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KUNFENGs has lot of ASTM A387 GRADE 22/21L steel plate, which can be made into different kind of air storage tank, reaction still, flange, waste gas cleaning tower, separator, chemical tower, heat exchanger, storage tank, etc.
ASTM A387 GRADE 21/21L is a kind of Chromium-Molybdenum alloy steel plate, intended for welded boiler and pressure vessels which designed for elevated temperature service.
ASTM A387 GRADE 21 steel plate has two class according its tensile strength level, ASTM A387 Grade 21 Class 1 and ASTM A387 Grade 21 Class 2. A387 GRADE 22L only has class 1.
|
GRADE |
C |
Mn |
P max |
S max |
Si |
Cr |
Mo |
|
A387 GRADE 21 |
0.05-0.15 |
0.30-0.60 |
0.035 |
0.035 |
≤0.50 |
2.75-3.25 |
0.90-1.10 |
|
A387 GRADE 21L |
≤0.10 |
0.30-0.60 |
0.035 |
0.035 |
≤0.50 |
2.75-3.25 |
0.90-1.10 |
|
Grade
|
Tensile strength |
Yield strength min |
Elongation % min |
|||
|
ksi |
Mpa |
ksi |
Mpa |
In 8 in. |
In 2 in. |
|
|
Grade 21/21L Class 1 |
60-85 |
415-585 |
30 |
205 |
… |
18 |
|
Grade |
Tensile strength |
Yield strength min |
Elongation % min |
|||
|
ksi |
Mpa |
ksi |
Mpa |
In 8 in. |
In 2 in. |
|
|
Grade 21 Class 2 |
75-100 |
515-690 |
45 |
310 |
… |
18 |
General requirement: ASTM A20/A20M.
Heat treatment: Annealing, normalizing and tempering, accelerated cooled and tempered.
Our inspection equipment include x-ray crack detection room, x ray generator, type 435 industrial washing machine.
Processing items: welding, drilling, edge milling, cutting, bending, heat treatment, shot blasting.
Heat treatment: annealing, quenching, tempering, hardening and tempering.
Product size: As customers design.
