Introduction
G17NiCrMo13-6 (EN 1.6781) is a low-alloy 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 | G17NiCrMo13-6 (EN 1.6781) |
| Material Type | Alloy Steel |
| Sub Type | Low-Alloy 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 | 7.85 kg/dm³ | Test at 20 °C |
| Specific Heat | 460 J/(kg·K) | Test at 20 °C |
| Magnetic Property | Magnetic |
Chemical Composition
| Element | EN 10213Edition 2007+A1:2016 · wt.%Cast analysis | EN 10293Edition 2015 · wt.%Cast analysis |
|---|---|---|
| C | 0.15–0.19 | 0.15–0.19 |
| Si | ≤ 0.50 | ≤ 0.50 |
| Mn | 0.55–0.80 | 0.55–0.80 |
| P | ≤ 0.015 | ≤ 0.015 |
| S | ≤ 0.015 | ≤ 0.015 |
| Cr | 1.30–1.80 | 1.30–1.80 |
| Ni | 3.00–3.50 | 3.00–3.50 |
| Mo | 0.45–0.60 | 0.45–0.60 |
| Cu | ≤ 0.30 | ≤ 0.30[1] |
| V | ≤ 0.05 | ≤ 0.05[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 10213–2007+A1:2016 · +QT
EN 10293–2015 · +QT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | : quenching | 890–930 °C | air or liquid |
| 2 | : tempering | 600–640 °C | — |
Notes
EN 10213 · Edition 2007+A1:2016
[1] +QT: Treatment temperatures are given for information; required delivery condition is specified separately.
Mechanical Properties
| Property | EN 10213Edition 2007+A1:2016 | EN 10293Edition 2015[1] |
|---|---|---|
| Yield Strength (Rp0.2) | ≥ 600 MPa[2] | ≥ 600 MPa[3] |
| Tensile Strength | 750–900 MPa[2] | 750–900 MPa[3] |
| Elongation | ≥ 15 %[2] | ≥ 15 %[3] |
| Impact Energy | ≥ 27 J[4] | ≥ 27 J[5] ≥ 30 J[3] |
Notes
EN 10293 · Edition 2015
[1] All properties in this column: wall thickness ≤ 200 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.
[3] Yield Strength (Rp0.2)/Tensile Strength/Elongation/Impact Energy: Room temperature
[5] Impact Energy: Test at -80 °C
EN 10213 · Edition 2007+A1:2016
[2] Yield Strength (Rp0.2)/Tensile Strength/Elongation: wall thickness ≤ 200 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
[4] Impact Energy: Test at -80 °C; Test block; maximum thickness 150 mm; Specified low-temperature impact requirement
Welding Conditions
EN 10213–2007+A1:2016
EN 10293–2015
| Requirement | Value |
|---|---|
| Preheat | 20–200 °C[4] |
| Interpass Temperature | ≤ 350 °C |
| Post-weld Heat Treatment | ≥ 560 °C |
Notes
EN 10213 · Edition 2007+A1:2016
[1] Preheat: Production welding by the foundry; ferritic/martensitic guidance is informative.; Preheat temperature depends on casting geometry, thickness and climatic conditions.
[2] Interpass Temperature: Production welding by the foundry; ferritic/martensitic guidance is informative.
[3] Post-weld Heat Treatment: Production welding by the foundry; ferritic/martensitic guidance is informative.; 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 10293 · Edition 2015
[4] Preheat: Preheat depends on casting geometry, thickness and climatic 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