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A514 is a quenched and tempered high strength weldable steel plate under ASTM standards, the main use is used in the need for high tensile, high yield places, engineering vehicle lifting gear, rack used for offshore platform are generally A514Gr.Q or A514Gr.Q modified, due to thickness, its hardness between 235-290, The yield is greater than 630MPa and the tensile strength is more than 700MPa
a514 steel plate standard one of the eight common specification classes, the maximum thickness is 50mm,a514gr.b has high strength, good fatigue resistance; High toughness and low brittle transition temperature; Good cold forming performance and welding performance; It has good corrosion resistance and wear resistance. Mainly used in the need of high tensile, high yield places.
ASTM A514 GradeA
| C | Mn | P | S | SI | Ni | Cr | Mo | V | Ti | Zr | Cu | B |
| 0.15-0.21 | 0.8-1.1 | ≤0.035 | ≤0.04 | 0.4-0.8 | ~ | 0.5-0.8 | 0.18-0.28 | ~ | ~ | 0.05-0.15 | ~ | 0.0025 max |
| Thickness Inch | Yield Strength Mpa | Tensile Strength Mpa | Elongation in 50mm | Hardnees Brinell | ||||||||
| less 3/4 inch | 690 | 760-895 | 18 | 235 | ||||||||
| over 3/4 to 2 1/2 | 690 | 760-895 | 18 | ~ | ||||||||
| over 2 1/2 to 6 inch | 620 | 690-895 | 16 | ~ | ||||||||
| mark | A514GrA | A514GrB | A514GrE | A514GrF | A514GrH | A514GrP | A514GrQ | A514GrS |
| thickness | ≤ 32 | ≤ 32 | ≤ 150 | ≤ 65 | ≤ 50 | ≤ 150 | ≤ 150 | ≤ 65 |
| C | 0.15-0.21 | 0.12-0.21 | 0.12-0.2 | 0.1-0.2 | 0.12-0.21 | 0.12-0.21 | 0.14-0.21 | 0.11-0.21 |
| Mn | 0.8-1.1 | 0.7-1.0 | 0.4-0.7 | 0.6-1.0 | 0.95-1.3 | 0.45-0.7 | 0.95-1.3 | 1.1-1.5 |
| P（maximum） | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 |
| S（maximum） | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 |
| Si | 0.4-0.8 | 0.2-0.35 | 0.2-0.4 | 0.15-0.35 | 0.2-0.35 | 0.2-0.35 | 0.15-0.35 | 0.15-0.45 |
| Ni | - | - | - | 0.7-1.0 | 0.3-0.7 | 1.2-1.5 | 1.2-1.5 | - |
| Cr | 0.5-0.8 | 0.4-0.65 | 1.4-2.0 | 0.4-0.65 | 0.4-0.65 | 0.85-1.2 | 1.0-1.5 | - |
| Mo | 0.18-0.28 | 0.15-0.25 | 0.4-0.6 | 0.4-0.6 | 0.2-0.3 | 0.45-0.6 | 0.4-0.6 | 0.1-0.6 |
| V | - | 0.03-0.08 | - | 0.03-0.08 | 0.03-0.08 | - | 0.03-0.08 | 0.06 |
| Ti | - | 0.01-0.04 | 0.01-0.1 | - | - | - | - | - |
| Zr | 0.05-0.15 | - | - | - | - | - | - | - |
| Cu | - | - | - | 0.15-0.5 | - | - | - | - |
| B | 0.0025 | 0.0005-0.005 | 0.001-0.005 | 0.0005-0.006 | 0.0005-0.005 | 0.001-0.005 | - | 0.001-0.005 |
| Nb | - | - | - | - | - | - | - | 0.06 |
| thickness | strength of extensionksi(MPa) | Yield strength (minimum) ksi(MPa) | 2in.(50mm) elongation (minimum)%в | Section shrinkage is minimal |
| ≤20 | 110-130（760-895） | 100（690） | 18 | 40 |
| >20-65 | 110-130（760-895） | 100（690） | 18 | 40,50 |
| >65-150 | 100-130（690-895） | 90（620） | 16 | 50 |
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