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JIS 3445 STKM11A Q195 Welded Steel Tube Cold Drawn For Auto Exhaust System

Minimum Order Quantity : 1TON Price : USD 800-1000 per ton
Packaging Details : In bundles in wooden box Delivery Time : 35Days
Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram Supply Ability : 60000 Tons per year
Place of Origin: China Brand Name: TORICH
Certification: ISO 9001 ISO 14001 TS 16949 EN 10204.3.1 ABS DNV Model Number: JIS 3445

Detail Information

Product Name: JIS 3445 STKM11A Auto Exhaust System Welded Steel Pipe Material: Carbon Steel
Steel Grade: STKM11A Surface: Oiled
Usage: Auto Exhaust System Shape: Round
Type: Welded Length: 2-12m
WT: 2-5mm OD: 10-20mm
High Light:

welded steel pipe


welding steel tubing

Product Description

JIS 3445 STKM11A Q195 Cold Drawn steel tube Auto Exhaust System Welded Steel tube


application Automobile and motorcycle Shock Absorber Pipe
Hydraulic-cylinder Pipe
Mechanical steel pipes for auto and motor parts
Gas Spring pipe
motor casing pipe




material STKM11A 
Production process ordinary high-frequency welded pipe
Advantages small diameter and thick wall
Surface Quality The internal and external surfaces of the steel tube are not allowed to have cracks, scabs, folds, delaminations, laps, and burns. Allows for scribes, scratches, misalignment of welds, burns, oxide scales, and external burr removal traces that are not more than a negative wall thickness deviation
Inspection items

chemical composition

Tensile test

Ultrasonic examination

Eddy current flaw detection

Bending test

Flattening test



Permissible Tolerance of Outer Diameter and Wall Thickness (mm)

Type of steel Tube Dimension of steel tube Permissible tolerance
Average class High class


(extruded and expanded) tube

Outer diameter D All ±1%
Wall thickness All +15%/-12.5%
Cold-drawn (cold-rolled) tube Outer diameter D 6~10 ±0.2 ±0.15
>10~30 ±0.40 ±0.20
>30~50 ±0.45 ±0.30
>50 ±1% ±0.8%
Wall thickness <1 ±0.15 ±0.12
>1~3 +15%
>3 +12.5%
Note: For hot-expanded tubes with outer diameter>35mm,the permissible tolerance of wall thickness is±18%.



Longitudinal Mechanical Properties of Steel Tubes

NO. Steel Grade Tensile Strength(Mpa) Yield point(Mpa) Elongation after breaking(%)
s<16 s>16
Not less than
1 10 335~475 205 195 24
2 20 410~550 245 235 20
3 Q295 430~610 295 285 22
4 Q345 490~665 325 315 21


Permissible deviations of the product analysis from the specified limits

Element Limiting values for cast analysis Permissible deviatioon of the product analysis in % by mass
C ≤0.22 +0.02
Si ≤0.55 +0.05
Mn ≤1.60 +0.10
P ≤0.025 +0.005
S ≤0.015 +0.003
Al ≥0.025 -0.005


JIS 3445 STKM11A Q195 Welded Steel Tube Cold Drawn For Auto Exhaust System 0

JIS 3445 STKM11A Q195 Welded Steel Tube Cold Drawn For Auto Exhaust System 1

JIS 3445 STKM11A Q195 Welded Steel Tube Cold Drawn For Auto Exhaust System 2

What is your Guarantee?
1.SO9001:2008 and TS16949 certification, SGS, BV, TUV or other third party inspection is available.
2.High quality with competitive price.
3.Advanced technology, experienced engineer, ISO quality system for quality assurance and traceability.

Do you have agent or distributor in our country?
1.We are recruiting area agent and distributor all over the world, welcome to send us your mail or call us for detail discussion.

How is your production capability?
1.2000 tons monthly production capacity, 5000 tons monthly trading capability
2.Prompt and Timely shipment

How to get the sample?
1.You are requested to pay for sample charges and courier charges from China to your country; and the free sample is according the product like size, steel grade and quantity, please consult our sales for details
2.Sample charges will be refunded when order is placed.

What is your Payment Term?
1.T/T: 30% deposit in advance, the balance 70% paid before shipment
2.30% down payment, the balance 70% paid against L/C at sight
3.Upon negotiation

Who are your customers?
1.Stockists, Distributors,Wholesalors,Agents, Traders, End Users, etc

How long will you react on our requirement?
1.Your requirement would be treated within 24 hours on weekdays. Quotations would be sent upon technical details confirmed by customer!

Any more questions about your doubts, please feel free to send us your emails or call!

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