ASTM A553 / A553M
This specification covers 8 and 9 % nickel alloy steel plates for use in the water quenched and tempered condition intended for the fabrication of welded pressure vessels.Material under this specification is available in two types having different chemical composition.Plates produced under this specification are subject to impact testing at −320°F [−195°C] for Type 1, and −275°F [−170°C] for Type 2 or at such other temperatures as are agreed upon.The maximum thickness of plates is limited only by the capacity of the material to meet the specified mechanical property requirements; however, current mill practice normally limits this material to 2 in. [50 mm] max.This material is susceptible to magnetization. Use of magnets in handling after heat treatment should be avoided if residual magnetism would be detrimental to subsequent fabrication or service.
| Grades | Description |
|---|---|
| Type 1 | - |
| Type 2 | - |
Chemical Properties
| Grade | Carbon, maxA | Manganese | Phosphorus,maxA | Sulfur,maxA | Silicon | Nickel |
|---|---|---|---|---|---|---|
| Type 1 | 0.13 | 0.98 | 0.015 | 0.015 | 0.13–0.45 | 8.40–9.60 |
| Type 2 | 0.13 | 0.98 | 0.015 | 0.015 | 0.13–0.45 | 7.40–8.60 |
Note: A Applies to both heat and product analyses.
B Silicon may be less than 0.15 %, provided total aluminum is 0.030 % or over, or provided acid soluble aluminum is 0.025 % or over.
C Silicon may be less than 0.13 %, provided total aluminum is 0.030 % or over, or provided acid soluble aluminum is 0.025 % or over.
Mechanical Properties
|
Tensile strength,min: ksi [MPa] |
Yield strength (0.2 % offset), min, ksi [MPa] | Elongation in 2 in. [50 mm] min, %A |
|---|---|---|
| 100 to 120 [690–825] | 85 [585] | 20.0 |
