... carbon steel pipe Certificates: API, ISO9001 OD:1/2inch-30inch W.T.:2MM-60MM. Material: 20#,45#,Q345B, Q235B,ST37 ST42. carbon steel pipeYineng ... CSt45-4DIN1626345#ASTM A1045CK45416Mn/Q345BA210-CSt52DIN1629St52.4DIN1629537Mn5J55Note1PackingPlastic Cap, black painting, steel strip.2Payment terms30% T/T in advance, 70% T/T ... machinery, high and low pressure boiler and other industries. carbon steel pipe