Carbon equivalent of API 5L GrB material?

Answer 1

Astm a53 grade b and a106 grade b is equivalent

Answer 2

The carbon equivalent (CE) of API 5L Grade B (GrB) material typically ranges from 0.40% to 0.45%. CE is a measure of a material's weldability and is calculated based on the carbon content, as well as other elements like manganese, silicon, and phosphorus. A lower CE indicates better weldability.