GX4CrNi16-4 (EN 1.4421) Martensitic Stainless Steel Casting Material
Martensitic Stainless Steel
Introduction
GX4CrNi16-4 (EN 1.4421) is a martensitic stainless steel casting grade specified in EN 10293. The standard covers steel castings for general engineering uses and defines the applicable delivery conditions and engineering requirements. Casting process options include Investment Casting, Shell Molding Casting and Sand Casting, subject to the applicable specification and component requirements.
| Field | Value |
|---|---|
| Designation | GX4CrNi16-4 (EN 1.4421) |
| Material Type | Stainless Steel |
| Sub Type | Martensitic Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Grades
Similar Materials
N/A
Reference Standards
| Standard | Standard Title | Edition | Specification | Identifier |
|---|---|---|---|---|
| EN 10293 | Steel castings — Steel castings for general engineering uses | 2015 | GX4CrNi16-4 | — |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | EN 10293Edition 2015 · wt.%Cast analysis |
|---|---|
| C | ≤ 0.06 |
| Si | ≤ 0.80 |
| Mn | ≤ 1.00 |
| P | ≤ 0.035 |
| S | ≤ 0.020 |
| Cr | 15.50–17.50 |
| Ni | 4.00–5.50 |
| Mo | ≤ 0.70 |
| Cu | ≤ 0.30[1] |
| V | ≤ 0.08[1] |
Notes
EN 10293 · Edition 2015
[1] Cu/V: Applies only where unspecified in unless otherwise agreed; no intentional addition except for finishing the heat.
Heat Treatment
EN 10293–2015 · +QT1
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | : quenching | 1020–1070 °C | air |
| 2 | : tempering | 580–630 °C | — |
EN 10293–2015 · +QT2
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | : quenching | 1020–1070 °C | air |
| 2 | : tempering | 450–500 °C | — |
Mechanical Properties
Conditions are not identical. Compare each stated condition and applicability separately.
| Property | EN 10293Edition 2015+QT1[1] | EN 10293Edition 2015+QT2[2] |
|---|---|---|
| Yield Strength (Rp0.2) | ≥ 540 MPa | ≥ 830 MPa |
| Tensile Strength | 780–960 MPa | 1000–1200 MPa |
| Elongation | ≥ 15 % | ≥ 10 % |
| Impact Energy | ≥ 60 J | ≥ 27 J |
Notes
EN 10293 · Edition 2015
[1] All properties in this column; +QT1: wall thickness ≤ 300 mm; Test block of relevant thickness; maximum test-block wall thickness 150 mm; Room temperature; Properties apply to the casting up to the specified maximum wall thickness; above this, foreseeable lowering shall be agreed.
[2] All properties in this column; +QT2: wall thickness ≤ 300 mm; Test block of relevant thickness; maximum test-block wall thickness 150 mm; Room temperature; Properties apply to the casting up to the specified maximum wall thickness; above this, foreseeable lowering shall be agreed.
Welding Conditions
EN 10293–2015
| Requirement | Value |
|---|---|
| Preheat | No preheat[1] |
| Interpass Temperature | ≤ 200 °C |
| Post-weld Heat Treatment | Same as base-material tempering temperature |
Notes
EN 10293 · Edition 2015
[1] Preheat: Preheat depends on casting geometry, thickness and climatic conditions.
Applications
At the casting-family level, typical applications include machinery, automotive and railway components, agricultural equipment and mining equipment.
Last Updated: October 16, 2026