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Technical standard of 25CrMnSiA steel plate: GB/T 11251.
25CrMnSiA alloy structural steel hot-rolled thick steel plate, used to make various alloy structures and their parts.
Melting analysis of chemical composition of 25CrMnSiA steel plate:
| Grade | C | Si | Mn | P | S | Ni | Cr | Mo | Cu |
| 25CrMnSiA | 0.22-0.28 | 0.9-1.2 | 0.8-1.1 | ≤0.025 | ≤0.025 | ≤0.3 | 0.8-1.1 | ≤0.1 | ≤0.25 |
25CrMnSiA steelmaking process:
Raw materials (scrap steel, pig iron and molten iron)-electric furnace (100-ton electric arc furnace smelting), converter-LF furnace molten steel refining treatment-VD or VOD furnace molten steel vacuum treatment-die casting (various key die casting lines) or Continuous casting (large slab continuous caster); (50 tons of slab electroslag furnace for remelting a steel ingot)-heating (continuous furnace and soaking furnace)-steel plate rolling (4100 and 4200mm rolling mills)- Steel plate heat treatment (normalizing, tempering and tempering)-steel plate cutting inspection-storage.
Delivery status of heat treatment of 25CrMnSiA steel plate: normalizing, normalizing + annealing.
