Product Details

Product Description

Application：

1. Solar Racking

2. Agricultural and dairy products;
3. Greenhouse structures and equipment
4. Playground and recreational equipment
5. Conveyor rollers
6. Carports and metal buildings
7. Trailers
8. Appliances
9. Canopies and Shade Structures
10. Satellite dish supports
11. Vinyl stiffening tubes
12. Miscellaneous product applications

Order Definition:

Details (essential data)
1. Product “ Mechanical Tube”.
2. Manufacturing norms.
3. Steel grade and heat treatment.
4. Nominal dimensions:
A. Outer Diameter
B. Wall Thickness
C. Length
5. Quantity and tolerances

Options

1. Request for steel with controlled sulphur content

2. Special tolerances
3. Lengths different to those shown as standard.
4. Special checks
5. Certification and marking different to that shown in the present specifications.
6. Colour coding of one end

Detailed Images

Standard:

JIS G3445 Carbon Steel Tubes for Machine Structural Purposes

Steel Grades:

JIS G3445: STKM 12A, STKM 13A, STKM 16A, STKM 17A, STKM 19A

Sizes Range:

OD10.2mm-720mm, WT: 1.6mm-100mm

Chemical Composition(%):

Grades	C	Si	Mn	P	S
STKM 12A	≤0.20	≤0.35	≤0.60	≤0.04	≤0.04
STKM 13A	≤0.20	≤0.35	≤0.90	≤0.05	≤0.05
STKM 19A	≤0.25	≤0.55	≤1.5	≤0.04	≤0.04
STKM 16A	≤0.35-0.45	≤0.40	≤0.40-1.00	≤0.04	≤0.04
STKM 17A	≤0.45-0.55	≤0.40	≤0.40-1.00	≤0.04	≤0.04

Mechanical Properties

Grades	Yield Strength R2 (Mpa)	Tensile Strength Rm (Mpa)	Elongation(%)(L)
STKM 13A	215 min	370 min	25 min
STKM 19A	315 min	490 min	18 min
STKM 16A	325min	510 min	15 min
STKM 17A	345min	550 min	15min

Outer Diameter Tolerances

+/-1%, or +/-0.5mm (Chose the bigger one)

Wall Thickness Tolerances

Scope of Outer Diameter	Ratio of Wall Thickness and Outer Diameter (WT/OD)	Tolerance
102mm max	/	+/12.5% or +/-0.4mm (Chose the bigger one)
102mm min	0.05 max	+/15% or +/-0.4mm (Chose the bigger one)
102mm min	0.05-0.10	+/12.5% or +/-0.4mm (Chose the bigger one)
102mm min	0.10 min	(-10%, +12.5%)