12Cr1MoV & 15CrMo’s Secret Global Names Exposed
12Cr1MoV (China GB/T 3077-2015 “Alloy Structural Steel”)
Core composition: C 0.08-0.15%, Si 0.17-0.37%, Mn 0.40-0.70%, Cr 0.90-1.20%, Mo 0.25-0.35%, V 0.15-0.30% (vanadium-strengthened, superior heat resistance compared to 15CrMo).
Equivalent International Steel Grades (by Standard Classification)
| Country/Standard | Steel Grade | Remarks |
| Germany | DIN 17175 13CrMo44 | Closest equivalent to China’s 15CrMo |
| United States | ASTM A335 P11 ASTM A213 T11 |
P11 is seamless pipe, while T11 is boiler heat exchanger tubing.The two grades are often considered equivalent in engineering practice. |
| Japan | JIS G3458 STPA22 JIS G3462 STBA22 |
STPA22 is seamless pipe, STBA22 is boiler tube, composition consistent with 13CrMo44. |
| United Kingdom | BS 3604 620°C Grade BS 3059 Part 2 620°C Grade |
Suitable for high-temperature environments below 620°C, with heat resistance equivalent to 15CrMo. |
| France | NF A49-213 13CrMo44 | Fully consistent with German DIN 17175 13CrMo44. |
The image above shows Chinese-made 12Cr1MoVA round bar
15CrMo (Chinese GB/T 3077-2015 “Alloy Structural Steel”) Corresponding International Steel Grades
Core composition: C 0.12-0.18%, Si 0.17-0.37%, Mn 0.40-0.70%, Cr 0.80-1.10%, Mo 0.40-0.55%.
Equivalent Foreign Steel Grades (by Standard Classification)
| Country/Standard | Steel Grade | Remarks |
| Germany | DIN 17175 12CrMoV195 DIN 17240 13CrMoV44 (approximate) |
12CrMoV195’s composition is highly consistent with 12Cr1MoV. 13CrMoV44 serves as an approximate substitute. |
| Russia | GOST 5520 12Х1МФ | Russian standard designation, fully equivalent to 12Cr1MoV. |
| United States | ASTM A335 P12V (non-standard) ASTM A213 T12V (non-standard) |
No direct equivalent in American standards; engineering practice often substitutes P12 with V, or refers to it as “1Cr-1Mo-V”. |
| Japan | JIS G3458 STBA23 JIS G3462 STBA23 |
Seamless pipe/boiler tube with composition containing Si 0.50-0.80% (slightly higher), but heat resistance equivalent to 12Cr1MoV. |
| France | NF A49-213 12CrMoV10 | Composition identical to German 12CrMoV195, used for high-temperature pressure vessels. |
The image above shows 15CrMo round bar
Key Note:
(1) Equivalent ≠ Identical
Standards across countries may exhibit minor variations in silicon (Si) content and impurity limits (e.g., P, S), but core alloying elements (Cr, Mo, V) and heat resistance properties remain consistent, allowing interchangeability in engineering applications.
(2)Prioritize German DIN standards
15CrMo corresponds to 13CrMo44, and 12Cr1MoV corresponds to 12CrMoV195—the most commonly used international equivalents widely adopted in multinational projects.
(3) S. ASTM Standards
15CrMo is commonly referred to as P11/T11, while 12Cr1MoV is often designated as P12V/T12V (non-standard but industry-accepted).
Application Examples
15CrMo: Commonly used in main steam pipes of power plant boilers (below 540°C) and petrochemical cracking furnace tubes.
12Cr1MoV: Commonly used in supercritical boiler superheater tubes (below 570°C) and high-pressure turbine bolts (offers superior creep resistance due to its vanadium content).
The above represents conventional equivalencies between domestic steel grades and international standards. Specific applications must adhere to project specifications or material certificates.
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