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ASTM A387 GRADE 21/21L steel work/steel structure/steel spare parts

ASTM A387 GRADE 21/21L steel work/steel structure/steel spare parts

Katalor Enterprises has lot of ASTM A387 GRADE 22/21L steel plate, which can be made into different kind of air storage tank, reaction still,

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Product Description

Katalor Enterprises 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.

The chemical composition of ASTM A387 Grade 21/21L steelwork, steel structure, steel spare parts

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

The mechanical property of ASTM A387 Grade 21/21L Class 1

 

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

The mechanical property of ASTM A387 Grade 21L Class 2

 

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.

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