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The following material properties are AAR specifications and will be confirmed on the Mill Test Report.
Yield Point (MPa) | Tensile Strength (MPa) | Min. 8" Elongation % | |
Grade B | 50,000 | 81,000-101,000 | 16 |
The following composition properties are AAR specifications for the TC128 grade B steel.
Grade B | |
Carbon max | 0.24% |
Manganese max | 1.00-1.65% |
Phosphorus max | 0.025% |
Sulfur max | 0.015% |
Silicon, ≤3/4" thick | 0.15-0.40% max |
Silicon, >3/4" thick | 0.15-0.50% max |
Vanadium max | 0.080% |
Copper max | 0.35% |
Nickel max | No Limit |
Chromium max | No Limit |
Molybdenum max | No Limit |
Aluminum max | 0.015-0.060% |
Columbium max | Per ASTM A20 |
Titanium max | 0.020% |
Boron max | 0.0005% |
Nitrogen max | 0.010% |
Tin max | 0.020% |
CEq max | 0.53% |
Cu+Ni+Cr+Mo max | 0.65% |
Nb+V+Ti max | 0.11% |
Ti/N max ratio | 4.0 |