Shandong Chengshun Metal Materials Co., Ltd.

Precision Steel Pipe

Product:Seamless Precision Pipe,precision steel pipe, Seamless Precision Tube
Application:Used for Mechanical Structures,Hydraulic Equipment,Automative Parts
Size: OD: 6mm-114mm,WT: 0.5mm - 60mm,LENGTH: 5.8/6/11.8/12m
Pipe Standard: EN 10305,ASTM A106-2006,BS 1139, DIN 2391,DIN 2445
Heat Treatment:NBK(+N),GBK(+A) ,BK(+C),BKW(+LC),BKS(+SR)

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Product Details

Description

Precision steel tube is a high-precision steel tube material processed by cold drawing or hot rolling. Because the inner and outer walls of precision steel pipes have no oxide layer, high pressure without leakage, high precision, high smoothness, cold bending without deformation, flaring, flattening without cracks, etc., they are mainly used to produce pneumatic or hydraulic components, such as cylinders or The oil cylinder can be a seamless tube or a welded tube.

Application

The internal and external diameter could control within +/- 0.01 mm. In the guarantee of anti-bending strength and torque strength same, the weight of precision pipe is lighter. It can be widely used in manufacturing precision machinery parts and engineering structure。

Size		Size Range	Tolerance
	OD	6-325mm	-0.035 -- +0.045mm
	ID	2-250mm	±0.035mm
	WT	1-32mm	depends on sizes
	Length	random or fixed length	+0-3.5mm
	Straightness	0.15:1000, 0.4:1000, 0.5:1000 1:1000 or customized
	Surface Roughness	Ra 0.02—0.4μm

Precision steel pipe size tolerances

For hot rolling precision steel pipe, tolerance of OD is +/- 0.1%.

For cold drawn precision pipe, tolerance allowed in below conditions:

Diameters 6mm to 10mm, normal tolerance condition +/- 0.2%, premium tolerance condition +/- 0.15%.

10mm to 30mm, normal tolerance condition +/- 0.4%, premium tolerance condition +/- 0.2%.

30mm to 50mm, normal tolerance condition +/- 0.45%, premium tolerance condition +/-0.3%.

For outer diameters above 50mm, normal tolerance condition +/- 0.1%, premium tolerance condition +/- 0.8%.

Specification&Standard

PRECISION CHREME-MOLYBDENUM STEEL TUBE

Standard	GB	ASTM	JIS	DIN
GRADE	15Cr	5115	SCR415	15Cr3
	20Cr	5120	SCR420H	20Cr4
	30Cr	5130	SCR430	28Cr4
	35Cr	5132	SCR430H	34Cr4
	40Cr	5140	SCR440	41Cr4
	12CrMo	A-387CR	A-387CR	13CrMo44
	15CrMo	41.494.18	4125	16CrMo44
	20CrMo	4125	4130	20CrMo44
	25CrMo	4130	SCR420H	25CrMo4
	30CrMo	SCR420H	4140	34CrMo4
	35CrMo	4140	4140	42CrMo4
	42CrMo	A-387CR

PRECISION ALLOY SEAMLESS STEEL TUBE

ASTM	A335-P1,A335-P2,A335-P12,A335-P11,A335-P22,A335-P9,A335-P5,A369-FP22,A213-T22,A213T11,A213-T12,A213-T2,A213-T1
GB	16mo，CR2MO,CR5MO,12crmo，15crmo，12cr1mov，
JIS	STPA12,STBA20,STPA22,STPA23,STPA24,STBA26,
DIN	15mo3，13crmo44，16CRMO44,10CRMO910,12CRMO195,

Grade	Chemical Composition%
Grade	C	Si	Mn	P	S
20#	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035
45#	0.42-0.50	0.17-0.37	0.50-0.80	0.035	0.035
SKTM13C-T(25Mn)	0.22-0.29	0.17-0.37	0.70-1.00	0.035	0.035
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.035	0.035
E355	≤0.22	≤0.55	≤1.6	0.025	0.025
Q345B	≤0.2	≤0.5	1.00-1.60	0.030	0.030
Q345D	≤0.2	≤0.5	1.00-1.60	0.030	0.030
SAE1026	0.22-0.28	0.15-0.35	0.60-0.90	0.040	0.050

Delivery condition	BKS Cold Drawn & Stress-Relieved
Steel Grade	Rm MPa	ReH MPa	Elongation A5(%)
ST45	≥520	≥375	≥15
ST52(E355)	≥600	≥520	≥14
SAE1026	≥600	≥510	≥15
45#	≥600	≥520	≥10
20#	≥520	≥375	≥15

Delivery condition	BK Cold finished
Steel Grade	Rm MPa	Elongation A5(%)
ST45	≥550	≥5
ST52(E355)	≥640	≥5
SAE1026	≥640	≥5
45#	≥640	≥5
20#	≥550	≥8

Process

Precision steel pipe manufacturing flow chart:

Raw Material Inspection – Remove Oxide Layer – Visual Inspection – Heating – Hot Rolling – Pickling and Passivation (Phosphating) – Grinding – Lubrication and Drying – Cold Rolling (Internal and external extraction) – Remove Oil – Ends Cutting – Inspection – Marking – Packing and Storage

As we know, most of precision steel pipe has cold drawn and hot rolled process. On the contrast, cold rolling will be more complicated. Not only the pipe need to be continuous rolled by three roller, but also the test have to be done after extrusion, so to guarantee the quality of the precision pipe materials.

Manufacturing methods of seamless precision pipe includes hot rolling and cold drawn. More over it could be manufactured in welding processes.

Precision steel pipe manufacturing flow chart:

Manufacturing methods of seamless precision pipe includes hot rolling and cold drawn. More over it could be manufactured in welding processes.

Packing

20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 24-26CBM

40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 54CBM

40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) 68CBM

In bundle,plastic bags,thin film,wooden pallet,standard seaworthy export packing or as customer demands

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Our main manufactures are stainless steel, galvanized steel, carbon steel and etc. That apply to engineering, coal mine, textile, electric power, boiler, machinery, We stick to the principle of "quality first, service first, continuous improvement and innovation to meet the customers" for the management and "zero defect, zero complaints" as the quality objective. We′re pleased to get your Inquiry and we will come back to as soon as possible.

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