A537 CL1 Normalized Pressured Vessel Steel Plate
The maximum thickness under ASTM A537 Class 1 is 100 mm [4 inch], and 150 mm [6 inch] for Class 2 and Class 3.
The material is a normalised steel which is heat treated and as a consequence displays greater yield and tensile strength than the more standard ASTM A516 grades. The steel is ideal for use in pressurised service both in boilers and pressure vessels
| A537 class 1 Chemical Composition | |||||||||
| Grade | The Element Max (%) | ||||||||
| C | Mn | P | S | Si | Cu | Ni | Cr | Mo | |
| A537 class 1 | 0.24 | 0.92-1.72 | 0.035 | 0.035 | 0.13-0.55 | 0.38 | 0.28 | 0.29 | 0.09 |
| Grade | A537 class 1 Mechanical Property | |||
| Thickness | Yield | Tensile | Elongation | |
| A537 class 1 | mm | Min Mpa | Mpa | Min % |
| -65 | 345 | 485-620 | 22 | |
| 65-100 | 310 | 450-585 | - | |
| 100-150 | - | - | 18 | |
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.
