Cold Drawn Seamless Mild Steel Tube Carbon Steel Pipe Alloy Steel Pipe Seamless Black Steel Pipe

1.Commodity name:Seamless astm a106/a53grb sch40 cold drawn steel pipe

2.Standard:GB/T8713,GB/T3639,DIN2391,EN10305,ASTMA519,ASTMA106-2006

3.Grade: 10#(St37/St37.2/St35.8),20#(aisi1020,ck20,St42-2/St45-8/St45-4),

45#(aisi1045,ck45,ASTM A1045),st52(16Mn,Q345D),25Mn(stkm13c-t),27SiMn

4.OD:30-250mm;

5.ID tolerance:H8,H9,H10

6. Wall thickness:10%×ID

7.Surface roughness:Ra 0.02— 0.4μm

8. Delivery condition:BK,BKW,BKS,GBK,NBK

9.Package: steel strip bundles, black paint coating, beveled ends or plain

10.Payment Terms: L/C or T/T(30% deposit and 70% balance against B/L copy)

11.Price Item:EXW,FOB,CFR or CIF

12.Delivery Time: Usually 15 working days after order confirmed& getting T/T deposit or original L/C

Mechanical Performance

ID Tolerance:

Delivery condition:

1. NBK(+N)

after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium

2. GBK(+A)

after cold forming, annealing in non oxidizing medium protective gas

3. BK(+C)

the final heat treatment after cold forming, therefore small steel pipe plastically, the plastically degree does not guarantee

4. BKW(+LC)

after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)

5. BKS(+SR)

have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing again

Application:

1.Hydraulic Cylinder Tube---Used in the hydraulic cylinder of the heavy machinery, Cranes, excavator also forklifts. Material is various, mainly STKM-13CT, ST52, CK45 and 1020. We can work and get the mechanical property of the clients need and extended the life of the hydraulic cylinder.

2.SRB tube ----- Used in Elevator,buffer and Hydraulic Cylinder .This kind tube have a better roughness inner the tube, ra0.2-0.4um and can use directly in the hydraulic cylinder tube.

Range: ID 50-250mm and Length can work at most 6M.

3.Cold finished tube---- Widely Used. Processing range 30-300mm, biggest length is 11M.