DIN2391 St52 Cold Rolled Seamless Steel Pipe Manufacturer Cold Drawn Factory Price Seamless Steel Tube for Hydraulic Cylinder

• After-sales Service: One Year
• Warranty: One Year
• Type: Seamless
• Technique: Cold Rolled, Cold Drawn, Honed
• Material: Alloy Steel
• Surface Treatment: Bare Pipe
• Model NO.: IR-B steel pipe
• Usage: Boiler Pipe, Hydraulic/Automobile Pipe, Machinery Industry, Special Purpose
• Section Shape: Round
• Size: 10mm~60mm
• Length: Fixed Length, by Random
• End Processing: Plain Ends
• Surface: Bare Pipe, Anti-Rust Painting
• Transport Package: Standard Seaworthy Packing
• Specification: Small diameter from 10mm to 60mm
• Trademark: Iron&steel
• Origin: China
• HS Code: 73045910
• Production Capacity: 2000tons Per Month

Product Description

ST52 Seamless Steel Pipe for Hydraulic Cylinder
GB3087 Chinese national standard
GB5310 Chinese national standard
ASME SA210 Boiler and pressure vessel code of ASME
ASME SA213 Boiler and pressure vessel code of ASME
DINl7175 Deutsches industrial standard~

Application:
Used as the pipes on the heated side of low and medium pressure boilers(normally with operating pressure not higher than 5.88Mpa and
operating temperature below 450 oc);as the pipes on the heated sides of high·pressure boilers,economizers,overheaters,reheaters and pipes
for petrochemical industry(with the operating pressure above 9.8Mpa and operating temperature ranging between 450~C~650~C1
Specifications of ma}or steel:

Processing form	I.D.mm	Length	Straightness	I.D.tolerance	I.D.Roughness(RA)
Cold-rolled	30-100	≤12M	0.3-1.0/1000	H8-H10	0.4-1.6um
Cold-drawn	30-250	≤12M		H8-H10	0.8-1.6um
Hone	40-500	≤12M		H8-H9	0.4-0.8um
SRB	50-250	≤9M		H8	0.1-0.4um

 Tolerance of ID and WT
 

Size of inside Diameter(mm)	ID Tolerance			Tolerance of wall thickness
30	+0.0330	+0.0520	+0.0840	<120mm(OD)              ±5% >120mm up to 210mm±7.5% >210mm                     ±10%
>30-50	+0.0390	+0.0620	+0.1000
>50-80	+0.0460	+0.0740	+0.1200
>80-120	+0.0540	+0.0870	+0.1400
>120-180	+0.0630	+0.1000	+0.1600
>180-250	+0.0720	+0.1150	+0.1850
>250-315	+0.0810	+0.1300	+0.2100
>315-400	+0.0890	+0.1400	+0.2300

Length and cut tolerance
 
Length ≤ 500mm , +2mm
> 500mm ≤ 2000mm, +3mm
> 2000mm ≤ 5000mm, +5mm
> 2000mm ≤ 7000mm, +10mm
 
Standard:DIN 2391,EN10305
Material: St45,St52,E355
 
Chemical composition
 

Steel grade	Chemical composition,%
	C	Si	Mn	P	S	Cr
				≤
St45	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.250
ST52(E355)	≤0.22	≤0.55	≤1.6	0.025	0.025	0.25
SAE1026	0.22-0.28	0.15-0.35	0.60-0.90	0.040	0.050	/
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.035	0.035	0.300
20#	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.250

  
9. Mechanical Properties
 

Delivery condition	BK Cold finished(hard)		BKS Cold drawn and stress-relieved
Steel grade	Rm Mpa	Elongation A5(%)	Rm MPa	ReH MPa	Elonggation A5(%)
ST45	≥550	≥5	≥520	≥375	≥15
ST52(E355)	≥640	≥5	≥600	≥520	≥14
SAE1026	≥640	≥5	≥600	≥510	≥15
16Mn	≥640	≥5	≥600	≥520	≥14
20#	≥550	≥8	≥520	≥375	≥15

 

11.Delivery condition:BKS, NBK
Appearance
 
Tube shall have a smooth internal and external surface consistent with cold working  process, tube inner surface should be free from rust, scratches and other surface
irregularities.