What is the difference between A36 and A516 Gr70 steel plate?

Aug 21, 2025 Leave a message

ASTM-A516-A516M-Standard-Specification.pdf

ASTM A516 Gr 70 VS A36, ASTM A516 steel and A36 steel actually belong to different steel types. ASTM A516 steel is pressure vessel and boiler steel. ASTM A36 steel is mild steel. For the chemical content of carbon, ASTM A516 steel and A36 steel are also called carbon steel. But their properties have obvious difference.

 

ASTM A516 Gr 70 VS A36 carbon steel plate in chemical composition

 

 

  • ASTM A36 carbon steel plate chemical composition:
Grade C (t≤16mm) Si Mn P S
A36 0.26 max 0.40 max - 0.040 max 0.050 max

 

  • ASTM A516 Gr 70 carbon steel plate chemical composition:
Chemical elements Percentage % Chemical elements Percentage %
C 0.10/ 0.22 Cu 0.30
Si 0.6 Ni 0.30
Mn 1/ 1.7 Mo 0.08
P 0.03 Nb 0.01
S 0.03 Ti 0.03
Al 0.02 V 0.02
Cr 0.3    

 

 

ASTM A516 Gr 70 VS A36 carbon steel plate in mechanical properties

 

 

  • ASTM A36 carbon steel plate mechanical properties
Grade Yield strength ReH/(N/mm2) Tensile strength Rm/(N/mm2)
(3mm≤t≤16mm)
Elongation A/%
(t≤16mm) min (3mm≤t≤40mm) min
A36 250 400-550 23

 

  • ASTM A516 Gr 70 carbon steel plate mechanical properties
Grade Tensile strength
(MPa)
Minimum yield
strength (MPa)
Minimum elongation (%) gauge length
50mm 200mm
A516 Gr 70 485 - 620 260 21 17

 

 

ASTM A516 Gr 70 VS A36 carbon steel plate in application

 

 

  • ASTM A36 carbon steel plate is used in heavy machinery, industrial boilers, wagon tippers, feeders, stackers, crushers, loaders, cranes, shipping industry and supporting frames for equipment used in metallurgical and other heavy industries.
  • ASTM A516 Gr 70 steel plate is mainly used for pressure vessel and boiler, oil and gas as well as petrochemical industries.

 

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FAQ

Q: What is the difference between A36 and A516 steel?

A: It is known for its excellent notch toughness and resistance to brittle fracture. A36 is a general-purpose carbon steel grade suitable for structural applications, while A516 is specifically designed for pressure vessel applications and offers superior notch toughness.

Q: What is ASTM A516 grade 70 equivalent to?

A: P355GH
ASTM A516 GD 70 - Pressure Vessel Steel
A516 GD70 steel plate is equivalent to the P355GH and 490B grades.

Q: What is ASTM A36 steel equivalent to?

A: The ASTM A36 plate is equivalent to grades like ASTM A283C, JIS G3101 SS400, JIS G3106 SM400A, EN10025-2 S235JR, DIN17100 ST37-2, and FE360B.

Q: What is ASTM A36 steel used for?

A: ASTM A36 is used in bolted, riveted, or welded construction projects such as bridges and buildings, it is also used in forming tanks & bins and machined parts like bearing plates, fixtures, rings, and parts for agricultural equipment.

 

Other steel plate
Name Material Specification (mm) Tons Remark
Low Alloy Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo 6 - 350 5788.56 Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection
Pressure Vessel Plate Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) 3 - 300 8650 Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection
High-Strength Plate WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E 8 - 120 3086.352 Quenched and tempered
Wear-Resistant Plate NM360, NM400, NM450, NM500 6 - 150 3866.297 Quenched and tempered
Bridge Plate Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 8 - 200 2853.621 Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness