ≥ 22 % |
| Impact Energy | ≥ 50 J[3] |
- wall thickness ≤ 150 mm; Room temperature; Test blocks used to verify mechanical properties shall not exceed 150 mm thickness. Properties for samples removed from castings shall be agreed between manufacturer and purchaser.
Additional Mechanical Properties
Elevated-Temperature Properties
Low-Temperature Properties
EN 10213 — 2007+A1:2016 · Table 5 — Normative
| Property | +AT |
|---|---|
| Impact Energy | ≥ 35 J[6] |
Notes
EN 10213 · Edition 2007+A1:2016
[1] Yield Strength (Rp0.2)/Tensile Strength/Elongation/Impact Energy: wall thickness ≤ 150 mm; Properties verified on test blocks of thickness up to 150 mm; applicability to casting wall thickness as stated. Larger governing thickness requires agreement.; Room temperature
[4] Yield Strength (Rp0.2): Test at 100 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[5] Yield Strength (Rp0.2): Test at 200 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[6] Impact Energy: Test at -70 °C; Test block; maximum thickness 150 mm; Optional by agreement at enquiry and order
EN 10283 · Edition 2019
[2] Impact Energy: KV2 as specified in
ISO 11972 · Edition 2023
[3] Impact Energy: Verification of impact tests is required only when indicated by the customer.
Welding Conditions
EN 10213–2007+A1:2016
EN 10283–2019
Notes
EN 10213 · Edition 2007+A1:2016
[1] Preheat: Production welding by the foundry; requirements for austenitic/austenitic-ferritic grades are normative.; Preheat temperature depends on casting geometry, thickness and climatic conditions.
[2] Interpass Temperature: Production welding by the foundry; requirements for austenitic/austenitic-ferritic grades are normative.
[3] Post-weld Heat Treatment: Production welding by the foundry; requirements for austenitic/austenitic-ferritic grades are normative.; In general, production welds are major when prepared cavity depth exceeds 40% of the wall thickness; minor weld corrosion conditions may require special agreement.
[4] Post-weld Heat Treatment: +AT (solution annealing and water quenching); air quenching may be agreed for very small, thin castings. +AT may be omitted only with restricted welding heat input. Optional cooling to 1050–1010 °C before water quenching.
EN 10283 · Edition 2019
[5] Preheat: Preheat depends on casting geometry, thickness and climatic conditions.
[6] 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.
[7] Post-weld Heat Treatment: major welds; Air quenching may be agreed for very small, thin castings according to corrosion conditions.
Applications
Typical cast components 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