What is T12 steel equivalent to
Mar 14, 2025
What is T12 steel equivalent to?
SA213 T12 equivalent material analysis
1. Correspondence with international standards
Material type: SA213 T12 belongs to ASTM/ASME standard ferritic alloy seamless steel pipe, specialised in boilers, superheaters and heat exchangers.
Equivalent grade:
ASTM A335 P12: both have similar chemical composition (Cr 1.00%-1.50%, Mo 0.44%-0.65%), but P12 belongs to high temperature piping standard (ASTM A335), and T12 belongs to boiler tube standard (SA213). The application scenarios are different.
2. Corresponding domestic grades
China GB standard:
15CrMoG: The Cr and Mo content of T12 is highly compatible with 15CrMoG (GB/T 5310), and both are used for high-pressure boiler parts, which can be regarded as the equivalent material in China.
3. Comparative chemical composition
| composition | SA213 T12 | 15CrMoG |
|---|---|---|
| C | 0.05%-0.15% | ≤0.18% |
| Cr | 1.00%-1.50% | 1.00%-1.50% |
| Mo | 0.44%-0.65% | 0.45%-0.65% |
| Si | 0.50%-1.00% | 0.15%-0.40% |
| Mn | 0.30%-0.60% | 0.40%-0.70% |
4. Application scenarios and performance
High temperature performance: T12 is suitable for boiler tubes and heat exchangers at 450-550℃, with creep resistance comparable to that of 15CrMoG.
Mechanical properties:
Tensile strength: ≥415MPa (T12);
Yield strength: ≥ 220MPa (T12).
5. Summary
SA213 T12 chemical composition and properties and 15CrMoG (GB/T 5310) is highly consistent, can be regarded as the domestic equivalent material; in the international standard, its composition and ASTM In international standards, its composition is close to ASTM A335 P12, but with different applications (boiler tube vs. high temperature pipe). The actual selection should be determined according to the specific standard requirements and working conditions.
