ASME SA387 Grade 12 Class 2

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.
The material benefits from added chromium which provides excellent corrosion and oxidation resistance making it ideal for sour service applications in the oil and gas industry.
Masteel stocks SA387 Grade 12 Class 2 and can dispatch to any destination, worldwide. All our plates come with mill certification and stampings.
 

Equivalents

DesignationNominal Chromium Content (%)Nominal Molybdenum Content (%)
A387 Grade 121.00%0.50%

Chromium & Molybdenum content (according to the ASME specification):

DesignationRequirementGrade 12
A387 Grade 12Tensile strength, ksi [MPA]65 to 85 [450 to 585]
Yield strength, min, ksi [MPa]/(0.2% offset)40 [275]
Elongation in 8 in. [200mm], min %19
Elongation in 2 in. [50mm], min, %22
Reduction of area, min %

Tensile Requirements for Class 2 Plates

BSENASTM/ASMEDIN
620B13CrMo45A/SA387-12-213CrMo44

Chemical Composition of ASME SA387 Grade 12 Class 2

  
Carbon (C)%
Heat Analysis:
Product Analysis:
0.05 - 0.17
0.04 - 0.17
Manganese (Mn)%
Heat Analysis:
Product Analysis:
0.40 - 0.65
0.35 - 0.73
Phosphorus (P)%
Heat Analysis:
Product Analysis:
0.035
0.035
Sulphur (S) (Max)%
Heat Analysis:
Product Analysis:
0.035
0.035
Silicon (Si)%
Heat Analysis:
Product Analysis:
0.15 - 0.40
0.13 - 0.45
Chromium (Cr)%
Heat Analysis:
Product Analysis:
0.80 - 1.15
0.74 - 1.21
Molybdenum (Mo)%
Heat Analysis:
Product Analysis:
0.45 - 0.60
0.40 - 0.65