DIN2391 St35 H7 Tolerance 10 Inch Carbon Steel Seamless Honed Tube

• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Honed/Smooth
• Usage: Hydraulic/Automobile Pipe
• Section Shape: Round
• Thickness: 0.1 - 200 mm
• Length: 2-12m
• Delivery Condition: Bk, Bk+S, Gbk, Nbk
• Roughness: 0.2-0.4 U
• Straightness: ≤ 0.5/1000
• Transport Package: Export Standard Packing
• Specification: 5 - 500 mm
• Trademark: Kingmetal
• Origin: China (Mainland)
• HS Code: 7304399000
• Production Capacity: 5000 Ton/ Month

Product Description

Product Standard:

Our honed hydraulic cylinder tube is usually produced according to norms as ASTM A513, DIN 2391, DIN 1630, DIN 1629, EN 10216-2,
A 519,etc on customer's request. 

Size Range:

• Inside diameter from 40 to 1000mm, Max length 8 meters.
• Straightness: 0.5 /1000
• Tolerance EXT: DIN 2391
• Tolerance INT: ISO H8
• Roughness(Ra): 0.2 to 0.4µ 

Steel Grades We Supply

Carbon steel Honed tubes are available with grades as below:

• SAE 1020
• SAE 1026
• SAE1030/1035
• E355, E255, E215, E235
• ST52.3,  St35, ST 52.4, St 37.4

Stainless steel Honed tube can be supplied in grades as below:

• TP 304 / 304L
• TP316 / 316L
• TP 316Ti

Other steel grades of hone tube / honed pipe is available on customer's request.

Type:

• cold drawing
• normalizing treatment
• honing.

Tolerance standard:

Different sizes of ready to use honed tube are available.

ID(mm)	TOLERANCE(mm)
	H7	H8	H9	H10

<=30	+0.021/0	+0.033/0	+0.052/0	+0.084/0
30 - <=50	+0.025/0	+0.039/0	+0.062/0	+0.100/0
50 - <=80	+0.030/0	+0.046/0	+0.074/0	+0.120/0
80 - <=120	+0.035/0	+0.054/0	+0.087/0	+0.140/0
120 - <=180	+0.040/0	+0.063/0	+0.100/0	+0.160/0
180 - <=250	+0.046/0	+0.072/0	+0.115/0	+0.185/0
250 - <=315	+0.052/0	+0.081/0	+0.130/0	+0.210/0
315 - <=700	+0.057/0	+0.089/0	+0.140/0	+0.230/0

This will provide long piston seal life and prevent failure of the cylinder. The tube material is selected on the basis of application & working pressure.

The seamless tube for hydraulic cylinders, obtained from high quality cold drawn tubes, available in a wide dimensional rang

Chemical Composition

Standard	Steel Grade	C(%)	Si(%)	Mn(%)	S(%)	P(%)
DIN 2391	St35	≤0.17	≤0.35	≥0.40	≤0.025	≤0.025
	St37	≤0.17	≤0.35	≥0.40	≤0.025	≤0.025
	St37.4	≤0.17	≤0.35	≥0.40	≤0.025	≤0.025
	St45	≤0.21	≤0.35	≥0.40	≤0.025	≤0.025
	St44	≤0.21	≤0.35	≥0.40	≤0.025	≤0.025
	St52	≤0.22	≤0.35	≥1.60	≤0.025	≤0.025

 

Mechanical Property: 

Standard	Steel Grade	Mechanical Performance
		GBK(+A)		NBK(+N)
		Tensile Strength (Rm mpa)	Elongation rate (A5 %)	Tensile Strength (Rm mpa)	Yield Strength  (Reh mpa)	Elongation rate (A5 %)
DIN 2391	St35	≥315	≥25	346-478	≥235	≥25
	St37	≥315	≥25	346-478	≥235	≥25
	St37.4	≥315	≥25	346-478	≥235	≥25
	St45	≥390	≥21	440-570	≥255	≥21
	St44	≥390	≥21	440-570	≥255	≥21
	St52	≥490	≥22	490-630	≥355	≥22

GUANGZHOU KINGMETAL STEEL INDUSTRY CO., LTD. is an Industry Group Company. It is a professional company in designing, producing and selling steel pipe, pipe fittings, flanges, valves and prefabricated house. We have our own big factories with modern machine line to make high quality products, which is mainly to be exported to oversea markets.

We are pure-hearted and awaiting for your kind attention to our company