ASTM A285 Grade C Steel Plate Specification

ASTM A285 standard is for carbon steel, low and intermediate tensile strength steel plates intended for fusion-welded pressure vessels.

The steel plate under ASTM A285 ranges in three grades, A, B and C, most common use is ASTM A285 Grade C plates. Which shall be made by killed, semi-killed, capped or rimmed steel practices at manufacturer's option.

For killed carbon steels only refer to below ASTM specifications.

  • A 299/A 299M: Carbon steel manganese silicon pressure vessel plates.
  • A 515/A 515M: Carbon steel for intermediate and higher temperature services of pressure vessel plates.
  • A516/A516M: Carbon steel for moderate and lower temperature pressure vessel plates.

Maximum thickness of plates is limited to 50 mm [2 inch] for all grades.


Referenced Documents:

ASTM Sandards:

  • A20/A20M: General requirements for steel plates for pressure vessels.

General Requirements and Ordering Information:

  • Testing and retesting methods, procedures, dimension tolerance, mass, quality and repair defects, marking, loading and ordering information shall comply with A20/A20M.
  • In additional to basic requirements, certain supplementary requirements are available.
  • Coils are excluded from A285 until they have been cutted to plate.

ASTM A285 Grade C Steel Plate Data Sheet

Chemical Composition:

Elements

Composition, %

Grade A

Grade B

Grade C

Carbon, maxA

0.17

0.22

0.28

Manganese, max

     Heat analysis


0.90


0.90


0.90

     Product analysis

0.98

0.98

0.98

Phosphorus, maxA

0.025

0.025

0.025

Sulfur, maxA

0.025

0.025

0.025

Mechanical Properties:

Grade A

Grade B

Grade C

ksi

[MPa]

ksi

[MPa]

ksi

[MPa]

Tensile strength

45-65

[310-450]

50-70

345-485

55-75

380-515

Yield strength, minA

24

[165]

27

[185]

30

[205]

Elongation in 8 in. or [200 mm], min, %B


27

25

23

Elongation in 2 in. or [50 mm], min, %B

30

28

27

A  Determined by either the 0.2% offset method or the 0.5% extension under load method.

B  See Specification A20/A20M for elongation adjustment.

Our Supply Range:

Description: Carbon Steel ASTM A285 Grade ​C & B & A
Manufacturing Types: Hot Rolled
Thickness: 2 to 150 mm
Width: 0.6m to 3m
Length: 6m, 12m, customized
Surface: Natural, Painted
Packing: Standard sea packing, bundled with streel strip.

Related Products:


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ASTM A515 Grade 60, 65, 70 Plate
ASTM A537 Class 1, 2 Plates
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