Project Description

Commitment to You

We are committed to integrate steel resources in china and serve the global steel market. We have 15+ years of experience in steel researching, production, managing and sales.

Our ability to purchase materials directly from leading mills will give you the competitive edge. Any Questions Just Call +86-731-89903933

DOM Tubes

DOM Tubing (Drawn over Mandrel) is a cold drawn 1020 to 1026 or ST52.3 grade electric resistance welded tube with all the flash removed prior to drawing to size. Cold drawing DOM to size allows for higher yield and tensile strengths. In comparison to other tubing, DOM is produced to more exact OD and ID tolerances. This allows for minimal machine time and has the highest weld strength possible.

DOM tubing is made from 1020 / 1026 or ST52.3 Steel

  • Meets ASTM A513 Type 5
  • Stocked Size Range: 3/16” – 14” OD; .028” – .625” wall thickness
  • DOM tubing is stocked in 17′-24’ random lengths
  • Cut to length service available
  • Suitable to hone sizes
  • Custom sizes available upon request
  • All the common off road sizes available

Benefits of DOM Tubing (Drawn over Mandrel):

  • Uniform wall thickness with close OD and ID tolerances
  • Uniform grain structure and controlled hardness
  • High Yield and Tensile Strength
  • Smooth and Clean OD and ID surfaces
  • OD and ID concentric
  • Excellent machining characteristics

APPLICATIONS

  • Hydraulic Cylinders
  • Auto and Truck Axles
  • Suspension parts and shock absorbers
  • High Speed Shafts and rollers
  • Bearings and Spacers
  • Roll cages
  • Agricultural components and many other machined tubular parts.

 

Quality Standards:

  1. EN10305 Steel Tubes for Precision Applications Seamless Cold Drawn Tubes
  2. DIN 2393 Welded Precision Steel Tubes
  3. ASTM A513 Standard Specification for Electric Resistance Welded Carbon and Alloy Steel Mechanical Tubing

Composition & Strength

Grade Chemistry % Yield Tensile Elongation Typical Hardness
PSI PSI % in 2″ section Min
1020 Carbon 0.150 – 0.200 60000 70000 10 B-75
MN 0.300 – 0.600
P 0.035 Max
S 0.035 Max
1026 Carbon 0.220 – 0.280 70000 80000 10 B-80
MN 0.600 – 0.900
P 0.035 Max
S 0.035 Max
ST52.3 Carbon 0.140 – 0.180 75000 85000 15 B-80
Si 0.150 – 0.300
MN 1.200 – 1.400
P 0.020 max
S 0.010 max

ASTM A513 Type 5 Diameter Tolerances

OD Inches Wall: OD Inches ID Inches
Size Range Percent of OD Plus Minus Plus Minus
Up to 0.499 All 0.004 0
0.500-1.699 All 0.005 0 0 0.005
1.700-2.099 All 0.006 0 0 0.006
2.100-2.499 All 0.007 0 0 0.007
2.500-2.899 All 0.008 0 0 0.008
2.900-3.299 All 0.009 0 0 0.009
3.300-3.699 All 0.01 0 0 0.01
3.700-4.099 All 0.011 0 0 0.011
4.100-4.499 All 0.012 0 0 0.012
4.500-4.899 All 0.013 0 0 0.013
4.900-5.299 All 0.014 0 0 0.014
5.300-5.549 All 0.015 0 0 0.015
5.550-5.999 Under 6 0.01 0.01 0.01 0.01
6 and Over 0.009 0.009 0.009 0.009
6.000-6.499 Under 6 0.013 0.013 0.013 0.013
6 and Over 0.01 0.01 0.01 0.01
6.500-6.999 Under 6 0.015 0.015 0.015 0.015
6 and Over 0.012 0.012 0.012 0.012
7.000-7.499 Under 6 0.018 0.018 0.018 0.018
6 and Over 0.013 0.013 0.013 0.013
7.500-7.999 Under 6 0.02 0.02 0.02 0.02
6 and Over 0.015 0.015 0.015 0.015
8.000-8.499 Under 6 0.023 0.023 0.023 0.023
6 and Over 0.016 0.016 0.016 0.016
8.500-8.999 Under 6 0.025 0.025 0.025 0.025
6 and Over 0.017 0.017 0.017 0.017
9.000-9.499 Under 6 0.028 0.028 0.028 0.028
6 and Over 0.019 0.019 0.019 0.019
9.500-9.999 Under 6 0.03 0.03 0.03 0.03
6 and Over 0.02 0.02 0.02 0.02
10.000-10.999 All 0.034 0.034 0.034 0.034
11.000-11.999 All 0.035 0.035 0.035 0.035
12.000-12.999 All 0.036 0.036 0.036 0.036
13.000-13.999 All 0.037 0.037 0.037 0.037
14.000-15.000 All 0.038 0.038 0.038 0.038

Wall Tolerances ASTM A513 Type 5

Wall Thickness Including .375″ to .875″ OD Over .875″ to 1.875″ OD Over 1.875″ to 3.750″ OD Over 3.750 “to 15.000” OD
(Inches) Plus Minus Plus Minus Plus Minus Plus Minus
0.035 0.002 0.002 0.002 0.002 0.002 0.002
0.049 0.002 0.002 0.002 0.003 0.002 0.003
0.065 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.004
0.083 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005
0.095 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005
0.109 0.002 0.003 0.002 0.004 0.003 0.003 0.005 0.005
0.12 0.003 0.003 0.002 0.004 0.003 0.003 0.005 0.005
0.134 0.002 0.004 0.003 0.003 0.005 0.005
0.148 0.002 0.004 0.003 0.003 0.005 0.005
0.165 0.003 0.004 0.003 0.004 0.005 0.006
0.18 0.004 0.004 0.003 0.005 0.006 0.006
0.203 0.004 0.005 0.004 0.005 0.006 0.007
0.22 0.004 0.006 0.004 0.006 0.007 0.007
0.238 0.005 0.006 0.005 0.006 0.007 0.007
0.259 0.005 0.006 0.005 0.006 0.007 0.007
0.284 0.005 0.006 0.005 0.006 0.007 0.007
0.3 0.006 0.006 0.006 0.006 0.008 0.008
0.32 0.007 0.007 0.007 0.007 0.008 0.008
0.344 0.008 0.008 0.008 0.008 0.009 0.009
0.375 0.009 0.009 0.009 0.009
0.4 0.01 0.01 0.01 0.01
0.438 0.011 0.011 0.011 0.011
0.46 0.012 0.012 0.012 0.012
0.48 0.012 0.012 0.012 0.012
0.531 0.013 0.013 0.013 0.013
0.563 0.013 0.013 0.013 0.013
0.58 0.014 0.014 0.014 0.014
0.6 0.015 0.015 0.015 0.015
0.625 0.016 0.016 0.016 0.016
0.65 0.017 0.017 0.017 0.017

Ovality shall be within the above tolerances except when the wall thickness is less than 3% of the OD. In those cases the additional ovality shall be as follows, but the mean diameter shall be within the specified tolerance.

Outside Diameter Additional Ovality Tolerance (Inches)
(Inches)
Up to 2 0.01
Over 2 – 3 0.015
Over 3 – 4 0.02
Over 4 – 5 0.025
Over 5 – 6 0.03
Over 6 – 7 0.035
Over 7 – 8 0.04
Over 8 – 9 0.045
Over 9 – 10 0.05
Over 10 – 11 0.055
Over 11 – 12 0.06
Over 12 – 12.500 0.065
Outside Diameter Straightness Tolerance for any 3′ of Length
< 8.000″ 0.030″
≥ 8.000″ 0.060″

Experienced 15+ Years

Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets.

We Can Supply Follows Products with High Quality:

  1. Cold Rolled Steel Tube
  2. Cold Drawn Steel Tube
  3. Hollow Bar
  4. Honed Tube
  5. Plated Tube
  6. Plated Bar
  7. Boiler Tube

All Products According Quality Standard Strictly:

  1. ASTM: ASTM A519, ASTM A513.
  2. JIS:JIS G3441, JIS G3445, JIS G3466, JIS G3459.
  3. DIN: DIN1626, DIN1629, DIN2391, DIN2393, DIN2448, DIN2458.
  4. EN: EN10305.
  5. BS: BS6323.

Wide Range of Pipes to Fit Your Industry:

  1. OD from 5mm to 820mm.
  2. Wall Thickness from 0.1 to 100mm.
  3. Length up to 50mtr per pc.

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