Product Details

Product Description

Product Name :Thin wall Big size precision seamless gas cylinder pipe

Working method	Range	ID size	Tolerance
			ID Torlance			WT	Ovality	Curvature
			H8	H9	H10	WT	Ovality	Curvature
cold drawn	25-250	>30-50	+0.039 0	+0.062 0	+0.100 0	±5% to 7.5% ID>210mm ±10%	≤0.10-0.20	0.3
cold rolling	25-150	>50-80	+0.046 0	+0.074 0	+0.120 0
cold-drawn-honed	40-250	>80-120	+0.054 0	+0.087 0	+0.10 0
cold drawn-SRB	50-250	>120-180	+0.063 0	+0.100 0	+0.160
cold drawn-polish	40-250	>180-250	+0.072 0	+0.115 0	+0.185 0
polish-SRB	50-250	other size and technique parameter upon request

The difference between precision steel pipe and seamless pipe:
1. the seamless steel tube with obvious difference is that dimensional accuracy, can be up to 0.1mm.

2. high precision steel pipe diameter surface finish, the customer without processing can be used directly and ordinary seamless steel tube to the customer and lather, polishing processing.

Features:

1. The smaller outer diameter

2. High precision to do small batch production

3. Cold drawn finished products of high precision, good surface quality

4.The steel pipe transverse area is more complex

5. Steel pipe is superior performance, dense metal

Delivery Condition

1. BK(+C)

the final heat treatment after cold forming, threfore small steel pipe plasticly, the plasticly degree does not guarantee

2. BKS(+SR)

have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing again

3. NBK(+N)

after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium

4. BKW(+LC)

after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)

5. GBK(+A)

after cold forming, annealing in non oxidizing medium protective gas

Company Information

Yantai Xinpeng Steel Pipe Co., Ltd,established in Dec 1992, with registered capital of 5 million Yuan, we have more than 20 years experience in manufacturing and exporting steel pipe. Our company is equipped with JLB250T hydraulic cold drawn machine set,LD120 precision cold rolled machine set,multple precision straightening machine,box heat treat furnaces(8000-10000mm).

Size Range of Us

MECHANICAL PROPERTIES (we do much better than this)

Condition	Material Grade	T.S (MPa) lowest	Y.S (MPa) lowest	Elongation (%)
BKS	ST35 (10#)	≥420	≥315	≥14
BKS	ST45(20#)	≥520	≥375	≥12
BKS	ST52(16Mn)	≥580	≥420	≥10
GBK	ST35 (10#)	≥315		≥35
GBK	ST45(20#)	≥390		≥32
GBK	ST52(16Mn)	≥490		≥30
NBK	ST35 (10#)	340-470	≥235	≥32
NBK	ST45(20#)	440-570	≥255	≥30
NBK	ST52(16Mn)	490-630	≥335	≥28