What is difference between ASTM A105N and BS970 070M20?

ASTM A105N is a standard specification for carbon steel forged fittings, flanges, and valves for pressure piping applications, emphasizing high strength and weldability at elevated temperatures. In contrast, BS970 070M20 is a British standard for carbon steel with specific mechanical properties, commonly used in various engineering applications. The primary differences lie in their composition, mechanical properties, and the applicable standards, as ASTM A105N is often used in North American applications, while BS970 070M20 is more prevalent in the UK and other regions following British standards. Additionally, A105N includes a requirement for normalization (denoted by the "N"), while BS970 070M20 does not have such a specification.