G17Mn5 (EN 1.1131) Low-Alloy Steel Casting Material
Low-Alloy Steel
Introduction
G17Mn5 is a low-alloy steel casting grade covered by EN 10213, EN 10293, EN 10340. Typical family applications include valve bodies, pump casings and fittings.
| Field | Value |
|---|---|
| Designation | G17Mn5 (EN 1.1131) |
| 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
Related Casting Products
Physical Properties
| Property | Value / Unit | Note | Source |
|---|---|---|---|
| Density | 7.8 kg/dm³ | Test at 20 °C | EN 10213 |
| Thermal Expansion | 13.0 ×10⁻⁶/K | Temperature range: 20–100 °C | EN 10213 |
| Thermal Expansion | 13.8 ×10⁻⁶/K | Temperature range: 20–300 °C | EN 10213 |
| Thermal Expansion | 15 ×10⁻⁶/K | Temperature range: 20–500 °C | EN 10213 |
| Thermal Conductivity | 45 W/(m·K) | Test at 50 °C | EN 10213 |
| Specific Heat | 460 J/(kg·K) | Test at 20 °C | EN 10213 |
| Magnetic Property | Magnetic | EN 10213 |
Chemical Composition
| Element | EN 10213Edition 2007+A1:2016 · wt.%Cast analysis | EN 10293Edition 2015 · wt.%Cast analysis | EN 10340Edition 2007 · wt.%Cast analysis |
|---|---|---|---|
| C | 0.15–0.20 | 0.15–0.20 | 0.15–0.20 |
| Si | ≤ 0.60 | ≤ 0.60 | ≤ 0.60 |
| Mn | 1.00–1.60 | 1.00–1.60 | 1.00–1.50 |
| P | ≤ 0.020 | ≤ 0.020[1] | ≤ 0.020 |
| S | ≤ 0.020[2] | ≤ 0.020[3] | ≤ 0.020[4] |
| Cr | ≤ 0.30[5] | ≤ 0.30[6] | ≤ 0.30[7] |
| Ni | ≤ 0.40[5] | ≤ 0.40[6] | ≤ 0.40[7] |
| Mo | ≤ 0.12[5] | ≤ 0.12[6] | ≤ 0.12[7] |
| Cu | ≤ 0.30[5] | ≤ 0.30[6] | ≤ 0.30[7] |
| V | ≤ 0.03[5] | ≤ 0.03[6] | ≤ 0.03[7] |
Notes
EN 10293 · Edition 2015
[1] P: A maximum phosphorus content of 0.025 wt.% is permitted by agreement between purchaser and manufacturer.
[3] S: For castings of ruling thickness <28 mm, sulfur up to 0.030 wt.% is permitted.
[6] Cr/Ni/Mo/Cu/V: Applies only where unspecified in unless otherwise agreed; no intentional addition except for finishing the heat.
EN 10213 · Edition 2007+A1:2016
[2] S: For ruling thickness < 28 mm, sulfur up to 0.030 wt.% is permitted.
[5] Cr/Ni/Mo/Cu/V: Cr + Mo + Ni + V + Cu ≤ 1.00 wt.%.
EN 10340 · Edition 2007
[4] S: For castings of ruling thickness <28 mm, sulfur up to 0.030 wt.% is permitted.
[7] Cr/Ni/Mo/Cu/V: Cr + Mo + Ni + V + Cu ≤1.00 wt.%.
Heat Treatment
EN 10213–2007+A1:2016 · +QT
EN 10293–2015 · +QT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Informative: quenching | 920–980 °C | air or liquid |
| 2 | Informative: tempering | 600–700 °C | — |
EN 10340–2007 · +QT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Informative: quenching | 920–980 °C | air or liquid |
| 2 | Informative: tempering | 600–700 °C | — |
Notes
EN 10213 · Edition 2007+A1:2016
[1] +QT: 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 10293 — 2015 · Table 3 — Normative
| Property | +QT |
|---|---|
| Yield Strength (Rp0.2) | ≥ 240 MPa[2] |
| Tensile Strength | 450–600 MPa[2] |
| Elongation | ≥ 24 %[2] |
| Impact Energy | ≥ 70 J[2] |
- wall thickness ≤ 50 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.
EN 10340 — 2007 · Table 2 — Normative
| Property | +QT |
|---|---|
| Yield Strength (Rp0.2) | ≥ 240 MPa[3] |
| Tensile Strength | 450–600 MPa[3] |
| Elongation | ≥ 24 %[3] |
| Impact Energy | ≥ 70 J[3] |
- wall thickness ≤ 50 mm; Test block of relevant thickness; maximum thickness 150 mm; Yield and tensile strength also apply to the casting up to the maximum relevant wall thickness.
Additional Mechanical Properties
Low-Temperature Properties
EN 10213 — 2007+A1:2016 · Table 4 — Normative
| Property | +QT |
|---|---|
| Impact Energy | ≥ 27 J[4] |
EN 10293 — 2015 · Table 3 — Normative
| Property | +QT |
|---|---|
| Impact Energy | ≥ 27 J[5] |
- wall thickness ≤ 50 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.
EN 10340 — 2007 · Table 2 — Normative
| Property | +QT |
|---|---|
| Impact Energy | ≥ 27 J[6] |
- wall thickness ≤ 50 mm; Test block of relevant thickness; maximum thickness 150 mm; Yield and tensile strength also apply to the casting up to the maximum relevant wall thickness.
Notes
EN 10213 · Edition 2007+A1:2016
[1] Yield Strength (Rp0.2)/Tensile Strength/Elongation: wall thickness ≤ 50 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 -40 °C; Test block; maximum thickness 150 mm; Specified low-temperature impact requirement
EN 10293 · Edition 2015
[2] Yield Strength (Rp0.2)/Tensile Strength/Elongation/Impact Energy: Room temperature
[5] Impact Energy: Test at -40 °C
EN 10340 · Edition 2007
[3] Yield Strength (Rp0.2)/Tensile Strength/Elongation/Impact Energy: Room temperature
[6] Impact Energy: Test at -40 °C
Welding Conditions
EN 10293–2015
| Requirement | Value |
|---|---|
| Preheat | 20–150 °C[3] |
| Interpass Temperature | ≤ 350 °C |
| Post-weld Heat Treatment | No post-weld heat treatment necessary |
EN 10340–2007
| Requirement | Value |
|---|---|
| Preheat | 20–150 °C[4] |
| Interpass Temperature | ≤ 350 °C |
| Post-weld Heat Treatment | No post-weld heat treatment necessary |
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.
EN 10293 · Edition 2015
[3] Preheat: Preheat depends on casting geometry, thickness and climatic conditions.
EN 10340 · Edition 2007
[4] Preheat: Preheat depends on casting geometry, thickness and climatic conditions.
Applications
Typical cast components in this material family include valve bodies, pump casings and fittings. Applications include industrial process plants, heating circuits and power-generation equipment. Service medium, temperature, material condition and the finished equipment design determine the permitted duty; the grade name alone is not an operating rating.
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