E = Young's Modulus of Elasticity (N/m2, lb/in2, psi) Elasticity is property of A36 steel indicating how it will restore it to its original shape after distortion. A36 steel Modulus of Elasticity, A36 steel Young's Modulus is 200 GPa (29,000 ksi). The A36 steel Poisson's Ratio is 0.26, and A36 steel Shear Modulus is 75 GPa (10,900 ksi). API 5L X100 PSL2 Seamless Pipe X100 Grade Steel Pipe API 5L Grade B Seamless & Welded Line pipe is used mainly in Oil & Gas industry where they need to setup very long pipeline but in API line pipe there are so many grades like API 5L A25 (and the following "X" Grades), X42, X46, X52, X56, X60, X65, X70, X80 PSL-1, PSL-2.
Grade A Carbon Steel (ASTM A53, A523, API 5L PSL1 ) Minimum Yield Strength:30,000 psi Maximum Yield Strength:None Minimum Tensile Strength:48,000 psi Notes:This grade may be used for standard pipe, line pipe, or conduit pipeas specified in the various ASTM and API specifications. Grade B Carbon Steel (ASTM A53, A523, API  Seamless Steel Pipe-HELICAL WELDED STEEL Tianjin Xinyue Steel Group main prodects:ASTM A252 Spiral Steel Pipe,ASTM A106 GR B Carbon Steel Pipe,API 5L GR B Seamless Steel Pipe,ASTM A53 GR B Black Steel Pipe,HELICAL WELDED STEEL PIPE,Longitudinal Submerged Arc Welded steel Pipe. Strengthhardness statistical correlation in API X65 steel Hashemi  reviewed correction factors for the safe operation of API 5L X65 pipelines, in this research Vickers hardness data from 100 tested API 5L X65 pipes were used to derive strength
Steel, API 5L X65 (Fikret Mert Veral) 448:531:7.8:Steel, high strength alloy ASTM A514:690:760:7.8:Steel, prestressing strands: Elastic Properties Young Modulus Stength European Standard Ductility Young's Modulus Non-Ferrous Modulus of Elasticity Steel Bolts Strength Iron Steel Modulus API 5L Grade B PipeAPI 5L Carbon Steel PipeAPI 5L API 5L Grade B Line Pipe Physical Properties Line pipe grade designations come from API Spec 5L Specification for Line Pipe. Standard Line Pipe has grade designation A and B. Stronger grades have the designation X followed by the specified minimum yield strength of the pipe steel, measured in kilopounds per square inch (abbreviated ksi), e.g. X60 for pipe having a minimum yield strength of 60 ksi.