1.Application Potential:
A387/A387M specification covers chromium-molybdenum alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service.This standard covers steel A387Gr2CL1, A387Gr2CL2,A387Gr12CL1,A387Gr12CL2A387Gr11CL1,A387Gr11CL2,A387Gr22CL1,A387Gr22CL2,A387Gr21CL1,A387Gr21CL2,A387Gr5CL1,A387Gr5CL2,A387Gr9CL1,A387Gr9CL2,A387Gr21LCL1,A387Gr22LCL1and A387Gr91CL2.These plates are widely used in the fabrication of boilers and pressure vessels in industries such as shipbuilding, petrochemical and manufacturing.
2.Chemical Composition and Mechnical Property:
Chemical composition
Grade
|
Standard
|
C
|
Mn
|
S
|
P
|
Si
|
A387Gr11CL2
|
A387/A387M
|
0.04-0.17
|
0.35-0.73
|
0.035
|
0.035
|
0.44-0.86
|
A387Gr12CL2
|
A387/A387M
|
0.04-0.17
|
0.35-0.73
|
0.035
|
0.035
|
0.13-0.45
|
Mechnical Property
Grade
|
Tensile strength, ksi [MPa]
|
Yield strength, min,A ksi [MPa]
|
Elongation in 8 in. [200 mm], min, %B
|
Elongation in 2 in. [50 mm], min, %B
|
A387Gr11CL2
|
60 to 85 [415 to 585]
|
35 [240]
|
19
|
22
|
A387Gr12CL2
|
55 to 80 [380 to 550]
|
33 [230]
|
18
|
22
|
3.A387Gr11CL2,A387Gr12CL2 material shall have a coarse austenitic grain size.They shall be thermally treated either by annealing, normalizing- and -tempering, or, when
permitted by the purchaser, accelerated cooling from the austenitizing temperature by air blasting or liquid quenching,followed by tempering. Minimum tempering temperatures
shall be 620°C.For more Supplementary requirements such as S1. Vacuum Treatment,S2. Product Analysis and so on,do not hesitate to contact us,we will do our best to satisfy you.
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