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Drawn Over Mandrel Alloy Steel Pipe Jisg3445 Stkm Round Shape With Od 3 - 420mm

Minimum Order Quantity : 5 Ton Price : negotiable
Packaging Details : packing in wooden boxes or in hexagonal bundles Delivery Time : 30-35 days
Payment Terms : T/T, D/A, D/P, L/C, Western Union, MoneyGram Supply Ability : 60000 Ton per year
Place of Origin: ZheJiang,CHINA Brand Name: TORICH
Certification: ISO14001:2008,TS16949 Model Number: JISG3445 STKM11A 12A 12B 12C 13A 13B 13C 15A

Detail Information

Product Name: JISG3445 STKM11A 12A 12B 12C 13A 13B 13C 15A Drawn Over Mandrel Steel Tube Type: GB/T3077 , 38CrMoAl , ISO41CrAlMo74
Surface: Oiled Material: JISG3445 STKM
Usage: For Machine Structural Purposes Shape: Round Shape
OD: 3-420mm WT: 0.5-50mm
High Light:

alloy steel tube


alloy steel seamless tube

Product Description

JISG3445 STKM11A 12A 12B 12C 13A 13B 13C 15A Drawn Over Mandrel Steel Tube​:

JIS G3445 STKM 15A Drawn Over Mandrel Steel Tube Seamless And Electric Resistance,

which is produced by mandrel and die on the ERW mother tube, with cold drawing and cold rolling processing to achieve final target dimension, with good OD and ID smoothness


Product Name: Carbon steel tubes for machine structural purposes

Japanese Product Name :つぎめがないこうかん


Drawn Over Mandrel Steel Tube Material : STKM 15A or according to customers Specifications

DOM Tubing Application :

Machine Structural Purposes

Machine Auto competent



Mechanical parts

Mechanical Elements

Machine elements


1.Drawn Over Mandrel Steel Tube Grade

a. STKM 11A

b. STKM 12 (ABC)

c. STKM 13(ABC)

d. STKM 14(ABC)

e. STKM 15(AC) etc

f. Standard JIS G3445


2. OD:4-60mm, Wall thickness:0.5-7mm

3.Characteristic:The tubes are high precision in tolerance

4.Kindly advise heat treatment requirement if any.

5.STKM 15A Chemical composition % max:








DOM Steel Tube Delivery Condition:


HR:hot rolled

CW:cold worked

SR:stress relieved



HF: hot formed.



Drawn Over Mandrel Steel Tube Mechanical properties:

Tensile strength min470Mpa

Yield Strength min275 Mpa

Elongation min 22%



Tolerances on OD
Division Tolerance on OD


under 50mm ±0.5mm
50mm or over ±1%




under 50mm ±0.25mm
50mm or over ±0.5%




under 25mm ±0.12mm
25mm or over to and excel.40mm ±0.15mm
40mm or over to and excel.50mm ±0.18mm
50mm or over to and excel.60mm ±0.20mm
60mm or over to and excel.70mm ±0.23mm
70mm or over to and excel.80mm ±0.25mm
80mm or over to and excel.90mm ±0.30mm
90mm or over to and excel.100mm ±0.40mm
100mm or over ±0.50%




Note:1. For hot finished seamless steel tube, the outside diameter tolerance No.1 shall be applied.


2.The tolerance on outside diameter of quenched and tempered tubes shall be as agreed upon by the purchaser and manufacturer.



Tolerances on WT
Division Tolerance on WT


under 4mm +0.6mm -0.5mm
4mm or over +15%-12.5%




under 3mm ±0.3mm
3mm or over ±10%




under 2mm ±0.15mm
2mm or over ±8%




DOM Steel Tube Packaged and Delievery:

Standard seaworthy packaging , In bundles or carton boxes or wooden boxes or as per customes requirments.


DOM Tubing Factory production:

DOM Tubing Manufacturing DOM Steel Tube Production


Cold Drawing DOM tubing Drawing DOM Steel Tube

DOM Steel Tube in Cold Drawing Process:

Three Line Cold Drawing Machine Three-strand cold drawing mill

DOM Pipe in production Cold Drawing DOM Tube

Pickling and Heating Process:


steel tube production steel tube



Looking for ideal DOM Structural Steel Tube Manufacturer & supplier ? We has a wide selection at great prices to help you get creative. All the Drawn Over Mandrel Steel Tube are quality guaranteed. We are China Origin Factory of Electric Resistance Round Steel Tube. If you have any question, please feel free to contact us.



1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.


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