seamless steel pipes for hydraulic pillar service

Steel Grade: 20, 35, 45, 27SiMn, 30MnNbRE

Standard: GB/T 17396-2009

Application: It applies to cylinder and column of colliery hydraulic support and pillar.

Sizes: O.D.: 60mm~219mm, W.T.: 4mm~35mm.

Chemical Composition, Mass Fraction(%): (45 for example)

Steel Grade C Si Mn Cr Ni Cu P S
0.42~0.50 0.17~0.37 0.50~0.80 0.25 0.25 0.20 0.035 0.035

Mechanical Properties: (45 for example)

Steel Grade (MPa) tensile strength  lower yield strength (MPa) Elongation (%)
16 >16~30 >30
45 590 335 325


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