Product Details

DIN2391 Gas Spring High Precision Cold Drawn Steel Tube

Product name: DIN2391 Gas Spring High Precision Cold Drawn Steel Tube

Outer diameter: 30-250mm

Thickness: 2-30mm

ID tolerance: H8 H9 or as client's request

Package: standard package with plastic bags or wooden cartons or as client's request

Delivery time: within 20-30 days after receiving payment or as client's request

Trade term: FOB Yantai, Qingdao or as client's request

Payment term: T/T or L/C or as client's request

Application: hydraulic cylinder for heavy machine, excavator, textile machine, oil drilling and other field

Mechanical Property

Delivery Condition	Cold drawn+stress-relieved(BK+S)(SR)			Cold finished(hard)(BK)
Steel Grade	Tensile strength (Rm Mpa)	Yield strength (ReH Mpa)	Elongation A5%	Tensile strength (Rm Mpa)	Elogation A5%
20#	≥520	≥375	≥15	≥550	≥8
45#	≥600	≥520	≥10	≥640	≥5
16Mn(Q345B Q345D)	≥600	≥520	≥14	≥640	≥5
25Mn	≥600	≥510	≥15	≥640	≥5
27SiMn	≥760	≥610	≥10	≥800	≥5
St45	≥520	≥375	≥15	≥550	≥5
E355(St52)	≥600	≥520	≥14	≥640	≥5
SAE1026	≥600	≥510	≥15	≥640	≥5

Technique and Tolerance

Working Method	Range	Size of ID	Tolerance
			ID tolerance			WT(mm)	Ovality	Curvature
			H8	H9	H10	WT(mm)	Ovality	Curvature
Cold Drawn	25-250	>30-50	+0.0390	+0.0620	+0.1000	±5% to 7.5% ID>210mm ±10%	≤0.10-0.20	0.3
Cold rolling	25-150	>50-80	+0.0460	+0.0740	+0.1200
Cold drawn-hone	40-250	>80-120	+0.0540	+0.0870	+0.1400
Cold drawn-SRB	50-250	>120-180	+0.0630	+0.1000	+0.160
Cold drawn-polish	40-250	>180-250	+0.0720	+0.1150	+0.1850
Cold drawn-polish-SRB	50-250	Other size and technique parameter upon request

Usage

Our company mainly produces various specifications of cold finished precision steel tube, which are widely used in hydraulic cylinder of heavy machine, excavator, forklifts, and other filed.

1. Low and middle pressure fluid transportation pipeline
2. Casing Tube
3. Boiler Pipe
4. Petroleunm and natural gas industry
5. Chemistry industry
6. Electric industry