Tubes For Mechanical And Automotive, Automotive Mechanical Tube, Tubes for automotive applications

Your tubular products representative will be happy to work with you to develop the information that is required. Sunny Steel supply a 1/2 million foot inventory of carbon steel pressure tubing including boiler tubes, condenser tubes and heat exchanger tubes all made in the China.

Our carbon steel pressure tubing inventory is manufactured in accordance with ASME SA-178 A and/or ASME SA-214 in diameters of 3/4″ through 4”.

Chemical Composition (%) of ASTM A519

ASTM A519 covers several grades of carbon and alloy steel seamless mechanical tubing. The standard is also acceptable in the manufacture of piping.

Grade Designation	C	Mn	P≤	S≤	Si	Cr	Mo
1008	≤0.10	0.30-0.50	0.04	0.05	-	-	-
1010	0.08-0.13	0.30-0.60	0.04	0.05	-	-	-
1018	0.15-0.20	0.60-0.90	0.04	0.05	-	-	-
1020	0.18-0.23	0.30-0.60	0.04	0.05	-	-	-
1025	0.22-0.28	0.30-0.60	0.04	0.05	-	-	-
1026	0.22-0.28	0.60-0.90	0.04	0.05	-	-	-
4130	0.28-0.33	0.40-0.60	0.04	0.05	0.15-0.35	0.80-1.10	0.15-0.25
4140	0.38-0.43	0.75-1.00	0.04	0.05	0.15-0.35	0.80-1.10	0.15-0.25

Mechanical properties of ASTM A519

Grade	Condition	MPa Tenslle Point	Yield Point	Elongation
1020	CW	≥414	≥483	≥5%
	SR	≥345	≥448	≥10%
	A	≥193	≥331	≥30%
	N	≥234	≥379	≥22%
1025	CW	≥448	≥517	≥5%
	SR	≥379	≥483	≥8%
	A	≥207	≥365	≥25%
	N	≥248	≥379	≥22%
4130	SR	≥586	≥724	≥10%
	A	≥379	≥517	≥30%
	N	≥414	≥621	≥20%
4140	SR	≥689	≥855	≥10%
	A	≥414	≥552	≥25%
	N	≥621	≥855	≥20%

Minimum Quantities

Hot-finished carbon and alloy—10,000 pounds, or 4,536 kilograms minimum.
Cold-drawn carbon and alloy—5,000 pounds minimum or 125 feet minimum, 2,268 kilograms minimum or 38.1 meters minimum, whichever is greater.
Quantity variation—standard ±10% of the ordered weight, or ±25 feet or 7.61 meters, whichever is greater.

Special Configurations

Tubular Products special seamless tubing configurations start with the highest quality steels.
Grade, chemical analysis and surface condition are carefully considered, and production processes are tailored to achieve the best tubing for the end use.
The configurations are formed from round tube by cold drawing.
The tube is drawn over a shaped mandrel or through a shaped die, or both. Improved tolerances, finishes and mechanical properties result.

Machining Allowances & Production Tolerances

Hollow bar is manufactured in the size ranges most frequently required by mechanical engineering manufacturing companies. However, in the case of hollow bar, the tolerance range for the outside diameter lies in the plus range, and for the inside diameter in the minus range. The wall thickness tolerance is determined by the degree of centre offset; this is due to the effect of the tolerance for the outside and inside diameter, the wall thickness and the centre offset. (See diagram below.)

In the case of mechanical tubing to ASTM A 511, the outside diameter and the wall dimensions generally lie in the centre of the tolerance range. Thus, when ordering product for machining it is important to take into account the differences in the tolerances between the hollow bar and the ASTM A 511 mechanical tubing specifications. In most cases the machining set up is based on centring the outside diameter.

Size Range

Tubular products seamless mechanical tubing is furnished in both cold-drawn and hot finished form in a wide range of sizes, from 1.375″ to 7.750″ OD and from 0.188″ to 1.625″ wall thickness.

ASTM standards for Mechanical tubing

Abbr.	Corresponding	Application
A511	ASTM A511 / A511M	Specification for Seamless Stainless Steel Mechanical Tubing
A512	ASTM A512 / ASME SA512	Specification for Cold-Drawn Buttweld Carbon Steel Mechanical Tubing
A513	ASTM A513 / A513M	Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing
A519	ASTM A519 / A519M	Specification for Seamless Carbon and Alloy Steel Mechanical Tubing
A554	ASTM A554	Specification for Welded Stainless Steel Mechanical Tubing

Mechanical Tubing Application

Tubing used for mechanical and light gauge structural applications. Mechanical tube is produced to meet specific end use requirements, specifications, tolerances and chemistries. This allows for more specific property uniformity throughout the tube compared to standard pipe or tube.

Our factory has been proudly certified with the IATF 16949 Automotive Quality Management System for many years. We specialize in producing steel tubes with exceptional characteristics:

1. Bending without Cracking: Our steel tubes can be bent without the risk of cracking, ensuring their structural integrity in various applications.

2. Excellent Ductility: These tubes exhibit excellent ductility, making them suitable for applications requiring flexibility and resistance to deformation.

We offer a range of specialized steel tubes, including:

- Safety Airbag Tubes: Designed for the automotive safety airbag systems, these tubes are engineered for reliability and performance.

- Stabilizer Bar Tubes (16MnCr5 Material): These tubes are ideal for stabilizer bars in the automotive industry, featuring 16MnCr5 material for strength and durability.

- Automotive Motor Shaft Tubes (34MnB5 Material): Tailored for use in automotive electric motor shafts, these tubes are crafted from 34MnB5 material known for its mechanical properties.

Our steel tubes have a smooth surface finish, meeting the quality requirements for subsequent processes such as electrophoresis, painting, powder coating, galvanizing, and chrome plating.

We take pride in delivering high-quality steel tubes that adhere to the stringent standards of the automotive industry, ensuring safety, durability, and performance in your applications. If you have specific requirements or inquiries, please feel free to contact us for more details.