Supply alloy seamless steel tube in 16Mn,40Cr,15CrMo,12Cr1MoV,42CrMo grades. Hot‑rolled & cold‑drawn options. Approximate international equivalent grades, custom sizes and MTR test report available for boiler, petro‑chemical & machinery use.

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38*6 42*6 48*8 60*10 108*16 114*16 159*20 168*22 219*28 Custom Specs

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Product Overview：

Alloy seamless steel tube is manufactured by adding chromium, molybdenum, manganese and vanadium alloying elements into steel. Compared with carbon‑steel tube, it delivers better high‑temperature strength, pressure‑bearing capacity, wear resistance and creep‑resistance performance.

Material Grades List
16Mn(Q345B), ASTM A572 Gr.50, EN S355JR	Low‑alloy steel for general heavy‑duty machinery equipment.
40Cr, AISI 5140, EN 41Cr4 (1.7035)	Medium‑strength alloy steel, widely used for hydraulic components and machined spare parts.
15CrMo, ASTM A213 T12, EN 13CrMo4‑5 (1.7335)	Heat‑resistant alloy tube for power plant, boiler & high‑temperature pipeline service.
12Cr1MoV, EN 13CrMoV4‑2 (1.7733)	Excellent creep‑resistance, mainly for boiler superheater and high‑pressure high‑temperature piping.
30CrMo / 42CrMo, AISI 4130 / AISI 4140, EN 42CrMo4 (1.7225)	High‑strength quenched‑and‑tempered alloy steel, for heavy‑load mechanical parts.

Parameter range
Outer diameter	Φ6mm‑Φ630mm
Wall thickness	0.5mm‑80mm
Standard length	1‑12m， Customizable short and extended non ruler
Outer diameter accuracy	Maximum ± 0.03mm
Executive Standards	ASTM A335, EN 10216-2, DIN 17175, GB/T 5310
Non-standard customization	Special wall thickness, honing inner holes, and pressure deep processing can all be customized

Optional tolerance range
Tolerance control	Optional manufacturing process
Tolerance ≤ 0.05 mm	Cold rolling
Tolerance ≤ 0.10 mm	Cold rolling
Tolerance ≤ 0.30 mm	Cold drawing \| Cold rolling
Tolerance ≤ 0.50 mm	Cold drawing \| Hot rolling
Tolerance ≤ 1.00 mm	Hot rolling \| Hot expanding

Optional delivery status
Oil removal from oil pipes	Annealing and straightening	Steel pipe corrosion prevention
Steel pipe threading	Length cut-to-length	Steel pipe coating
Steel pipe cap	Exquisite bundling	Beveling

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Product Detail

Product Overview：

Material Grades List
16Mn(Q345B), ASTM A572 Gr.50, EN S355JR	Low‑alloy steel for general heavy‑duty machinery equipment.
40Cr, AISI 5140, EN 41Cr4 (1.7035)	Medium‑strength alloy steel, widely used for hydraulic components and machined spare parts.
15CrMo, ASTM A213 T12, EN 13CrMo4‑5 (1.7335)	Heat‑resistant alloy tube for power plant, boiler & high‑temperature pipeline service.
12Cr1MoV, EN 13CrMoV4‑2 (1.7733)	Excellent creep‑resistance, mainly for boiler superheater and high‑pressure high‑temperature piping.
30CrMo / 42CrMo, AISI 4130 / AISI 4140, EN 42CrMo4 (1.7225)	High‑strength quenched‑and‑tempered alloy steel, for heavy‑load mechanical parts.

Parameter range
Outer diameter	Φ6mm‑Φ630mm
Wall thickness	0.5mm‑80mm
Standard length	1‑12m， Customizable short and extended non ruler
Outer diameter accuracy	Maximum ± 0.03mm
Executive Standards	ASTM A335, EN 10216-2, DIN 17175, GB/T 5310
Non-standard customization	Special wall thickness, honing inner holes, and pressure deep processing can all be customized

Optional tolerance range
Tolerance control	Optional manufacturing process
Tolerance ≤ 0.05 mm	Cold rolling
Tolerance ≤ 0.10 mm	Cold rolling
Tolerance ≤ 0.30 mm	Cold drawing \| Cold rolling
Tolerance ≤ 0.50 mm	Cold drawing \| Hot rolling
Tolerance ≤ 1.00 mm	Hot rolling \| Hot expanding

Optional delivery status
Oil removal from oil pipes	Annealing and straightening	Steel pipe corrosion prevention
Steel pipe threading	Length cut-to-length	Steel pipe coating
Steel pipe cap	Exquisite bundling	Beveling