GX2CrNiMoN25-7-3 (EN 1.4417) Duplex Stainless Steel Casting Material
Duplex Stainless Steel
Introduction
GX2CrNiMoN25-7-3 (EN 1.4417) is a duplex stainless steel casting grade specified in EN 10213. The standard defines delivery conditions and engineering requirements for pressure-containing components. Casting process options include Investment Casting, Shell Molding Casting and Sand Casting, subject to the applicable specification and component requirements.
| Field | Value |
|---|---|
| Designation | GX2CrNiMoN25-7-3 (EN 1.4417) |
| Material Type | Stainless Steel |
| Sub Type | Duplex Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Grades
Similar Materials
N/A
Reference Standards
Related Casting Products
Physical Properties
EN 10213–2007+A1:2016
| Property | Value | Note |
|---|---|---|
| Density | 7.7 kg/dm³ | Test at 20 °C |
| Thermal Expansion | 13 ×10⁻⁶/K | Temperature range: 20–100 °C |
| Thermal Expansion | 14 ×10⁻⁶/K | Temperature range: 20–300 °C |
| Thermal Conductivity | 17 W/(m·K) | Test at 50 °C |
| Thermal Conductivity | 18 W/(m·K) | Test at 100 °C |
| Specific Heat | 450 J/(kg·K) | Test at 20 °C |
EN 10283–2019
| Property | Value | Note |
|---|---|---|
| Density | 7.7 kg/dm³ | Test at 20 °C |
| Specific Heat | 450 J/(kg·K) | Test at 20 °C |
| Thermal Conductivity | 17 W/(m·K) | Test at 50 °C |
| Thermal Conductivity | 18 W/(m·K) | Test at 100 °C |
| Thermal Expansion | 13 ×10⁻⁶/K | Temperature range: 20–100 °C |
| Thermal Expansion | 14 ×10⁻⁶/K | Temperature range: 20–300 °C |
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 | ≤ 1.5 |
| P | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| S | ≤ 0.020 | ≤ 0.020 | ≤ 0.020 |
| Cr | 24.00–26.00 | 24.00–26.00 | 24.0–26.0 |
| Ni | 6.00–8.50 | 6.00–8.50 | 6.0–8.5 |
| Mo | 3.00–4.00 | 3.00–4.00 | 3.00–4.00 |
| Cu | ≤ 1.00 | ≤ 1.00[1] | ≤ 1.00 |
| N | 0.15–0.25 | 0.15–0.25 | 0.15–0.25 |
| W | ≤ 1.00 | ≤ 1.00[1] | ≤ 1.00 |
Notes
EN 10283 · Edition 2019
[1] Cu/W: For special applications, minimum copper and tungsten contents of 0.5 wt.% each may be agreed.
Heat Treatment
EN 10213–2007+A1:2016 · +AT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | : 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
| Property | EN 10213Edition 2007+A1:2016 | EN 10283Edition 2019[1] | ISO 11972Edition 2023[2] |
|---|---|---|---|
| Yield Strength (Rp0.2) | ≥ 480 MPa[3] ≥ 390 MPa[4] ≥ 330 MPa[5] | ≥ 480 MPa | ≥ 480 MPa |
| Tensile Strength | 650–850 MPa[3] | ≥ 650 MPa | ≥ 650 MPa |
| Elongation | ≥ 22 %[3] | ≥ 22 % | ≥ 22 % |
| Impact Energy | ≥ 50 J[3] ≥ 35 J[6] | ≥ 50 J[7] | ≥ 50 J[8] |
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.
[7] Impact Energy: KV2 as specified in
ISO 11972 · Edition 2023
[2] All properties in this column: 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.
[8] Impact Energy: Verification of impact tests is required only when indicated by the customer.
EN 10213 · Edition 2007+A1:2016
[3] 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
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
At the casting-family level, typical applications include valve bodies, pump casings and other pressure-containing components. Material selection should account for service temperature, loading and the specified delivery condition.
Last Updated: October 16, 2026