ASTM A234 Kalebu baja karbon sing ana lan baja wesi sing nganggo seamless lan welding sing ditutupi revisi paling anyar AS ASTM B16.9, MSS-SP-89, MSS-Sp-93, lan MSS-SP-95, lan MSS-SP-95, lan MSS-SP-95, lan MSS-SP-95, lan MSS-SP-95, lan MSS-SP-99 lsp.