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.
Asteiron stocks SA387 Grade 12 Class 2 and can dispatch to any destination. All our plates come with mill certification and stampings.
Equivalents:
BS
EN
ASTM/ASME
DIN
620 B
13 CRMO 45
A387-12-2
13 CRMO 44
Specifications:
Chromium & Molybdenum content (according to the ASTM specification):
Designation
Nominal Chromium Content (%)
Nominal Molybdenum Content (%)
A387 Grade 12
1.00%
0.50%
Tensile Requirements for Class 2 Plates:
Designation:
Requirement:
Grade12
A387 Grade 12
Tensile strength, ksi [MPA]
65 to 85 [450 to 585]
Yield strength, min, ksi [MPa]/(0.2% offset)
43 [310]
Elongation in 8 in. [200mm], min %
18
Elongation in 2 in. [50mm], min, %
22
Reduction of area, min %
–––
Chemical Requirements:
Element
Chemical Composition (%) inc. Grade & UNS No.
Grade 12 (UNS: K11757)
Carbon:
Heat Analysis:
0.05 - 0.17
Product Analysis:
0.04 - 0.17
Manganese:
Heat Analysis:
0.40 - 0.65
Product Analysis:
0.35 - 0.73
Phosphorus:
Heat Analysis:
0.035
Product Analysis:
0.035
Sulphur (max):
Heat Analysis:
0.035
Product Analysis:
0.035
Silicon:
Heat Analysis:
0.15 - 0.40
Product Analysis:
0.13 - 0.45
Chromium:
Heat Analysis:
0.80 - 1.15
Product Analysis:
0.74 - 1.21
Molybdenum:
Heat Analysis:
0.45 - 0.60
Product Analysis:
0.40 - 0.65
Tension Test Requirements:
Material shall be tested using a test specimen will confirm to the tensile requirements as outlined in Table 2.
Other requirements:
The following requirements and testing procedures (which are not mandatory) are considered suitable for Chrome Molybdenum steel:
Vacuum treatment
Product Analysis
Additional Tension Test
Charpy V-Notch Impact Test
Drop Weight Test
High Temperature Tension Test
Ultrasonic Examination
Magnetic Particle Examination
To find out more about Asteiron's services and ASTM A387 Grade 11 Class 2 steel plates which we can supply directly to you, please do contact us.
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