GX4CrNi16-4 (EN 1.4421) Martensitic Stainless Steel Casting Material
Martensitic Stainless Steel
Introduction
GX4CrNi16-4 is a martensitic stainless steel casting grade covered by EN 10293. Typical family applications include impellers, pump casings, valve bodies and internal pump and valve parts.
| 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 Materials
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 | Informative: quenching | 1020–1070 °C | air |
| 2 | Informative: tempering | 580–630 °C | — |
EN 10293–2015 · +QT2
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Informative: quenching | 1020–1070 °C | air |
| 2 | Informative: tempering | 450–500 °C | — |
Mechanical Properties
Core Mechanical Properties
Conditions are not identical. Compare each stated condition and applicability separately.
EN 10293 — 2015 · Table 3 — Normative
| Property | +QT1 | +QT2 |
|---|---|---|
| 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 |
- 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
For martensitic stainless steel EN 10293 GX4CrNi16-4, typical cast components in this material family include impellers, pump casings, valve bodies and internal pump and valve parts. These castings are used in water-service pumping systems, industrial process equipment and power-generation facilities.
Need GX4CrNi16-4 Castings?
Contact us for casting and machining inquiries.
Email Us for a QuoteLast Updated: November 6, 2026