GX2NiCrMo28-20-2 (EN 1.4458) Austenitic Stainless Steel Casting Material
Austenitic Stainless Steel
Introduction
GX2NiCrMo28-20-2 (EN 1.4458) is an austenitic 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 | GX2NiCrMo28-20-2 (EN 1.4458) |
| Material Type | Stainless Steel |
| Sub Type | Austenitic Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Grades
N/A
Similar Materials
N/A
Reference Standards
Related Casting Products
Physical Properties
EN 10213–2007+A1:2016
| Property | Value | Note |
|---|---|---|
| Density | 8.0 kg/dm³ | Test at 20 °C |
| Thermal Expansion | 14.5 ×10⁻⁶/K | Temperature range: 20–100 °C |
| Thermal Expansion | 16.2 ×10⁻⁶/K | Temperature range: 20–300 °C |
| Thermal Expansion | 17 ×10⁻⁶/K | Temperature range: 20–500 °C |
| Thermal Conductivity | 16 W/(m·K) | Test at 50 °C |
| Thermal Conductivity | 17 W/(m·K) | Test at 100 °C |
| Specific Heat | 500 J/(kg·K) | Test at 20 °C |
| Magnetic Property | Not or slightly magnetic |
EN 10283–2019
| Property | Value | Note |
|---|---|---|
| Density | 8.0 kg/dm³ | Test at 20 °C |
| Specific Heat | 500 J/(kg·K) | Test at 20 °C |
| Thermal Conductivity | 16 W/(m·K) | Test at 50 °C |
| Thermal Conductivity | 17 W/(m·K) | Test at 100 °C |
| Thermal Expansion | 14.5 ×10⁻⁶/K | Temperature range: 20–100 °C |
| Thermal Expansion | 16.2 ×10⁻⁶/K | Temperature range: 20–300 °C |
| Thermal Expansion | 17 ×10⁻⁶/K | Temperature range: 20–500 °C |
Chemical Composition
| Element | EN 10213Edition 2007+A1:2016 · wt.%Cast analysis | EN 10283Edition 2019 · wt.%Cast analysis |
|---|---|---|
| C | ≤ 0.030 | ≤ 0.030 |
| Si | ≤ 1.00 | ≤ 1.00 |
| Mn | ≤ 2.00 | ≤ 2.00 |
| P | ≤ 0.035 | ≤ 0.035 |
| S | ≤ 0.025 | ≤ 0.025 |
| Cr | 19.00–22.00 | 19.00–22.00 |
| Ni | 26.00–30.00 | 26.00–30.00 |
| Mo | 2.00–2.50 | 2.00–2.50 |
| Cu | ≤ 2.00 | ≤ 2.00 |
| N | ≤ 0.20 | ≤ 0.20 |
Heat Treatment
EN 10213–2007+A1:2016 · +AT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | : solution annealing | 1100–1180 °C[1] | water quench |
EN 10283–2019 · +AT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | solution annealing | 1080–1180 °C | water |
Notes
EN 10213 · Edition 2007+A1:2016
[1] +AT: Treatment temperatures are given for information; required delivery condition is specified separately.
Mechanical Properties
| Property | EN 10213Edition 2007+A1:2016 | EN 10283Edition 2019[1] |
|---|---|---|
| Yield Strength (Rp1.0) | ≥ 190 MPa[2] ≥ 165 MPa[3] ≥ 135 MPa[4] ≥ 120 MPa[5] ≥ 110 MPa[6] | ≥ 190 MPa |
| Tensile Strength | 430–630 MPa[2] | ≥ 430 MPa |
| Elongation | ≥ 30 %[2] | ≥ 30 % |
| Impact Energy | ≥ 60 J[2] ≥ 60 J[7] | ≥ 60 J[8] |
| Yield Strength (Rp0.2) | — / Not specified | ≥ 165 MPa |
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.
[8] Impact Energy: KV2 as specified in
EN 10213 · Edition 2007+A1:2016
[2] Yield Strength (Rp1.0)/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
[3] Yield Strength (Rp1.0): Test at 100 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[4] Yield Strength (Rp1.0): Test at 200 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[5] Yield Strength (Rp1.0): Test at 300 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[6] Yield Strength (Rp1.0): Test at 400 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[7] Impact Energy: Test at -196 °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.
EN 10283 · Edition 2019
[4] Preheat: Preheat depends on casting geometry, thickness and climatic conditions.
[5] Post-weld Heat Treatment: minor welds; Special arrangements may be agreed according to corrosion conditions. With low preheat and interpass temperatures (≤150 °C), post-weld heat treatment may be suppressed by agreement.
[6] 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 13, 2026