Mechanical tubes

Mechanical steel tubes are used in machined or formed parts of industrial, automotive, farm machinery, aircraft, transportation, materials handling, and household equipment. It is produced to exact outside diameter and wall thickness dimensions.

Mechanical tubes are used for mechanical and light gauge structural applications.

Mechanical tubes are produced to meet specific end use requirements, specifications, tolerances and chemistries.

Tubing used for mechanical and light gauge structural applications. This allows for more specific property uniformity throughout the tube compared to standard pipe or tube. While Mechanical tube can be produced to standard specifications when requested, it is often produced to “typical” properties that focus mainly on the yield strength for a precise size and wall thickness. In some applications with severe forming, yield strength may not even be specified and the mechanical tube is produced to be “fit for use”. Mechanical tubing encompasses a wide range of both structural and non-structural applications.

At SunnySteel, we apply our metallurgical and production expertise to manufacture high-performance seamless mechanical tube products to meet your needs.

This includes carbon, alloy and even custom steel grades; annealed, normalized and tempered; stress relieved and stress free; and quench and tempered.

Seamless Steel Tubes for Mechanical and Automobile usage for Backbone of Automobile and rear axle tube, manufacturing and processing of precision equipments, instruments and apparatus.

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”.

Application:

• Backbone of Automobile and rear axle tube
• Manufacturing and processing of precision equipments, instruments and apparatus

Delivery Condition: GBK, BKS, BK, BKW, NBK

Inspection and Test:

Chemical Composition, Mechanical Properties, Visual and Dimension Test, NDT, Grain Size Test

Surface treatment:

Oil-dip, Varnish, Shot Blasting

Grade and Chemical Composition (%)

Grade	C	Mn	P≤	S≤	Si	Cr	Mo
1010	0.08-0.13	0.30-0.60	0.04	0.05	-	-	-
1020	0.18-0.23	0.30-0.60	0.04	0.05	-	-	-
1045	0.43-0.50	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

Typical Mechanical Properties

Grade	Condition	Tensile strength	Yield stength	Elongation
		Mpa(min)	Mpa(min)	%(min)
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

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.

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.

Seamless and welded tubes for mechanical and general engineering applications. Tubes for construction and structural purposes such as civil structures, foundations, etc.

Standard		Steel Grade
EN	10297	E355
	10210-1/2	S235JRH, S275JOH, S275J2H, S355JOH, S355J2H
	10219-1/2
DIN	1629/2448	St-52
ASTM	A500	Gr. A, Gr. B
	A501
	A618	Gr. I, Gr. II, Gr. III

Dimensional Tolerance

Supply Conditions	Steel Tubes Provided according to Outside Diameter and Wall Thickness			Steel Pipes Provided according to Outside Diameter, Inside Diameter and Wall Thickness		Steel Tubes with the Outside Diameter of 77 mm, Inside Diameter of 57 mm and the Wall Thickness of 10 mm
Allowable Deviation of Diameter and Wall Thickness	Size (mm)		Allowable Deviation (%)	Size	Allowable Deviation	Size	Allowable Deviation
	Outside Diameter		±1.0	Outside Diameter	±1.0%	Outside Diameter	+1.0 mm-0.55 mm
	Wall Thickness	≤ 7	+15-9
		﹥7-15	+12.5-10	Inside Diameter	±1.75%	Inside Diameter	+1.5 mm-0.5 mm
		﹥15	+12.5-7.5	Wall-Thickness-Difference	≤ 15% of Nominal Wall Thickness	Wall-Thickness-Difference	≤ 15% of Nominal 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

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Mechanical Tubing vs. Structural Tubing

In the world of tubing, things can get a bit confusing. With many different types of tubing for different applications, terms and meanings can be a bit ambiguous. With this in mind, we’ve set out to explain the difference between structural tubing and mechanical tubing.

Mechanical Tubing:

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. While Mechanical tube can be produced to standard specifications when requested, it is often produced to “typical” properties that focus mainly on the yield strength for a particular size and wall thickness. In some applications with severe forming, yield strength may not even be specified and the Mechanical tube is produced to be “fit for use”.

Structural Tubing:

tubing used for structural applications. Standard strength requirements of the tube help dictate applications for which certain tubing is most appropriate. Structural tube is often referred to as hollow structural sections or HSS.

AVAILABLE SHAPES

Mechanical tubing encompasses a wide range of both structural and non-structural applications.

APPLICATIONS

• Solar Racking
• Agricultural and dairy products
• Greenhouse structures and equipment
• Playground and recreational equipment
• Conveyor rollers
• Carports and metal buildings
• Trailers
• Appliances
• Canopies and Shade Structures
• Satellite dish supports
• Vinyl stiffening tubes
• Miscellaneous product applications
• Structural Tube

• Buildings
• Bridges
• Towers
• Cranes
• Sign supports and poles
• Off-shore production and drilling platforms
• Roll-over protective structures (ROPS)

SPECIFICATIONS

Mechanical Tube

At Wheatland Tube, our mechanical tubing is manufactured to typical Mechanical tube properties or in accordance with ASTM A500 and A513 Types 1 and 2 specifications.

Our Mechanical tubing is not limited to these specifications and can be produced to specific customer requirements when appropriate.

Additionally, our in-line galvanized products comply with A1057 and A787 coating specifications and provide a synergistic triple-coat process for enhanced product life.

Structural Tube

While specifications will vary based on design (and from manufacturer to manufacturer), some common specifications of structural tubing include ASTM A500 Grade B and C, A847, A1065, and the recently approved ASTM A1085.

In both cases of “Structural” or “Mechanical” tubing, these products are ordered to a specific outside dimension (OD) and “gauge” or wall thickness. This varies from “pipe” products which are ordered based on inside dimensions (ID) and often pipe “schedules” that determine the wall thickness. Pipe and conduit products should not be used in structural applications as their strength properties may not be produced to standard structural specifications or meet specified engineering requirements.