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GB5310 12Cr1MoVG high pressure boiler tube

Attention:     Issuing time:2018-12-12 22:41

GB5310 12Cr1MoVG High Pressure Boiler Tube

Standard:GB 5310

GB 5310 12Cr1MoVG is applicable to seamless tubes for making steam boiler whose pressure is high or higher and seamless tubes used as pipelines.

Steel grade
20G, 20MnG, 25MnG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb.

GB5310 12Cr1MoVG boiler tube
12Cr1MoVG is a steel grade of GB5310 standard. GB5310 12Cr1MoVG high pressure boiler tube with high lasting strength, high oxidation and corrosion resistance, good organizational stability, widely used in electrical equipment.

GB5310 12Cr1MoVG high pressure boiler tube Specification
Type:Seamless Steel Pipe. 
Length:6M or specified length as required. 
Ends:Plain End、Beveled End、Treaded

Additional Info
Payment Terms:T / T, LC
Surface:Tubes will be varnished (Outside only) to prevent rust.
Marking:Standard + Steel Grade + Size + Heat No + Lot No
Package:According To Per Customers' Require
Delivery time:Tubes will be completed within 30 days, and urgent delivery time can be discussed.

Steel pipe production process: Hot rolled, Cold drawn

Delivery status of GB 5310 12Cr1MoVG high-pressure boiler tubes
The steel pipe shall be delivered in a heat treated condition.

Heat treatment:
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.

GB5310 12Cr1MoVG high pressure boiler tube Chemical Composition

Grade C Si Mn P S Cr Mo Cu Ni V
12Cr1MoVG 0.18~0.24 0.17-0.37 0.40~0.70 ≤0.03 ≤0.03 0.90~1.20 0.25~0.35 ≤0.20 ≤0.30 0.15~0.30

GB5310 12Cr1MoVG high pressure boiler tube Mechanical property

Standard grade Tensile Strength(MPa) Yield Strength(MPa) Elongation(%) Hardness(HB)
GB5310 12Cr1MoVG 470~640 ≥255 ≥ 21 /

Manufacture of high pressure and super high pressure boiler superheater tube, reheater tube, airway, the main steam pipe and so on.

Outer diameter and wall thickness

Type of steel pipe Outer diameter(mm) Tolerance
ordinary advanced
Hot rolled tube OD ≤50 ±0.40 ±0.30
>50~≤325 WT≤35 ±0.75% ±0.5%
WT>35 ±1% ±0.75%
>325   ±1% ±0.75%
WT ≤4.0 ±0.4 ±0.3
>4.0~≤20 ±10% ±7.5%
>20 OD<219 ±10% ±7.5%
OD≥219 +12.5% 
Cold drawn tube OD ≤25.4 ±0.15
>25.4~≤40 ±0.20
>40~≤50 ±0.25
>50~≤60 ±0.30
>60 ±0.5%
WT ≤2.8 ±0.2
>2.8 ±7.5%

Allowable Tolerance of the minimum wall thickness specified in the steel pipe

Type of steel pipe Wall thickness range Tolerance
ordinary advanced
Hot rolled tube WTmin≤4.0 +0.8
WTmin>4.0 +20%S
Cold drawn tube WTmin≤2.8 +0.4
WTmin>2.8 +15%S

Surface quality of GB5310 12Cr1MoVG high-pressure boiler tubes
The inner and outer surfaces of steel pipes are not allowed to have cracks, folds, crusting, rolling and separation. These defects shall be completely removed and the depth of defect removal shall not exceed 10% of the wall thickness. The actual outer diameter and wall thickness of the defect removal shall not be less than the minimum allowable for the outer diameter and wall thickness.
The allowable depth or height of the straight road on the inner and outer surfaces of the steel pipe shall comply with the following requirements:
a) cold drawn (rolled) steel pipe: not more than 4% of the nominal wall thickness, and the maximum is 0.2 mm;
b) Hot-rolled (extruded, expanded) and forged steel pipes: not more than 5% of the nominal wall thickness and a maximum of 0.4 mm.

Summary of  testing
Hydraulic test
Flattening test
Bending test
Flaring test
Low-power test
Non-metallic inclusions
Grain size
Decarburization layer
Intergranular corrosion test
Non-destructive testing

GB5310 12Cr1MoVG seamless steel pipe Packaging & Delivery

Types of Packaging:
- Bundles (hexagonal)
- Wooden Boxes
- Crates (steel/wooden)
- Special crates for U-Bend tubes with each radius separated
- Our GB5310 12Cr1MoVG seamless steel pipe packing can meet any needs of the customers.

Delivery: 7-15 days after payment


we can supply different materials for GB 5310 high-pressure boiler tubes as seamless pipe, expecially 12Cr1MoVG boiler tubes.


whatapp: +8615003171886

E-mail:jinxiaolong0221@gmail.com  ;  beitesteelpipe@gmail.com

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