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Alloy tube

Process: Cold rolling and hot rolling+quenching and tempering annealing
Surface: Smooth and rust free oxide skin
Ra：≤3.2‑6.3μm
Material: Common 16Mn, 40Cr, 12Cr1MoV
Specification: Outer diameter 10-426mm, wall thickness 1.5-70mm customizable

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OD*WT（mm）

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 Detail

Product Overview：

Alloy pipe is a type of seamless steel pipe, which is divided into structural seamless pipe and high-pressure heat-resistant alloy pipe. Mainly different from the production standards and industry of alloy tubes, annealing and tempering of alloy tubes are carried out to change their mechanical properties and achieve the required processing conditions. Its performance is more versatile and has higher utilization value than ordinary seamless steel pipes. The chemical composition of alloy pipes contains more Cr, and it has high temperature resistance, low temperature resistance, and corrosion resistance. Ordinary carbon seamless pipes do not contain alloy components or have very few alloy components, so alloy pipes are widely used in industries such as petroleum, aerospace, chemical, power, boilers, and military.

Product List
Product Name:	Precision alloy steel pipe \| Seamless steel pipe
Product Name:	Hastelloy Pipe \| Seamless Steel Pipe
Product Name:	Low alloy seamless steel pipe \| Alloy steel pipe
Product Name:	Q235 alloy pipe \| seamless steel pipe
Product Name:	Q345 alloy pipe \| seamless steel pipe
Product Name:	16Mn alloy pipe \| seamless steel pipe
Product Name:	40Cr alloy pipe \| seamless steel pipe
Product Name:	27SiMn alloy pipe \| seamless steel pipe
Product Name:	12Cr1MoV alloy pipe \| Seamless steel pipe
Product Name:	15CrMo alloy pipe \| seamless steel pipe

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

Common specifications for small and medium-sized hot-rolled/cold drawn alloy pipes
Outer diameter （mm）	25	32	38	42	45	48	51	57	60
Common wall thickness（mm）	2.5-4	2.5-6	3-8	3-10	3-10	3-12	3-12	3-14	3-16

Outer diameter （mm）	63.5	76	89	108	114	121	133	146	159
Common wall thickness（mm）	3-16	4-20	4-22	4-28	4-30	4-32	4-36	6-40	6-45

Common specifications for medium and large diameter hot expanded/hot-rolled alloy pipes
Outer diameter （mm）	168	194	219	245	273	299	325
Common wall thickness（mm）	6-50	6-55	6-60	8-65	8-70	8-75	8-80

Outer diameter （mm）	351	377	426	450	480	530	610
Common wall thickness（mm）	10-85	10-90	10-100	12-100	12-100	12-100	14-100

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

National standard tolerance (ordinary grade, commonly used GB5310-2023/GB/T8163)
Outer diameter tolerance (hot-rolled)
Outer diameter (mm)	≤159	＞159
Allowable deviation	± 1.0% D, minimum ± 0.5mm	±1.0%D

Wall thickness tolerance (hot rolling)
Wall thickness (mm)	＜3.5	3.5‑20	＞20，D＜219	＞20，D≥219
Allowable deviation	+15%S / -10%S	+15%S / -10%S	±10%S	+12.5%S / -10%S

Outer diameter tolerance of cold drawn alloy tube
Outer diameter (mm)	≤30	30‑50	＞50
Ordinary level deviation	±0.30mm	±0.40mm	±0.8%D

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：

Product List
Product Name:	Precision alloy steel pipe \| Seamless steel pipe
Product Name:	Hastelloy Pipe \| Seamless Steel Pipe
Product Name:	Low alloy seamless steel pipe \| Alloy steel pipe
Product Name:	Q235 alloy pipe \| seamless steel pipe
Product Name:	Q345 alloy pipe \| seamless steel pipe
Product Name:	16Mn alloy pipe \| seamless steel pipe
Product Name:	40Cr alloy pipe \| seamless steel pipe
Product Name:	27SiMn alloy pipe \| seamless steel pipe
Product Name:	12Cr1MoV alloy pipe \| Seamless steel pipe
Product Name:	15CrMo alloy pipe \| seamless steel pipe

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

Common specifications for small and medium-sized hot-rolled/cold drawn alloy pipes
Outer diameter （mm）	25	32	38	42	45	48	51	57	60
Common wall thickness（mm）	2.5-4	2.5-6	3-8	3-10	3-10	3-12	3-12	3-14	3-16

Outer diameter （mm）	63.5	76	89	108	114	121	133	146	159
Common wall thickness（mm）	3-16	4-20	4-22	4-28	4-30	4-32	4-36	6-40	6-45

Common specifications for medium and large diameter hot expanded/hot-rolled alloy pipes
Outer diameter （mm）	168	194	219	245	273	299	325
Common wall thickness（mm）	6-50	6-55	6-60	8-65	8-70	8-75	8-80

Outer diameter （mm）	351	377	426	450	480	530	610
Common wall thickness（mm）	10-85	10-90	10-100	12-100	12-100	12-100	14-100

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

National standard tolerance (ordinary grade, commonly used GB5310-2023/GB/T8163)
Outer diameter tolerance (hot-rolled)
Outer diameter (mm)	≤159	＞159
Allowable deviation	± 1.0% D, minimum ± 0.5mm	±1.0%D

Wall thickness tolerance (hot rolling)
Wall thickness (mm)	＜3.5	3.5‑20	＞20，D＜219	＞20，D≥219
Allowable deviation	+15%S / -10%S	+15%S / -10%S	±10%S	+12.5%S / -10%S

Outer diameter tolerance of cold drawn alloy tube
Outer diameter (mm)	≤30	30‑50	＞50
Ordinary level deviation	±0.30mm	±0.40mm	±0.8%D

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