Product Details

Specifications

High Quality Seamless Precision steel tube with good wear resistance
1. ID 30-250mm
2. Max length 6m
3.MOQ:10MT
4. Best repu

High Quality Seamless Precision steel tube with good wear resistance

iso h8 honed seamless tube 1.OD:12-219mm WT:2.5-45mm.Length:4-8m 2.Standard:DIN 2391 3.Material:St37 20# St52

iso h8 honed seamless tube

Grade	20# 45# 16Mn 27SiMn 25Mn st52 st35
Metric size	Outer diameter:12-219mm
	Inside diameter from 4.8 to 87mm
	length 4-8 m.
	thickness:2.5-45mm
Straightness	0.2-0.3
Tolerance EXT	DIN 2391 GB/T8713
Tolerance INT	ISO4394 H8-H9
Roughness(Ra)	0.2 to 0.8µ
Type	cold drawing, normalizing treatment, honing,cold rolling,boring
Condition	BK, BKW, BKS, NBK, GBK
Quality	Prime quality of raw material from famous steel mill High precision on the tolerance of tube size
Application	The tubes are specialized in hydraulic cylinder, and other cylinders. automobile parts, motorcycle part, shock absorber

1. MATERIAL SPECIFICATION AND REF. DOCUMENT

ST52,BK+S,DIN2391 OR Equivalent

2. CHEMICAL COMPOSITION (%)

C (Max) Mn(Max) Si(Max) S(Max) P(Max)

0.22 1.6 0.5 0.035 0.035

3. MECHANICAL PROPERTIES

Elongation(Min) Y.S (Min.) UTS (Min.)

≥15 470 N/MM2 580 N/MM2

4. SUPPLY CONDITION

Cold drawn seamless steel tube, stress relieved and honed or skived roller burnished

5. SURFACE ROUGHNESS

Ra = 0.4~0.8Micron

6. TOLERANCES ON INNER DIA

ISO H8 H9

7.TOLERANCES ON WALL THICKNESS

≤ Dia120 +/-10 % of wall thickness

≥ Dia120 +/-10 % of wall thickness

8. STRAIGHTNESS

≤1 mm/M

9. OD TOLERANCE

≤ Dia 40 +/-0.2 mm

≥ Dia 40 ≤ Dia 100 +/-0.3mm

≥ Dia 100 +/-0.5mm

10. LENGTH AND CUT TOLERANCE

Length ≤ 500mm , +2mm

> 500mm ≤ 2000mm, +3mm

> 2000mm ≤ 5000mm, +5mm

> 2000mm ≤ 7000mm, +10mm

11. TUBE ENDS

Tube ends shall be cut nominally square to the axis and free from burs

12. APPEARANCE

Tube shall have a smooth internal and external surface consistent with cold working

progess, tube inner surface should be free from rust, scratches and other surface

irregularities.

13. CERTIFICATION

Material certificates will be send to u if want.

14. PACKING

Anti rust oil to be applied on material and both ends closed by plastic cap and

bundled by steel strips,braiding parcel.

15. SCOPE

Hydraulic cylinder tube for swivel crane, injection machine and construction

machine application

GB	JIS			ASTM		DIN
Q235	GGP STPY41	G3452 G3457	A53F A283-D		ST33		1.0033	DIN1626
10	STPG38	G3454	A135-A A53-A		ST37		1.0110	DIN1626
	STPG38	G3456	A106-A		ST37-2		1.0112	DIN17175
	STS38	G3455			ST35.8 ST35.4		1.0305 1.0309	DIN1629/4
	STB30	G3461	A179-C A214-C		ST35.8		1.0305	DIN17175
	STB33	G3461	A192 A226		ST35.8		1.0305	DIN17175
	STB35	G3461			ST35.8		1.0305	DIN17175
20	STPG42	G3454	A315-B A53B		ST42 ST42-2		1.0130 1.0132	DIN1626
	STPT42	G3456	A106-B		ST45-8		1.0405	DIN17175
	STB42	G3461	A106-B		ST45-8		1.0405	DIN17175
	STS42	G3455	A178-C A210-A-1		ST45-4		1.0309	DIN1629/4
16Mn	STS49 STPT49	G3455 G3456	A210-C		ST52.4 ST52		1.0832 1.0831	DIN1629/4 DIN1629/3
15MnV	STBL39	G3464
16Mn	STPL39	G3460	A333-1.6		TTST35N		1.0356	SEW680
15MnV	STBL39	G3464	A334-1.6
09Mn2V			A333-7.9 A334-7.9		TTST35N		1.0356	SEW680
(06A1NbCuN)	STPL46 STBL	G3460 G3464	A333-3.4 A334-3.4		10Ni14		1.5637	SEW680
(20Mn23A1)			A333-8 A334-8		X8Ni9		1.5662	SEW680

16Mo	STPA12 STBA12.13	G3458 G3462	A335-P1 A369-FP1 A250-T1 A209-T1		15Mo3		1.5414	DIN17175
12CrMo	STBA20	G3462	A335-P2 A369-FP2 A213-T2
15CrMo	STPA22 STBA22	G3458 G3462	A335-P12 A369-FP12 A213-T12		13CrMo44		1.7335	DIN17175
12Cr1MoV	STPA23 STBA23	G3458 G3462	A335-P11 A369-FP12 A199-T11 A213-T11