ASTM A514/A514M — Quenched and tempered high-strength alloy structural steel plates
Grades
Gr.A, Gr.B, Gr.E, Gr.F, Gr.H, Gr.P, Gr.Q, Gr.S
Chemical composition and mechanical properties
| Grade | Chemical composition | Mechanical properties |
|---|---|---|
| Gr.A | C≤0.14, Mn≤0.90, P≤0.035, S≤0.040 | Rm 310-415 MPa, Rp0.2 ≥165 MPa, A≥27% |
| Gr.B | C≤0.17, Mn≤1.20, P≤0.035, S≤0.040 | Rm 345-450 MPa, Rp0.2 ≥185 MPa, A≥25% |
| Gr.E | C≤0.20, Mn≤0.70, P≤0.025, S≤0.025, Si 0.13-0.32, Ni 4.75-5.25 | Rm ≥480 MPa, Rp0.2 ≥275 MPa, A≥21%, Akv≥20J at -100℃, normalizing |
Application scope
ASTM A514/A514M specifies high-strength alloy structural steel plates delivered in quenched and tempered condition, covering grades Gr.A, Gr.B, Gr.E, Gr.F to Gr.S. These plates undergo alloying and heat treatment to achieve high yield strength, good hardenability and low-temperature impact toughness, and weldability. They are primarily intended for load-bearing structures and heavy-duty mechanical components that are connected by welding.
Typical applications
It is widely used in high-stress structural components of engineering machinery, excavator booms, crane booms and mining crushing equipment, as well as in heavy-duty equipment such as pressure vessels, bridge components and heavy truck frames; with its high strength, it can reduce plate thickness, reduce the weight of the whole machine and improve load-bearing and impact resistance, making it suitable for key load-bearing components that are welded and repeatedly subjected to heavy loads and impacts.
