12Cr1MoVg boiler tube is an alloy high-pressure boiler tube, which belongs to alloy steel. It is based on high-quality carbon structural steel and appropriately adds one or several alloy elements to improve the mechanical properties, toughness and hardenability of the steel.
Chemical composition of 12Cr1MoVG seamless boiler tube: carbon: 0.08~0.15, silicon: 0.17~0.37, manganese: 0.40~0.70, chromium: 0.9~1.2, molybdenum: 0.25~0.35, vanadium: 0.15~0.30, phosphorus ≤0.025, sulfur: ≤0.010
Mechanical properties of 12Cr1MoVG high-pressure boiler tube: tensile strength 470~640MPa, yield strength ≥255, elongation after break in the longitudinal direction ≥21, elongation after break in the transverse direction: ≥19, impact energy in the longitudinal direction ≥40, impact energy in the transverse direction ≥27, Brinell Hardness 135~195HBW, Vickers hardness 140~205HV
Seamless steel pipes made of 12Cr1MoVg steel pipes are widely used in hydraulic props, high-pressure gas cylinders, high-pressure boilers, fertilizer equipment, petroleum cracking, automobile half bushings, diesel engines, hydraulic pipe fittings and other pipes.
Heat treatment for GB 5310 12Cr1MoVG High Pressure Boiler Tubes
| Grade | Heat treatment |
| 12Cr1MoVG | 980 ℃～1 020 ℃,Normalizing,980 °C ~ 1 020 °C normalizing, when the wall thickness is greater than 30 mm, forced cooling; 720 °C ~ 760 °C tempering. |
Chemical composition of GB 5310 12Cr1MoVG pipe
| Grade | Chemical Composition(%) | |||||||||
| C | Si | Mn | Cr | Mo | V | Ni | Cu | P | S | |
| Max | ||||||||||
| 12Cr1MoVG | 0.08～0.15 | 0.17～0.37 | 0.40～0.70 | 0.90～1.20 | 0.25～0.35 | 0.15～0.30 | ≤0.30 | ≤0.20 | 0.025 | 0.020 |
12Cr1MoVG high pressure boiler tube
Mechanical properties of GB 5310 12Cr1MoVG steel pipe
| Steel Pipe | Tensile properties | Impact energy(Akv),J | ||||
| Tensile strength (MPa) |
Yield Strength (MPa) |
Elongation % |
Portrait | Landscape | ||
| Portrait | Landscape | |||||
| Max | ||||||
| 12Cr1MoVG | 470～640 | 255 | 21 | 19 | 40 | 27 |
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