In common engineering projects, the most frequently used materials are:
Q235B, suitable for standard environments.
Q345B and Q355B, offering higher strength.
Q420, used for high-load and deep-buried applications.
Export projects often utilize S235 and S355.
American standard projects typically feature A36, A572, and A252.
The oil and gas industry is even more familiar with these:
J55, K55, N80, L80, P110—each grade corresponds to different well depths.
At PANDAPIPE, when a client says, “Just give me any material,” we usually ask a few more questions. It’s not meddling—it’s because once the wrong material is chosen, there’s little room for correction later.
