GB/T 9948 12Cr5MoI seamless steel tube adopts rolling process, i.e. billet inspection→ billet blanking →billet centering →billet annular furnace heating → perforation → hot continuous rolling → pipe walking furnace reheating → sizing → cooling. With controlled rolling and cooling technology, the surface quality of 12Cr5MoI seamless steel tube is good, the dimension accuracy is high, and the structure is even. 12Cr5MoI seamless steel tube adopts complete annealing process to reduce the hardness, improve the toughness and subsequent processing performance.
Chemical Composition and Mechanical Properties of GB/T 9948 12Cr5MoI Seamless Steel Tube:
Chemical Composition % | |||||||||
12Cr5MoI | C | Si | Mn | Cr | Mo | Ni | Cu | P | S |
≤0.15 | ≤0.50 | 0.30~0.60 | 4.00~6.00 | 0.45~0.60 | ≤0.60 | ≤0.20 | ≤0.025 | ≤0.015 | |
Mechanical Properties | |||||||||
Tensile strength | Yield strength | Elongation A | |||||||
415~590 Mpa | ≥205 Mpa | ≥20 % |
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