ASTM A516 – Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service
Grade: 55
Chemical Requirements
| Elements | Grade55[380] |
| Carbon,max A,B: | |
| 1⁄2 in. [12.5 mm] and under | 0.18 |
| Over 1⁄2 in. to 2 in. [12.5 to 50 mm], incl | 0.20 |
| Over 2 in. to 4 in. [50 to 100 mm], incl | 0.22 |
| Over 4 to 8 in. [100 to 200 mm], incl | 0.24 |
| Over 8 in. [200 mm] | 0.26 |
| ManganeseB: | |
| 1⁄2 in. [12.5 mm] and under: | |
| Heat analysis | 0.60-0.90 |
| Product analysis | 0.55-0.98 |
| Over 1⁄2 in. [12.5 mm]: | |
| Heat analysis | 0.60-1.20 |
| Product analysis | 0.55-1.30 |
| Phosphorus,maxA | 0.025 |
| Sulfur, maxA | 0.025 |
| Silicon: | |
| Heat analysis | 0.15-0.40 |
| Product analysis | 0.13-0.45 |
A Applies to both heat and product analyses.
B For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50 % by heat analysis and 1.60 % by product analysis.
Tensile Requirements
| Grade55[380] | |
| Tensile strength, ksi [MPa] | 55–75 [380–515] |
| Yield strength, min,A ksi [MPa] | 30 [205] |
| Elongation in 8 in. [200 mm], min, %B | 23 |
| Elongation in 2 in. [50 mm], min, %B | 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.
