Everything You Need To Know About ASTM A516 GR. 70 HIC Plates

When selecting the right materials for your equipment or machinery, especially in the petrochemical and oil and gas industries, choosing materials that can withstand harsh conditions, extreme temperatures, and exposure to corrosive elements is important. And this is where ASTM A516 GR. 70 HIC plates come in handy. These high-strength, low-alloy steel plates are designed to resist the effects of hydrogen-induced cracking (HIC) in wet H2S corrosive environments, making them an ideal choice for various applications in the industries above. In this blog post, we’ll provide all the information you need about ASTM A516 GR. 70 HIC plates.

What Are ASTM A516 GR. 70 HIC Plates

ASTM A516 GR. 70 HIC plates are high-strength, low-alloy steel plates designed to resist the effects of hydrogen-induced cracking (HIC). HIC is a form of corrosion that occurs when hydrogen molecules penetrate the steel and weaken it from within. It’s caused by exposure to wet hydrogen sulfide (H2S) environments typical in the oil and gas industries. The plates are made from carbon steel, including small amounts of elements such as silicon, phosphorus, sulfur, and manganese. ASTM A516 GR. 70 HIC plates are usually normalized, with the addition of fine-grain elements to enhance their toughness and ductility.

What Are The Applications Of These Plates

ASTM A516 GR. 70 HIC plates are widely used in the petrochemical, oil and gas industries and other industrial applications involving exposure to wet H2S corrosive environments. They are applied in constructing pressure vessels, storage tanks, pipelines, heat exchangers, and other processing equipment exposed to HIC. The plates are also used in welding applications, particularly in the fabrication of weldable pressure vessels and piping components.

What Are The Properties Of These Plates

ASTM A516 GR. 70 HIC plates have several properties that make them ideal for harsh, corrosive environments. They have excellent resistance to HIC, meaning they are unlikely to crack or fail when exposed to H2S. The plates also have high tensile strength, with a minimum yield strength of 38 KSI and a minimum tensile strength of 70 KSI. They have good weldability, making fabricating and welding them into various shapes and structures easy. In addition, the plates have a low carbon content, which makes them less susceptible to embrittlement.

How Are These Plates Tested

To ensure that ASTM A516 GR. 70 HIC plates meet the required standards and specifications; they undergo rigorous testing before and after fabrication. These tests include macroscopic and microscopic microstructure examination, Charpy V-notch impact testing at different temperatures, and HIC testing to verify their resistance to hydrogen-induced cracking. The plates are also ultrasonically tested to detect any internal flaws or defects.

Where Can You Get These Plates

Suppose you are looking for high-quality ASTM A516 GR. IT’S IMPORTANT TO SOURCE 70 HIC plates that meet the required standards and specifications from a reliable and trusted supplier. Make sure that the supplier has a reputation for providing quality products and a wide selection of sizes and thicknesses to choose from. You should also ensure that the supplier provides prompt and efficient delivery and offers competitive pricing.


In conclusion, if you’re in the petrochemical, oil, and gas industries or any other industry that requires materials that can withstand harsh, corrosive environments, then ASTM A516 GR. 70 HIC plates are an excellent choice. These plates offer excellent resistance to hydrogen-induced cracking, high tensile strength, and good weldability, making them ideal for use in pressure vessels, storage tanks, pipelines, and other processing equipment. Ensure that you source these plates from a reputable supplier to get high-quality, reliable products that meet the required specifications.


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