JIS G3445 STKM11A STKM12C STKM13C outer round inner oval shapped steel tubes for auto rubber bushing

Seamless Carbon and Alloy Steel Mechanical Tubing

Applications: For auto rubber bushing

Size range: O.D.:6-76mm W.T.:1-15mm L:max12000mm

Steel Grade JIS G3445 STKM11A,12C,13C or others,Chemical compisition:

Mechanical properties:

1. Thickness variation can’t lead the wall out the limit deviations concerning wall thickness.

2. In pipe cross-section the deviation from right angle can’t be more than ±1.5°.

3. Pipe curvature can’t be more than 2 mm for 1m of length.

Pipes are produced without adjustment, in this case curvature is not regulated.

1)About our factory:

Zhejiang New Era Steel Tube Technology Co., Ltd is one of the best seamless steel tube products manufacturer and exporter in china. Our main products include cold drawn and cold rolled seamless steel tubes .We can manufacture non-standard and special application tubes, also according to the international standards as well. Ningbo Pipeway Trade Co.,Ltd is our branch company for all internation business service for our company.

Our Production equipments including 16 cold drawing lines and 22 cold rolled machines:

We have full testing equipments for different kinds of testing for steel tubes:

Our products can produced as DIN,ASTM,ASME,EN,JIS,BS,GB,GOST,ISO etc international standard 

Precision steel tubes:DIN2391 st52/A519 4130 4140 1026/EN10305-1 E355+N/EN10305-4 E235+N

Boiler steel tubes:ASTM A192/A179/A210 Gr.A/A213;DIN17175 st35.8/EN10216

Seamless Mechanical tubes: ASTM A519, EN10297-1/EN10210 S355J2H

Wire line Drill Rods:BQ,NQ,HQ,PQ XJY750,XJY850 4130+SR 1541

Oil and Gas line pipes:API 5L Grade B,A106 Gr.B,A53 Gr.B,API 5D

Stainless Steel tubes 304,304L,316,316L

Steel pipes and tube Size range:OD 4-300mm,Wt:0.5-30mm

We have 15 years experience of exporting steel tubes and steel pipes , main exporting to American, Europe, Asian, Australia, Africa .

We have cerficate of ISO9001,TS16949,TUV/PED for different market demand: