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Properties of ASTM 5140 steel pipe produced by China Steel Pipe Factory

From: Shandong Baote Metal Products Co., Ltd.  DATE: 2022/3/26  Hits: 4461

Properties of ASTM 5140 steel pipe produced by China Steel Pipe Factory

ASTM 5140 produced by China Steel Pipe Factory is a round steel with hollow section and no joints around it. ASTM 5140 Seamless Steel Pipe is made of solid tube blank through perforation, and then hot rolled, cold rolled or cold drawn. ASTM 5140 Steel Pipe has hollow section. Compared with solid steel such as round steel, the steel pipe has the same bendi...

ASTM 5140 produced by China Steel Pipe Factory is a round steel with hollow section and no joints around it. ASTM 5140 Seamless Steel Pipe is made of solid tube blank through perforation, and then hot rolled, cold rolled or cold drawn. ASTM 5140 Steel Pipe has hollow section. Compared with solid steel such as round steel, the steel pipe has the same bending and torsional strength and light weight. It is an economic section steel.

Theoretical calculation method of China Baote steel pipe


Calculation formula of weight per meter of ASTM 5140 steel pipe: 0.02466 * wall thickness * (outer diameter - wall thickness)

ASTM 5140 executive standard of Steel Pipe Factory


According to ASTM 5140


Chemical composition (mass fraction,%) C 0.37 ~ 0.44, Si 0.17 ~ 0.37, Mn 0.50 ~ 0.80, cr0.01 80~1.10、Ni≤0.30。

mechanical property 


Sample blank size (mm): 25


Heat treatment:


Heating temperature of the first quenching (℃): 850; Coolant: Oil


Heating temperature of the second quenching (℃):-


Tempering heating temperature (℃): 520; Coolant: water, oil


Tensile strength( σ b/MPa):≧980


Yield point( σ s/MPa):≧785


Elongation after fracture( δ 5/%):≧9


Reduction of area( ψ/%): ≧45


Impact absorption energy (aku2 / J): ≥ 47


Brinell hardness (hbs100 / 3000) (annealed or high temperature tempered): ≤ 207


Quenching process of ASTM 5140 steel pipe plant


ASTM 5140 quenching 850 ℃, oil cooling; Tempering 520 ℃, water cooling, oil cooling. The surface quenching hardness of 40Cr steel pipe is hrc52-60, and the flame quenching can reach hrc48-55.
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