GX2NiCrMo28-20-2 (EN 1.4458) Austenitic Stainless Steel Casting Material
Austenitic Stainless Steel
Introduction
GX2NiCrMo28-20-2 is an austenitic stainless steel casting grade covered by EN 10213, EN 10283. Typical family applications include pump casings, impellers, valve bodies and covers.
| 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 Materials
N/A
Similar Materials
N/A
Reference Standards
Related Casting Products
Physical Properties
| Property | Value / Unit | Note | Source |
|---|---|---|---|
| Density | 8.0 kg/dm³ | Test at 20 °C | EN 10213; EN 10283 |
| Thermal Expansion | 14.5 ×10⁻⁶/K | Temperature range: 20–100 °C | EN 10213 |
| Thermal Expansion | 16.2 ×10⁻⁶/K | Temperature range: 20–300 °C | EN 10213 |
| Thermal Expansion | 17 ×10⁻⁶/K | Temperature range: 20–500 °C | EN 10213 |
| Thermal Conductivity | 16 W/(m·K) | Test at 50 °C | EN 10213 |
| Thermal Conductivity | 17 W/(m·K) | Test at 100 °C | EN 10213 |
| Specific Heat | 500 J/(kg·K) | Test at 20 °C | EN 10213 |
| Magnetic Property | Not or slightly magnetic | EN 10213 | |
| Specific Heat | 500 J/(kg·K) | Test at 20 °C | EN 10283 |
| Thermal Conductivity | 16 W/(m·K) | Test at 50 °C | EN 10283 |
| Thermal Conductivity | 17 W/(m·K) | Test at 100 °C | EN 10283 |
| Thermal Expansion | 14.5 ×10⁻⁶/K | Temperature range: 20–100 °C | EN 10283 |
| Thermal Expansion | 16.2 ×10⁻⁶/K | Temperature range: 20–300 °C | EN 10283 |
| Thermal Expansion | 17 ×10⁻⁶/K | Temperature range: 20–500 °C | EN 10283 |
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 | Informative: 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
Core Mechanical Properties
EN 10213 — 2007+A1:2016 · Table 3 — Normative
EN 10283 — 2019 · Table 2 — Normative
| Property | +AT |
|---|---|
| Yield Strength (Rp0.2) | ≥ 165 MPa |
| Yield Strength (Rp1.0) | ≥ 190 MPa |
| Tensile Strength | ≥ 430 MPa |
| Elongation | ≥ 30 % |
| Impact Energy | ≥ 60 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.
Additional Mechanical Properties
Elevated-Temperature Properties
Low-Temperature Properties
EN 10213 — 2007+A1:2016 · Table 5 — Normative
| Property | +AT |
|---|---|
| Impact Energy | ≥ 60 J[7] |
Notes
EN 10213 · Edition 2007+A1:2016
[1] 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
EN 10283 · Edition 2019
[2] Impact Energy: KV2 as specified in
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
Typical cast components in this material family include pump casings, impellers, valve bodies and covers. Typical settings include chemical and pharmaceutical processing, pulp-and-paper plants and selected water-handling systems. Suitability for a particular acid, concentration or temperature remains grade- and process-specific.
Need GX2NiCrMo28-20-2 Castings?
Contact us for casting and machining inquiries.
Email Us for a QuoteLast Updated: November 6, 2026