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Alloy Seamless Steel Pipe

Alloy seamless steel pipe is a kind of seamless steel pipe, and its performance is much higher than that of ordinary seamless steel pipe. Alloy seamless steel pipe contains elements such as silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, copper, boron, rare earth, etc.

Description

Material：

12Cr1MoV, P22 (10CrMo910) T91, P91, P9, T9, WB36, Cr5Mo (P5, STFA25, T5,) 15CrMo (P11, P12, STFA22), 13CrMo44, Cr5Mo, 15CrMo, 25CrMo, 30CrMo, 40CrMo.

Alloy Steel Seamless Pipe
1	GB/T 6479	15CrMo	ASTM A335	P12c	alloy steel
2	GB/T 5310	15CrMoG	ASTM A335	P12c	alloy steel
3	GB/T 9948	15CrMo	ASTM A335	P12c	alloy steel
4	YB/T 4173	15CrMoG	ASTM A369	FP12c	alloy steel
5	GB/T 9948	12Cr1Mo	ASTM A335	P11	alloy steel
6	YB/T 4173	12Cr2MoG	ASTM A369	FP22c	alloy steel
7	GB/T 5310	12Cr2MoG	ASTM A335	P22c	alloy steel
8	GB/T 9948	12Cr2Mo	ASTM A335	P22c	alloy steel
9	GB/T 6479	12Cr2Mo	ASTM A335	P22c	alloy steel
10	GB/T 9948	12Cr5MoI	ASTM A335	P5	alloy steel
11	GB/T 9948	12Cr5MoNT	ASTM A335	P5c	alloy steel
12	GB/T 9948	12Cr9MoI	ASTM A335	P9	alloy steel
13	GB/T 9948	12Cr9MoNT	ASTM A335	P9c	alloy steel
14	GB/T 5310	10Cr9Mo1VNbN	ASTM A335	P91	alloy steel
15	YB/T 4173	10Cr9Mo1VNbN	ASTM A369	FP91	alloy steel

Dimensions：

‌Outer diameter‌: The outer diameter of the hot-rolled tube ranges from φ32 to 630 mm.

‌Wall thickness‌: The wall thickness ranges from 2.5 to 75 mm.

‌Length‌: The length ranges from 3000 to 12500 mm.

Description：

Material

12Cr1MoV、P22(10CrMo910)T91、P91、P9、T9、WB36 、Cr5Mo(P5、STFA25、T5、)15CrMo(P11、P12、STFA22)、13CrMo44、Cr5Mo、15CrMo、25CrMo、30CrMo、40CrMo。

Specifications and Dimensions

Alloy seamless steel pipe
Material	Specifications	Material	Specifications
12Cr1MovG	16-18*3	15CrMo	57-60-63.5*4-5-9
12Cr1MovG	28-32*3-5-6	15CrMo	89-114*6-8-10
12Cr1MovG	48*305-5-6-8	15CrMo	133*6-8-10-14
12Cr1MovG	51*3.5-5-6-8	15CrMo	159*8-10-12-16
12Cr1MovG	60*4-5-8-10	15CrMo	168*8-10-16-20
12Cr1MovG	63.5*4-5	15CrMo	219*14-16-20
12Cr1MovG	76*3.5-6-8-10	15CrMo	273*10-12-14-16-20
12Cr1MovG	89*4.5-6-8-10-12	15CrMo	325*10-12-14-25
12Cr1MovG	108*4.5-6-8-10-12	15CrMo	377*10-12-25
12Cr1MovG	114*6-8-10-12-14	15CrMo	377*24-45
12Cr1MovG	159*8-10-12-16	15CrMo	426*12-14-16-30
12Cr1MovG	194*8-10-16	10Crm910	33.4*9.1
12Cr1MovG	219*8-10-16-20-25	10Crm910	54*6.5
12Cr1MovG	245*10-12-20	10Crm910	57*5.6
12Cr1MovG	273*10-10-12	10Crm910	530*110
12Cr1MovG	325*10-12-14-25-30	T91	57-60*5.6
12Cr1MovG	377*10-16-30	T91	60*4-6-8
12Cr1MovG	426*10-16-25	T91	54-4-8-10
12Cr1MovG	480*48	T91	51*7
15CrMo	28*4-6	T91	42-5.5
15CrMo	38-42-45*3.5-5-6-8	12Cr2MoWVTiB	42*3.5-5
15CrMo	51*3.5-4-5-6-8	15Mn3	42*5-6

Usage Instructions

The production process of alloy seamless steel pipes includes three-roller cross-rolling, continuous rolling or extrusion, tube removal, sizing (or reducing), cooling, straightening, hydraulic pressure test (or flaw detection), etc. According to different uses, the standards of alloy seamless steel pipes are also different, such as GB/T8162-1999 for general structures and mechanical structures, GB/T8163-1999 for conveying fluids, GB3087-1999 for low and medium pressure boilers, etc.

Technical Parameter

The technical parameters of alloy steel seamless pipes mainly include chemical composition, mechanical properties and implementation standards. ‌

Chemical composition

The chemical composition of alloy steel seamless pipes usually includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni), molybdenum (Mo), tungsten (W) and other elements. For example, the chemical composition of H13 seamless steel pipes includes carbon C: 0.13 ~ 0.19, silicon Si: 0.17 ~ 0.37, manganese Mn: 0.30 ~ 0.60, sulfur S: ≤ 0.025, phosphorus P: ≤ 0.025, chromium Cr: 1.35 ~ 1.65, nickel Ni: 4.00 ~ 4.50, copper Cu: ≤ 0.025, tungsten W: 0.80 ~ 1.20‌1. The chemical composition of ASTMA335P92 seamless steel pipe includes carbon: 0.07~0.13, manganese: 0.30~0.60, phosphorus: ≤0.020, sulfur: ≤0.010, silicon: ≤0.50, chromium: 8.5~9.50, molybdenum: 0.30~0.60, vanadium: 0.15~0.25, nitrogen: 0.03~0.07, nickel ≤0.40, aluminum: ≤0.04, niobium: ≤0.04~0.09, tungsten: 1.5~2.0, boron: 0.001~0.006‌.

Mechanical properties

The mechanical properties of alloy steel seamless pipes include tensile strength, yield strength, elongation, impact energy, etc. For example, the mechanical properties of H13 seamless steel pipe are tensile strength σb (MPa) ≥ 1175 (120), yield strength σs (MPa) ≥ 835 (85), elongation δ5 (%) ≥ 10, and impact energy Akv (J) ≥ 78 ‌ 1. The mechanical properties of ASTMA335P92 seamless steel pipe are tensile strength ≥ 620MPa and yield strength ≥ 440MPa ‌.

Implementation standards

The implementation standards of alloy steel seamless steel pipes include international standards and national standards. Common standards include DIN17175, JISG3467, JISG3458, GB5310, GB9948, ASTMA335/A335M, ASTMA213/A213m, etc. For example, DIN17175 is the industrial standard of the Federal Republic of Germany, and GB/T8162-2008 and GB/T8163-2008 are Chinese national standards ‌.