G20NiMoCr4 (EN 1.6750) Low-Alloy Steel Casting Material
Low-Alloy Steel
Introduction
G20NiMoCr4 is a low-alloy steel casting grade covered by EN 10293. Typical applications include cast parts in cooling equipment.
| Field | Value |
|---|---|
| Designation | G20NiMoCr4 (EN 1.6750) |
| Material Type | Alloy Steel |
| Sub Type | Low-Alloy Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Materials
N/A
Similar Materials
N/A
Reference Standards
| Standard | Standard Title | Edition | Specification | Identifier |
|---|---|---|---|---|
| EN 10293 | Steel castings — Steel castings for general engineering uses | 2015 | G20NiMoCr4 | — |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | EN 10293Edition 2015 · wt.%Cast analysis |
|---|---|
| C | 0.17–0.23 |
| Si | ≤ 0.60 |
| Mn | 0.80–1.20 |
| P | ≤ 0.025 |
| S | ≤ 0.015[1] |
| Cr | 0.30–0.50 |
| Ni | 0.80–1.20 |
| Mo | 0.40–0.80 |
| Cu | ≤ 0.30[2] |
| V | ≤ 0.05[2] |
Notes
EN 10293 · Edition 2015
[1] S: For castings of ruling thickness <28 mm, sulfur up to 0.030 wt.% is permitted.
[2] Cu/V: Applies only where unspecified in unless otherwise agreed; no intentional addition except for finishing the heat.
Heat Treatment
EN 10293–2015 · +QT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Informative: quenching | 880–930 °C | air or liquid |
| 2 | Informative: tempering | 650–700 °C | — |
Mechanical Properties
Core Mechanical Properties
EN 10293 — 2015 · Table 3 — Normative
| Property | +QT |
|---|---|
| Yield Strength (Rp0.2) | ≥ 410 MPa[1] |
| Tensile Strength | 570–720 MPa[1] |
| Elongation | ≥ 16 %[1] |
| Impact Energy | ≥ 100 J[1] |
- wall thickness ≤ 150 mm; Test block of relevant thickness; maximum test-block wall thickness 150 mm; Properties apply to the casting up to the specified maximum wall thickness; above this, foreseeable lowering shall be agreed.
Additional Mechanical Properties
Low-Temperature Properties
EN 10293 — 2015 · Table 3 — Normative
| Property | +QT |
|---|---|
| Impact Energy | ≥ 27 J[2] |
- wall thickness ≤ 150 mm; Test block of relevant thickness; maximum test-block wall thickness 150 mm; Properties apply to the casting up to the specified maximum wall thickness; above this, foreseeable lowering shall be agreed.
Notes
EN 10293 · Edition 2015
[1] Yield Strength (Rp0.2)/Tensile Strength/Elongation/Impact Energy: Room temperature
[2] Impact Energy: Test at -45 °C
Welding Conditions
EN 10293–2015
| Requirement | Value |
|---|---|
| Preheat | 150–300 °C[1] |
| Interpass Temperature | ≤ 350 °C |
| Post-weld Heat Treatment | Post-weld temperature 20–50 °C below the base-material tempering temperature |
Notes
EN 10293 · Edition 2015
[1] Preheat: Preheat depends on casting geometry, thickness and climatic conditions.
Applications
Low-alloy steel EN 10293 G20NiMoCr4 is used for cast parts in cooling equipment. Other cast components used in this material family include gear-related castings, couplings, housings, connecting parts and structural supports. Applications include industrial machinery, mining, agricultural and railway equipment, construction machinery and power-transmission assemblies.
The specified material condition and component duty remain important; no unverified wear-life or low-temperature rating is implied.
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