ASTM A537 standard refers to pressure vessel plates, material in heat-treated, carbon-manganese silicon steel. Based on different strength and heat treatment, it ranges to Class 1, 2 and 3.
The maximum thickness under ASTM A537 Class 1 is 100 mm [4 inch], and 150 mm [6 inch] for Class 2 and Class 3.
Referenced Documents
ASTM Standards:
- A20/A20M: Specification for General Requirements for Pressure Vessel Plates
- A435/A435: For Straight-Beam Ultrasonic Examination of Steel Plate
- A577/A577M: For Ultrasonic Angle-Beam Examination of Steel Plates
- A578/A578M: For Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
Manufacturing Notes:
Steel Plate under ASTM A537 Class 1, 2 and 3 shall be killed steel and comply with fine austenitic grain size requirement of Specification A20/A20M.
Heat Treatment Methods
All plates under ASTM A537 shall be heat treated as follows:
ASTM A537 Class 1 plates shall be normalized.
Class 2 and Class 3 plates shall be quenched and tempered. The tempering temperature for Class 2 plates shall not be less than 1100°F [595°C] and not less than 1150°F [620°C] for Class 3 plates.
Chemical Requirements of ASTM A537 Class 1, 2 and 3
The steel shall conform to the chemical requirements shown in Table 1 unless otherwise modified in accordance with Supplementary Requirement S17, Vacuum Carbon-Deoxidized STeel, in Specification A20/A20M.
Table 1:
Element | Heat Analysis | Product Analysis |
|---|---|---|
Carbon, max A | 0.24 | |
Manganese (Tk≤40 mm or 1-1/2 in) | 0.70-1.35 | 0.64-1.46 |
Manganese B | 1.00-1.60 | 0.92-1.72 |
Phosphorus, max A | 0.025 | |
Sulfur, max A | 0.025 | |
Silicon | 0.15-0.50 | 0.13-0.55 |
Copper, max | 0.35 | 0.38 |
Nickel, max | 0.25 | 0.28 |
Chromium, max | 0.25 | 0.29 |
Molybdenum, max | 0.08 | 0.09 |
A: Applies to both heat and product analysis.
B: Manganese may exceed 1.35% on heat analysis, up to a maximum of 1.60%, and nickel may exceed 0.25% on heat analysis, up to a maximum of 0.50%, provided the heat analysis carbon equivalent dose not exceed 0.57^ when based upon the following equation:
CE = C + Mn/5 + (Cr+Mo+V)/5 + (Ni+Cu)/15
When this option is exercised, the manganese and nickel contents on product analysis shall not exceed the heat analysis content by more than 0.12% and 0.03%, respectively.
Mechanical Requirements for A537 CL1, CL2, CL3
Tensile strength and yield strenght: The material as represented by the tension-test specimens shall conform to the requirements shown in Table 2.
For Class 2 and Class 3 plates with a nominal thickness of 3/4 in. [20 mm] and under, the 1 1/2-in. [40 mm] wide rectangular specimen may be used for the tension test, and the elongation may be determined in a 2-in. [50 mm] gage length that includes the fracture and that shows the greatest elongation.
Mechanical Properties inch and [mm] | Class 1 | Class 2 | Class 3 |
|---|---|---|---|
ksi [MPa] | ksi [MPa] | ksi [MPa] | |
Tensile Strength | | | |
2-1/2 in. and under | 70-90 | 80-100 | 80-100 |
[65 mm and under] | [485-620] | [550-690] | [550-690] |
Over 2-1/2 to 4 in | 65-85 | 75-95 | 75-95 |
[Over 65 to 100mm] | [450-585] | [515-655] | [515-655] |
Over 4 to 6 in | A | 70-90 | 70-90 |
[Over 100 to 150 mm] | A | [485-620] | [485-620] |
Yield strength, min: | | | |
2-1/2 in. and under | 50 | 60 | 55 |
[65 mm and under] | [345] | [415] | [380] |
Over 2-1/2 to 4 in | 45 | 55 | 50 |
[Over 65 to 100 mm] | [310] | [380] | [345] |
Over 4 in to 6 in | A | 46 | 40 |
[Over 100 to 150 mm] | A | [315] | [275] |
Elongation in 2 in | |||
[50 mm], min, %B | 22 | 22 | 22 |
4 in, [100 mm] and under | A | 20 | 20 |
Over 4 in [100 mm] | |||
Elongation in 8 in | |||
[200 mm], min, %B | 18 | C | C |
A: Product is not availabe in this size range.
B: See specification A20/A20M for elongation adjustments.
C: There is no requirement for elgonation in 8 in.
Our Supply Range:
Description: Carbon Steel ASTM A537 Class 1, 2, 3
Manufacturing Types: Hot Rolled
Thickness: 2mm to 150 mm
Width: 0.6m to 3m
Length: 6m, 12m, customized
Surface: Natural, Painted
Packing: Standard sea packing, bundled with streel strip.
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