A very popular grade used extensively within the construction industry in earth moving equipment, building / support apparatus, truck frames / bodies, oil rigs, booms, and drilling equipment just to name a few. This quenched and tempered HSLA (High Strength Low Alloy) product have both tensile / yield properties at min 100ksi.
Elements represented in percentage – (max. thickness)
| Elements | Grade B (1-1/4) |
Grade E (6) |
Grade F (2-1/2) |
Grade H (2) |
Grade Q (6) |
Grade S (2 1/2) |
|---|---|---|---|---|---|---|
| Carbon | 0.12-0.21 | 0.12-0.20 | 0.10-0.20 | 0.12-0.21 | 0.14-0.21 | 0.11-0.21 |
| Manganese | 0.70-1.00 | 0.40-0.70 | 0.60-1.00 | 0.95-1.30 | 0.95-1.30 | 1.10-1.50 |
| Phosphorus, max | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 |
| Sulfur, max | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.020 |
| Silicon | 0.20-0.35 | 0.20-0.40 | 0.15-0.35 | 0.20-0.35 | 0.15-0.35 | 0.15-0.45 |
| Nickel | – | – | 0.70-1.00 | 0.30-0.70 | 1.20-1.50 | – |
| Chromium | 0.40-0.65 | 1.40-2.00 | 0.40-0.65 | 0.40-0.65 | 1.00-1.50 | – |
| Molybdenum | 0.15-0.25 | 0.40-0.60 | 0.40-0.60 | 0.20-0.30 | 0.40-0.60 | 0.10-0.35 |
| Vanadium | 0.03-0.08 | A | 0.03-0.08 | 0.03-0.08 | 0.03-0.08 | – |
| Titanium | 0.01-0.10 | 0.01-0.10 | – | – | – | c |
| Zirconium | – | – | – | – | – | – |
| Copper | – | – | 0.15-0.50 | – | – | – |
| Boron | 0.0005-0.005 | 0.001-0.005 | 0.0005-0.006 | 0.0005-0.005 | – | 0.001-0.005 |
| Columbium, max | – | – | – | – | – | 0.06 |
| Thickness, in. (mm) | Ultimate Tensile Strength ksi (MPa) | Yield Strength min, ksi (MP) | Elongation in 2 in. (50 mm), B,C,D,E | Reduction of Area,B,C | Brinell Hardness Number |
|---|---|---|---|---|---|
| To 3/4 (20), incl | 110 to 130 (760 to 895) | 100 (690) | 18 | 40G | 235 to 293 |
| Over 3/4 to 2-1/2 (20 to 65), incl | 110 to 130 (760 to 895) | 100 (690) | 18 | 40G, 50H | – |
| Over 2-1/2 to 6 (65 to 150), incl | 100 to 130 (690 to 895) | 90 (620) | 16 | 50H | – |
