13CrMo4-5 vs 15CrMoG
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
13CrMo4-5
Structural & HSLA Steel
13CrMo4-5 is the EN 10028-2 1Cr-0.5Mo creep-resisting plate for boilers, hot vessels and power piping. It is the European near-counterpart of ASTM A387 Grades 11/12 and China’s 15CrMo family.
Standards: DIN 1.7335 (13CrMo4-5) · AISI A387 Gr.11/12 (near) · JIS SCMV3 (near) · GB 15CrMoG / 15CrMoR (near)
15CrMoG
Structural & HSLA Steel
15CrMoG is China’s 1Cr-0.5Mo heat-resistant steel for boiler tube (GB/T 5310) and vessel plate, the domestic counterpart of 13CrMo4-5. It serves superheaters, headers and hot pressure parts to about 550 °C.
Standards: DIN 13CrMo4-5 (near) · AISI A387 Gr.12 (near) / A335 P12 tube · JIS SCMV3 (near) · GB 15CrMoG (GB/T 5310 tube; GB/T 713 plate)
Chemical composition compared (%)
| Element | 13CrMo4-5 | 15CrMoG |
|---|---|---|
| C | 0.08–0.18 | 0.12–0.18 |
| Si | ≤0.35 | 0.15–0.40 |
| Mn | 0.40–1.00 | 0.40–0.70 |
| P | ≤0.025 | ≤0.025 |
| S | ≤0.010 | ≤0.015 |
| Cr | 0.70–1.15 | 0.80–1.10 |
| Mo | 0.40–0.60 | 0.40–0.55 |
Properties compared
| Property | 13CrMo4-5 | 15CrMoG |
|---|---|---|
| Yield strength | ≥300 MPa (≤16 mm) | ≥295 MPa (plate) |
| Tensile strength | 450–600 MPa | 440–640 MPa |
| Service temperature | to ~570 °C | to ~550 °C |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: 13CrMo4-5 · 15CrMoG. Substitution decisions for certified parts stay with the design authority.