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What is the ASTM steel spec equivalent to Q345R? steel plate

Q345R/SA 515 GR 60 Pressure Vessel Steel Plate The specification we supplied of the pressure vessel plate, as follows: -Material: GB 6654: 20R steel, 16MnR(Q345R) JIS G3115: SPV315, SPV355, SPV490 JIS G3127: SL2N, SL3N, SL5N, SL9N ASTM: A203, A662, A517, A537, A533 GB 3531: 16MnDR, 09MnNiDR Size: 6mm-100mm(150mm) * 1150mm-3700mm * 3000mm-18000mm Main Applications: They are widely applied to petroleume, chemistry, power station and boiler industries, and also can make reactor, heat exchanger, separator, spherical tank, the tank of oil gas, nuclear reactor pressure shell, drum boiler, liquified petroleume gas cylinder ( LP cylinder), high pressure water pipes of hydropower station, water turbin shell and other equipments or accessories.
What is the ASTM equivalent to Q345R?
Q345R astm equivalent materail is A516 Grade 70 steel, and it is Q345R equivalent ASTM material. Q345R and A516 Grade 70 plates are widely applied to petroleume, chemistry, power station and boiler industries, and also can make reactor, heat exchanger, separator, spherical tank, the tank of oil gas, nuclear reactor pressure shell, drum boiler, liquified petroleume gas cylinder ( LP cylinder), high pressure water pipes of hydropower station, water turbin shell and other equipments or accessories.
Below are the brief description of Q345R steel Vs A516 Grade 70 chemical requirement and steel tensile requirements:
chemical requirement and
Q345R steel and A516 Grade 70 steel chemical composition:
 

Grade C Si Mn P S Alt
A516 Grade 70 ≦0.27 0.13-0.45 0.79-1.60 ≦0.035 ≦0.035  
Q345R ≦0.20 ≦0.55 1.20-1.60 ≦0.025 ≦0.015 ≧0.020
Q345R steel and A516 Grade 70 steel tensile requirements:
 
Grade Yield Strength Tensile Strength Elongation
(Mpa) (MPa) (%)
A516 Grade 70 ≧260 485-620 ≧17
Q345R ≧325 500-630 ≧21
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