• Model NO.：EYHT
• 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

Standard

DIN2391, DIN2445, EN10305, GB/T 3639, GB 8713,DIN17175, EN 10297-1,etc.

Grade

ST35(E235), ST37, ST24(E255), ST52(E355), 10#, 20#, 35#, 45#,
CK45, 4140, 16Mn, 42CrMo, E355, Q345B, Q345D,
Stainless Steel 304/316, Duplex 2205,etc.

Tolerance

H7, H8, H9,etc.

Application

1.Hydraulic cylinder
2.Pneumatic cylinder
3.Precise machine pipes
4.Agriculture machine
5.Boiler construction
6.Machinery :Stamping machine / Punching machine /Blow molding machine
Plastic injection machine / Food machine ,Forklift
7.Automobiles:
Crane / Truck / Truck lifter / Shock absorber of car, motorcycle, bicycle
8.Furniture: gas spring
9.Sport equipments
10.Medical equipments
11.Door closer
12.Jack

Surface Treatment

Polished , cold drawn , cold rolled, honed, anneal, Srb , od polished  

Test

Tensile Test, Hydraulic Test, Eddy Current Test etc

Condirion of Delivery

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, threfore small steel pipe plasticly, the plasticly 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

Delivery ConditionCold Finished (Hard) (BK)Cold Drawn and Stress-Relieved (BK+S)Hardness HBParametersT.S. Rm N/mm2Elongation A5%T.S. Rm N/mm2Y.S. ReH N/mm2Elongation A5%20# (A106)≥550≥8≥520≥470≥1217545# (CK45)≥650≥5≥600≥520≥1220716Mn (ST52,E355)≥640≥5≥600≥520≥1519025Mn≥640≥5≥600≥510≥1519527SiMn≥840≥5≥800≥720≥10230

Steel Grade

Chemical Composition (%)

C

Si

Mn

P

S

Cr

≤

St45

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

ST52(E355)

≤0.22

≤0.55

≤1.6

0.025

0.025

0.25

SAE1026

0.22-0.28

0.15-0.35

0.60-0.90

0.040

0.050

/

27SiMn

0.24-0.32

1.10-1.40

1.10-1.40

0.035

0.035

0.300

20#

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250