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.
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.
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