GRADE GUIDE · A516 GR70

ASTM A516 Gr.70 pressure-vessel plate off-cuts

A516 Gr.70 is the standard carbon steel plate for pressure vessels and boilers in moderate and low-temperature service — fine-grained, tough, and made to be welded. Grade 70 marks the tensile band (485–620 MPa) and is the default vessel plate across Gulf fabrication yards.

Also listed as: ASME SA516 Gr.70 · P265GH/P355GH (EN, near) · Gr.60 / Gr.65 siblings

Live A516 Gr70 stock

Subject to Prior Sale and Final Availability Confirmation.

Any yard building air receivers, LPG bullets, separators, heat-exchanger shells or storage tanks in the region runs on A516 Gr.70. The specification's point is predictability under welding and pressure: fine grain practice, controlled chemistry, and optional normalising or impact testing for colder duty. The certificate — usually stamped SA516 for ASME code work — travels with the plate and matters as much as the steel.

Off-cuts from vessel work are typically generous: nozzle drops, shell ring remnants, test-plate surplus in serious thicknesses. For repair patches, saddle plates, blinds and small vessels they carry the full pedigree at surplus prices — check the MTC badge and the exact thickness on each listing.

Common questions

What is the difference between A516 Gr.70 and A36 plate?

A516 is vessel quality: tighter chemistry, fine grain, guaranteed toughness options and higher tensile. A36 is structural plate. They overlap in look, never in paperwork — pressure work requires the A516 certificate.

When does A516 plate need to be normalised?

Above 40 mm thickness the specification requires it; below that it is a purchaser's option, commonly invoked for low-temperature or sour service. The certificate states the delivery condition.

Can A516 Gr.70 be used for sour (H2S) service?

Frequently, with additional requirements — HIC testing and hardness limits per NACE MR0175 are ordered on top of the base spec. Only the certificate shows whether a given plate was tested for it.

Related grades