Seamless steel pipe Q245R grade

20G seamless is a high-quality carbon structural steel, boiler material, the carbon content of 0.17-0.24%, tensile strength of 410Mpa, yield point 230-250Mpa.

Mechnical property for Q245R Pressure vessel steel:

Thickness (mm)
Q245R > 3 ≤ 16 > 16 ≤ 36 > 36 ≤ 60 >60 ≤ 100 >100
Yield strength (≥Mpa) 245 235 225 205 185
Tensile strength (Mpa) 400-520 390-510 380-500

Chemical composition for Q245R Pressure vessel steel (Heat Analysis Max%)

Main chemical elements composition of Q245R
C Si Mn P S Alt (min.)
0.20 0.35 0.50-1.00 0.025 0.015 0.020
57mm cutting end
57mm cutting end
Out diameter 42mm all
Out diameter 42mm all
12mm wall thickness
12mm wall thickness
57mm all
57mm all

Grade 20G Seamless Steel Boiler Pipe is applicable to seamless for making steam boiler whose pressure is high or higher and seamless used as pipelines.

20G seamless steel pipe is a high-quality carbon structural steel, boiler material, the carbon content of 0.17-0.24%, tensile strength of 410Mpa, yield point 230-250Mpa. Is our main production of steel, we can provide 20G Seamless pipe with high quality and competitive price. Here to introduce you to our 20G seamless pipe basic chemical properties and mechanical properties.

Chemical Compositions(%) of GB5310 20G:
Chemical elements Data
Carbon 0.17-0.24
Silicon 0.17-0.37
Manganese 0.70-1.00
Phosphorus(max) 0.03
Sulfur(max) 0.03
Chromium(max) 0.25
Molybdenum(max) 0.15
Cuprum(max) 0.2
Nickel(max) 0.25
Vanadium(max) 0.08
Mechanical Properties of GB5310 20G:
Properties Data
Yield Strength (Mpa) ≥415
Tensile Strength (Mpa) 240
Elongation (%) 22
The W.T. tolerance of GB5310 20G:
W.T.(S) Tolerance of W.T.
<3.5  +15%(+0.48mm min)
 -10%(+0.32mm min)
3.5-20 +15%,-10%
>20 D<219 ±10%
D≥219 +12.5%,-10%
Additional Condition

UT(Ultrasonic examination), AR(As Hot Rolled only), TMCP(Thermal Mechanical Control Processing), N(Normalized), Q+T(Quenched and Tempered),Z Direction Test(Z15,Z25,Z35), Charpy V-Notch Impact Test, The Third Party Test (such as SGS Test), Coated or Shot Blasting and Painting.

GB5310 20G boiler steel pipe Application

GB5310 20G are mainly used for pressure vessels, machinery, pipe fittings, oil and chemical industry.

GB5310 20G boiler steel pipe Other Name

GB5310 20G boiler steel pipe, 20G boiler steel pipe, 20G boiler pipe

is used in these industries:
  • Steam Boilers
  • Power Generation
  • Fossil Fuel Plants
  • Electric Power Plants
  • Industrial Processing Plants
  • Cogeneration Facilities
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