May 06, 2024

How to improve the quality of the reaming

Reaming is a commonly used method of finishing and semi-finishing holes. The machining aperture is between φ1 and φ100mm, the dimensional accuracy is generally up to H8~H7, and the hand hinge can reach H6. The surface roughness is Ra1. 6 to 0.2. The tool for reaming is still based on the standard multi-tooth reamer, see Figure 1. It is made up of three parts: the working part, the neck and the handle.


Steel hollow section:

Other names: Hollow steel section, square steel tube, rectangular steel pipe, rectangle Steel Hollow Section, galvanized steel square tube, galvanized rectangular steel pipe, square hollow steel tube
Section Shape: square and rectangular
Material: carbon steel, Q195-Q215,Q345,20#,alloy steel,ST37-2,ST52-3,S235,S355,A500,A106,A53 

Standard: DIN EN 10210, DIN EN 10219, ASTM A 500 ,GB/T 3094-2000,GB/T 6728-2002

Length: 2m-12m
Technology: Cold rolled, cold drawn, hot rolled, galvanized, annealed, ERW, EFW, DSAW.
Size of Steel hollow section:

Rectangular steel pipe: 10*20mm--800*1000mm

Square steel pipe:10*10mm-800*800mm, 

WT: 2--30mm SCH 20, SCH30,SCH40,STD,XS,SCH80,SCH160,XXS etc

Packing:  Painting, oil outside, steel strip then in Bundle or according to customer`s requirements.

Application: The Steel hollow section tubes are used for Tower cranes, pick and move cranes, crawler cranes, mobile cranes, road construction, folk lift, equipment manufacture, building, green house, handrail, furniture, structure building etc.

Payment terms:30% advance payment, the balance will be against the BL copy. Or LC irrevocable at sight.

Finish: Galvanization ,bared, oiled, black panting or as per the client's requirement, beveled edges

Square pipe Specification(mm) Rectangular pipe Specification(mm)
16×16×0.4~1.5 380×380×8.0~14.0 10×20×0.6~1.5 250×150×6~12.0
18×18×0.4~1.5 400×400×8.0~14.0 14×21×0.6~1.5 250×100×6~12.0
20×20×0.4~1.5 420×420×10.0~14.0 15×30×1.5~1.5 250×200×6~12.0
25×25×0.6~2.0 450×450×10.0~14.0 15×38×0.6~1.5 300×150×6~12.0
30×30×0.6~4.0 480×480×10.0~14.0 20×30×0.6~2.0 300×200×6~12.0
34×34×1.0~2.0 500×500×10.0~14.0 20×40×0.8~2.0 300×250×6~12.0
35×35×1.0~4.0 And the specifications based on the cold drawn process is as follows 20×50×1.0~2.0 400×250×8~12.0
38×38×1.0~4.0 550×550×10.0~40.0 22×35×0.9~2.0 400×300×8~12.0
40×40×1.0~4.5 600×600×10.0~40.0  25×40×0.9~3.75 450×200×8~12.0
44×44×1.0~4.5 700×700×10.0~40.0 25×65×1.0~2.0 450×250×8~12.0
45×45×1.0~5.0 800×800×10.0~50.0 30×40×1.0~3.75 400×300×8~12.0
50×50×1.0~5.0 900×900×10.0~50.0 30×45×1.0~3.75 400×350×8~12.0
60×60×1.5~5.0 1000×1000×10.0~50.0 30×50×1.0~4.0 500×200×10~12.0
70×70×2.0~6.0
30×60×1.0~4.5 500×250×10~12.0
75×75×2.0~6.0
40×50×1.0~4.5 500×300×10~12.0
80×80×2.0~6.0
40×60×1.0~5.0 500×350×10~12.0
85×85×2.0~6.0
40×80×1.5~5.0 500×400×10~12.0
95×95×2.0~8.0
40×100×2.0~5.0 500×450×10~12.0
100×100×2.0~8.0
50×60×2.0~5.0 And the specifications based on the cold drwan process is as follows
120×120×4.0~8.0
50×80×2.0~5.0 600×200×10~28.0
150×150×6.0~10.0
50×100×2.0~8.0 600×400×10~28.0
180×180×6.0~12.0
60×80×2.0~6.0 600×500×10~28.0
200×200×6.0~12.0
80×100×2.0~8.0 800×400×10~28.0
220×220×6.0~14.0
120×60×2.5~10.0 800×600×10~28.0
250×250×6.0~14.0
120×80×2.5~10.0 800×700×10~28.0
280×280×6.0~14.0
150×100×2.5~12.0 1000×400×10~28.0
300×300×8.0~14.0
180×150×2.5~12.0 1000×500×10~28.0
320×320×8.0~14.0
200×100×4~12.0 1000×600×10~28.0
350×350×8.0~14.0
200×150×4~12.0 1000×800×10~28.0

Steel Hollow Section

Square Steel Tube,Rectangular Steel Tube,Galvanized Steel Hollow Section,Shs Carbon Steel

Cangzhou Fixed Star Steel Co.,Ltd , http://www.fixedstarpipe.com