12Cr1MoVG
Data under review12Cr1MoVG is the Chinese Cr-Mo-V boiler tube steel of GB/T 5310, a mainstay for superheater and reheater tubes and main steam lines in thermal power plants. Vanadium carbides give it creep strength to about 580 °C.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.08–0.15 |
| Si | 0.17–0.37 |
| Mn | 0.40–0.70 |
| P | ≤0.025 |
| S | ≤0.010 |
| Cr | 0.90–1.20 |
| Mo | 0.25–0.35 |
| V | 0.15–0.30 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Yield strength | ≥255 MPa (tube) |
| Tensile strength | 470–640 MPa |
| Service temperature | to ~580 °C |
| Density | 7.85 g/cm³ |
Heat treatment
Supplied normalized and tempered; PWHT after welding, typically 720–760 °C.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 13CrMoV9-10 family (near) |
| gb | 12Cr1MoVG (GB/T 5310) |
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Superheater/reheater tubes, main steam piping, headers in coal-fired power plants.
Processing: Weld with matching CrMoV filler under strict preheat and PWHT control; field welds are a known quality-critical operation on this grade.
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Ask for a quotationVisit NasteelSource: GB/T 5310 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.