Oil Cracking Carbon Steel Tube GB9948 15CrMo 1Cr2Mo Heat Resistant Steels Material
GB9948 15CrMo 1Cr2Mo 1Cr5Mo Seamless Alloy Steel Tubing Oil Cracking Tube 18 * 4mm 168 * 9.5mm
Product Standard: GB9948
Main steel grades: 10,20,12CrMo,15CrMo,1Cr2Mo,1Cr5Mo
Application: Gb9948-2013 Oil cracking pipes are used to make high-quality carbon-structured steels, alloy steels and stainless heat-resistant steels, such as steam boiler pipes with high pressure and above. These boiler tubes are operated at high temperatures and pressures, Oxidation and corrosion are easy to occur, therefore, steel pipes are required to have high lasting strength, high antioxidant properties, and have good tissue stability.
Chemical Requirements & Mechanical properties:
| Standard | Grade | Chemical Composition(％) | |||||||
| C | Si | Mn | P | S | Cr | Mo | Ni | ||
| GB9948 | 10 | 0.07～0.14 | 0.17～0.37 | 0.35～0.65 | ≤0.035 | ≤0.035 | ≤0.15 | / | ≤0.25 |
| 20 | 0.17～0.24 | 0.17～0.37 | 0.35～0.65 | ≤0.035 | ≤0.035 | ≤0.25 | / | ≤0.25 | |
| 15CrMo | 0.12～0.18 | 0.17～0.37 | 0.40～0.70 | ≤0.035 | ≤0.035 | 0.80～1.10 | 0.40～0.55 | ≤0.30 | |
| 1Cr2Mo | ≤0.15 | 0.50～1.00 | 0.30～0.60 | ≤0.035 | ≤0.030 | 2.15～2.85 | 0.45～0.65 | / | |
| 1Cr5Mo | ≤0.15 | ≤0.50 | ≤0.60 | ≤0.035 | ≤0.030 | 4.00～6.00 | 0.45～0.60 | ≤0.60 | |
| Standard | Grade | TS(MPa) | YS(MPa) | Elongation(％) | AK(J) | Hardness(HB) | Delivery Status |
| GB9948 | 10 | 330～490 | ≥205 | ≥24 | / | / | normalized |
| 20 | 410～550 | ≥245 | ≥21 | ≥39 | / | normalized | |
| 15CrMo | 440～640 | ≥235 | ≥21 | ≥47 | ≤170 | Normalized+ tempered | |
| 1Cr2Mo | ≥390 | ≥175 | ≥22 | ≥92 | ≤179 | Normalized+ tempered | |
| 1Cr5Mo | ≥390 | ≥195 | ≥22 | ≥92 | ≤187 | annealed |
Mark: As required.
Inspection and Test: chemical composition test, mechanical properties test(tensile, yield, elongation), process properties test(flatting, flaring, bending, hardness, impact, etc.), appearance and size test, non-destructive inspection test, hydrostastic test.
Delivery status: Annealed, normalized, normalized+Tempered, etc.
Surface treatment: oil impregnation, paint, passivation, phosphating, shot blasting etc.
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