SA 387 Gr 12 Class 2 is a chromium-molybdenum (Cr-Mo) alloy steel plate designed for high-temperature pressure vessel applications.
SA 387 Gr 12 Class 2
Due to its excellent heat resistance, creep strength, and oxidation resistance, it is widely used in boilers, heat exchangers, and petrochemical equipment.
When sourcing globally, many buyers look for equivalent materials under different international standards.
SA 387 Gr 12 Cl 2 Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | A387 Grade 12 Class 2 |
| EN (Europe) | 13CrMo4-5 (EN 10028-2) |
| DIN (Germany) | 1.7335 |
| BS (UK) | 620B |
| JIS (Japan) | SCMV4 |
| GB (China) | 12CrMo or 15CrMo (approximate) |
While these grades are considered equivalents, minor differences in composition and mechanical properties may exist, so technical verification is recommended before substitution.
Chemical Composition of SA387 Gr 12 Cl 2
| Grade | Cr (%) | Mo (%) |
|---|---|---|
| SA387 Gr 12 | 0.80 – 1.25 | 0.45 – 0.65 |
| 13CrMo4-5 | 0.70 – 1.15 | 0.40 – 0.60 |
| 12CrMo (GB) | 0.40 – 0.70 | 0.40 – 0.55 |
SA387 Gr 12 has a slightly higher chromium content, giving it better oxidation resistance compared to some GB equivalents.
Mechanical Properties of SA387 Gr 12 Cl 2
| Property | SA387 Gr 12 Cl 2 | 13CrMo4-5 |
|---|---|---|
| Yield Strength | ≥ 220 MPa | ≥ 280 MPa |
| Tensile Strength | 415 – 585 MPa | 450 – 600 MPa |
| Heat Resistance | Excellent | Excellent |
All equivalent grades are suitable for elevated temperature service, but Class 2 heat treatment in SA387 ensures improved toughness and stability.
Typical Applications of SA387 Gr 12 Cl 2
SA387 Gr 12 Cl 2 and its equivalents are commonly used in:
- Pressure vessels
- Boilers
- Heat exchangers
- Petrochemical plants
- Power generation equipment
SA 387 Gr 12 Class 2 has several international equivalents, including 13CrMo4-5 and 1.7335, but its strict heat treatment and ASME compliance make it a preferred choice for high-temperature pressure vessel applications. Proper material comparison is essential to ensure safety and performance.
Looking for SA387 Gr 12 Class 2 alloy steel plates or certified equivalents? Gnee Steel offers global supply, full certification, and customized processing-contact us today for a fast quotation!
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What is SA 387 GR 12 material?
Engineered for use in elevated temperature service, ASME SA387 Grade 12 is a chrome molybdenum carbon alloy steel for use in weldable pressure vessels and industrial boilers.
What is the difference between A387 GR 11 and A387 GR 22?
Grade 11: Contains approximately 1% chromium and 0.5% molybdenum. Grade 22: Contains about 2.25% molybdenum and 1% chromium. This higher molybdenum content enhances its strength and resistance to high temperatures.
Is SA 387 low alloy steel?
ASTM A387, ASME SA 387, is one of our most popular products. It is a Low Alloy sSteel pressure vessel quality steel for high temperatures. We have a wide range of plate sizes available and Thickness range from 6 - 100mm.
What is SA 387 GR 11 Cl 2 equivalent material?
Sa 387 Gr 11 Equivalent Material is the ASME SA387 in the US markets with the European Union having modules in 13CrMoSi5-5 grade. The Sa 387 Gr 11 Cl 2 Equivalent Material is the SA387-11-2 of the ASME and ASTM standard.
What is the temperature range for SA 387 GR 11?
In the lower end of the temperature range SA 387 Gr 11 (1150 °F min tempering temperature) , and SA 387 Gr 22 (1250 °F min tempering temperature) are used. These grades can be specified in either class 1 or 2 and can also be provided in the Normalized & Tempered or Quenched and Tempered.