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STKM13A Cold rolled Seamless Precision Tube JIS3445 with thin thickness/heavy wall thickness

Basic Information
Place of Origin: China
Brand Name: SunShine
Certification: ISO9001
Model Number: 6mm to 114.3mm
Minimum Order Quantity: 5T
Packaging Details: In Bundles, Woodenbox As Your Requirement
Delivery Time: 30days
Payment Terms: L/C, T/T
Supply Ability: 2000T/Month
Detail Information
Keyword: Seamless Tube OD. Range: 6mm To 114.3mm
Wall Thickness: 0.8mm To 30mm Standard: JIS3445
Grade: STKM 11, STKM 11A, STKM 12, STKM 13, STKM 13A Length: Max Length 12M
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STKM13A Seamless Precision Tube


JIS3445 Seamless Precision Tube


JIS3445 Tube

Product Description

STKM13A JIS3445 Small Size Alloy Precision Seamless Steel Tube 75*3.5MM​

JIS G 3445 Grade STKM 13A Carbon Steel Seamless Tubes are also known as mild steel pipes and tubes. JIS G 3445 Grade STKM 13A Tubes are low-cost Low Carbon Steel Tubes with a max 025 % carbon content with a combination of 030-090 % manganese and easy to form and shape. These pipes are manufactured as per JIS Specifications and are commercially referred to as CS pipes or MS pipes. Low Carbon Steel Pipes are not as hard as high-carbon steel pipes, Though carburizing can increase their surface hardness.



STKM13A Seamless tubes Chemical composition:

Grade Designation Unit %
C Si Mn P S Nb or V
Grade 13 A STKM 13A 0.25 max. 0.35 max. 0.30~0.90 0.040 max. 0.040 max.





Mechanical Properties:

Standard Steel Grade Tensile Strength (MPa) Yield Point (MPa) Elongation(%)
JIS G3445 STKM 13A ≥375 ≥215 ≥30
STKM 13B ≥440 ≥305 ≥20


Pipe Tolerance Table
Name Rang(mm) German Standard(mm) Corporate Internal Control Standards(mm) Special High-Precision(mm)
Outer Diameter 4-30 ±0.08 ±0.05 ±0.03
  31-40 ±0.15 ±0.05 ±0.03
  41-50 ±0.20 ±0.08 ±0.03
  51-60 ±0.25 ±0.08 ±0.03
Wall thickness 0.5-7 ±10% ±10%,Min±0.05 ±10%,Min±0.03
Length +/-10mm Automotive industry pipe length can be cut according to customer requirements.



Heat treatment process delivery conditions:
Delivery Condition Heat Treatment Process
+C Cold drawn / hard. After the final cold forming no heat treatment.
+LC Cold drawn/soft. After the final heat treatment deformation, cold was drawn, allowing a degree of cold deformation
+SR Steel heat treatment is applied after the last cold deformation process, the result of state steel after due process, the residual stress deformation and machining makes a certain degree of difficulty increases.
+A In the final step of the steel pipe after cold deformation, is placed in a controlled atmosphere furnace for annealing.
+N In the final step of the steel pipe after cold deformation, is placed in a controlled atmosphere furnace at a temperature above the phase transition point to continue annealing.



STKM13A Cold rolled Seamless Precision Tube JIS3445 with thin thickness/heavy wall thickness 0



Q: What product information must I provide before making a purchase?
Please provide the grade, width, thickness, and surface treatment requirements, as well as the quantities you require.

Q: What shipping ports are there?
We normally ship from Shanghai,Tianjin, Qingdao, and Ningbo ports

Q: Is it possible to send samples?
Of course, we offer free samples and express shipping to customers all over the world.

Q: Do you offer a service for customized products?
Yes, we can produce according to your specifications and drawings.

Q: Can I pay you a visit at your factory?
Customers from all around the world are welcome to visit our factory.

Q: Can you assist me in importing steel products for the first time?
Yes, we have shipping agent who will arrange the shipment with you.

Q: Do you have any MOQ limit for production?
We don’t have any MOQ limit. But as for our steel pipe product, we usually use container transport for lower freight. In the case of express delivery, high freight charges will be generated.

Q: Is it OK to print my logo on the product or the carton packing?
Yes. Please inform us formally before our production and confirm the design firstly based on our sample.

Q: How to pack the product?
The inner layer has a waterproof paper outer layer, iron packaging, and is fixed with a fumigated wooden pallet. It
can effectively protect products from corrosion during ocean transportatio

STKM 13 Chemical Composition (WT%)

Contact Details

Whatsapp : +8613961408918