What is ASTM A516 Grade 70?

What is ASTM A516 Grade 70? And Why We Use This Steel Grade?

IBC supply high quality carbon steel plate for boiler and pressure vessel fabrication which is ideally suited to the high standards set by the oil, gas and petrochemical industry. This is why we stock an extensive range of carbon plates according to ASTM A516 Grade 70.

Firstly, let’s see what is ASTM A516 Grade 70.

It is a boiler / pressure vessel quality of steel plate for use in low to moderate services. It has improved notch toughness. A516 GR. 70 steel plate is equivalent to the P355GH and 490B grades.

ASTM A516 Grade 70 Plate is also called out as ASME SA516-70. This steel plate grade is a medium carbon alloy that also contains amounts of manganese, phosphorus, sulfur, and silicon.

Pressure Vessel Steel Plate-1

A516 is primarily used for service in welded pressure vessels where improved notch toughness is required. It is typically found in moderate and lower temperature applications. A516 is sometimes called PVQ516. Supplementary testing such as Charpy Impacts, Ultrasonic Examination and Carbon Equivalency are available.

All plates over 1-1/2″ Thick are required to be normalized. A516 is the most popular Pressure Vessel grade of steel plate in the industry. It is produced in grades 55, 60, 65 or 70. The most common is Grade 70 or called out A516-70.

Secondly, we could see the properties of this steel grade. Chemical composition and physical properties.

Chemical Composition of ASTM A516 Grade 70

Carbon (C) %12.5mm or less0.27
 12,5mm ~ 50mm0.28
 50mm ~ 100mm0.30
 100mm ~ 200mm0.31
Manganese (Mn) %12.5mm or less 
 Heat Analysis0.85 ~ 1.20
 Product Analysis0.79 ~ 1.30
 Over 12.5mm 
 Heat Analysis0.85 ~ 1.20
 Product Analysis0.79 ~ 1.30
Phosphorus (P) %Max0.035
Sulphur (S) %Max0.035
Silicon (Si) %Heat Analysis0.15 ~ 0.40
 Product Analysis0.13 ~ 0.45

Physical Properties of ASTM A516 Grade 70

The most common is Grade 70 or called out A516-70.

  • Tensile Strength: 70-90 ksi
  • Yield Strength: 38 ksi
Physical Properties of ASTM A516 Grade 70

Typical Uses

A516-70 plate is a high strength, low alloy steel plate that offers an optimum combination of strength, weldability and notch toughness.

Applications include:

  • Bridges
  • Buildings
  • Automotive and truck parts
  • Railroad cars
  • Cargo containers
  • Tote boxes
  • Construction equipment
  • Structural tubing
  • Lighting standards
  • Transmission poles

It is an excellent choice for service in lower than ambient temperature applications, has excellent notch toughness and is used in both pressure vessels and industrial boilers.

A516 Grade 70 offers greater tensile and yield strength when compared to ASTM A516 Grade 65 and can operate in even lower temperature service.
Our plates come with mill certification in accordance with EN10204 3.1 or EN10204 3.2. Our plates are fully traceable, usually with hard stamping and we welcome any third party or customer inspection if required which can be arranged with the client.

IBC Group provide you the steel products you need. If you need information, please contact with us.

Tel: +86-15222480985

Email: [email protected]

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