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ASTM A516 Grade 70 Plate – Composition, Properties and Uses

ASTM A516 Grade 70 Plate - Composition Properties and Uses

ASME SA 516 Gr.70 Plate is a high-quality carbon steel plate used extensively in various industrial applications. This grade 70 plate offers superior performance and durability, ideal for demanding environments. It is a go-to choice for manufacturers in the oil, gas, and petrochemical industries. If you want to familiarize yourself with this material, here is a comprehensive Sa 516 gr 70 carbon steel plate guide.



What is ASTM A516 Grade 70 Plate?

NACE MR 1075 plates are high-strength steel plates with excellent corrosion resistance compared to other carbon steel grade plates. They feature higher tensile and yield strength, greater toughness, and better weldability with lower carbon content. They typically have a higher range of elements, such as phosphorus, sulfur, manganese, and silicon which helps the technology retain flexibility even at subzero temperatures. These plates are mainly used for pressure vessel applications where superior notch toughness is required under low and elevated operating temperature conditions.

ASTM A516 Gr 70 Plate Chemical Composition

The chemical composition of ASTM A516 Grade 70 primarily consists of carbon, manganese, phosphorus, and sulfur, silicon, and trace amounts of different elements. The manganese content is around 0.85-1.20%, making it suitable for welding. The sulfur content is kept under 0.015%, while the phosphorus content is under 0.025%. The plate’s chemical composition is crucial to ensure its strength and resistance to wear and tear in various environments.

Chemical Composition (Percentage %)
C Si Mn P S Al Cr Cu Ni Mo Nb Ti V
0.10/ 0.22 0.6 1/ 1.7 0.03 0.03 0.02 0.3 0.3 0.3 0.08 0.01 0.03 0.02

ASTM A516 Grade 70 Plate Mechanical Properties

The mechanical properties of the ASME SA 516 Gr.70 Plate make it highly sought after. The plate has a yield strength of 38 ki (kilopond force per square inch), a tensile strength of 70 ki, and an elongation of 21%. These mechanical properties make it ideal for high-temperature environments and pressure vessel applications.

Mechanical Properties
Tensile Strength (N/mm2) Yield stress/ min (N/mm2)
510/ 650 335

ASTM A516 Grade 70 Plate Equivalents

British Standard European Norm ASTM/ASME DIN
BS1501-224-490A/B EN10028 P355GH A/SA516 – Grade 70

ASTM A516 Grade 70 Plate Corrosion Resistance

ASTM A516 Gr 70 plates boast excellent corrosion resistance to various chemicals, including chlorine, hydrogen sulfide, sulfuric acid, and other harsh environments. Adding chromium, molybdenum, and nickel enhances its resistance to pitting and crevice corrosion. The plate’s corrosion resistance is crucial in various industries, including marine, petrochemical, and chemical processing.

ASTM A516 Gr 70 Plate Heat Treatment

Heat treatment of Grade 70 plates involves heating the steel plate to a temperature between 900-1100 °C and cooling it to room temperature. It is important to maintain even temperatures throughout the process to ensure uniformity of material properties. Depending on the desired result, the heat treatment may include normalizing, annealing, quenching, and tempering processes. For these treatments to be effective, they must be carefully monitored and controlled to achieve the best performance from the metal plate.

ASTM A516 Grade 70 Plate Uses

ASTM A516 Grade 70 Plate is a medium-carbon alloy steel plate used primarily in pressure vessels. It offers excellent notch toughness, flexibility, exceptional weld ability, and good impact strength. Commonly known applications of ASTM A516 Plate are found in special boiler parts, low-temperature pressure vessels, and offshore oil drilling rigs, heat exchangers, valves and storage tanks.


ASME SA 516 Gr.70 Plate is a high-quality carbon steel plate with outstanding mechanical properties and corrosion resistance. Its chemical composition, mechanical properties, corrosion resistance, and production processes make it a top-performing material in various applications. This guide provides insights into the material, its properties, and its applications. For the most demanding environments and applications, ASTM A516 Grade 70 plate is the go-to choice for manufacturers looking for strength, durability, and resistance to wear and tear.

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