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 (%) | ||
W.T.(mm) | |||||
16 | >16~30 | >30 | |||
45 | 590 | 335 | 325 |
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