Technical

    • Most of Racetech Steels' Steel is USA or European origin. Therefore the dimensions are almost all imperial dimensions. For your convenience we have converted them to metric equivalents,  eg. a 1" diameter may be referred to as 25mm, the actual measurement will be 25.4mm.
    • Tube is often referred to as Pipe. The difference is pipe is used as a vessel to transport liquid or gasses through, in this instance the inside diameter is what is important. Where as tube is used in structures. Since the engineers work typically with the outside diameter, it has become the critical measurement.
    • 650mpa (the minimum tensile strength of Chromoly 4130).
    • 350mpa (the minimum tensile strength of our mild steel 1020 and 1026).
    • mpa, (Mega Pascals).
    • Tensile strength (The resistance to stretch {tension}).
    • Yield strength (The mpa it takes to deform).
    • Elongation, (The ratio of yield, and ultimate (actual) tensile).
    • The difference between minimum and ultimate (minimum is what the material must be to pass specification. Ultimate is what the material actually is. i.e a Racetech 350 tube can be around either 400mpa or as high as 750mpa, depending on the quality and processes the material goes through).
    • CDS (Cold Drawn Seamless, made from a solid).
    • CDW (Cold Drawn Welded, made from a welded strip, then drawn to size).
    • DOM (Drawn Over Mandrel, same as CDW above).
    • ERW (Electric Resistance Welded, made from a welded strip, rolled to size).
    • Precision Mechanical Tube (Tube made to tighter tolerances with special alloys).
    • Alloy (A metal made from a cocktail of raw elements).
    • Element (A substance in its most simplest form).
    • 4130 (A hi-tensile Alloy steel manufactured to the standard SAE-4130. Also known as Chromoly, CrMo, Chrome-Moly, Chromium Molybdenum)
    • Periodic table of the elements (A fancy name for a list of all known elements in solid liquid and gas).

     

      Below is a rough table displaying the mechanical properties and chemical makeup of the popular steel tubes we stock. each batch will display its own unique properties but you can use this as a guide.
    CDW 1020 CDS 1026 CDS 4130
       ASTM-A513  ASTM-A519 AMS-T-6736
    Tensile Strength 540 705 900
    Yield Strength 415 615 720
    Elongation 23% 23% 20%




    C Carbon 0.2 0.23 0.3
    Si Silicon 0.23 0.21 0.26
    Mn Manganese 0.49 0.76 0.55
    P Phosphorus
    		 0.012 0.012 0.006
    S Sulfur
    		 0.013 0.007 0.004
     Cu Copper
    		0.02 0.13
    Ni Nickel
    		0.02 0.12
    Cr Chromium
    		0.05 0.9
    Mo Molybdenum
    		0.01 0.17
    AL Aluminium 0.039

      click here for  CAMS roll cage requirements

     

     

     

  • Keep an eye on this space for more interesting technical bits in the coming months. 

    • Literature & Media

     

     

     

    A very informative article we have come across from Lincoln Welding, relating to welding 4130 Chromoly
    Racetech Catalogue 2013 Racetech Catalogue 2013 (3751 KB) 4130 Weight Calculator 4130 Weight Calculator (14 KB) Racetech Product Catalogue Racetech Product Catalogue (2997 KB) lincoln lincoln (99 KB)

    Below is an informative guide to welding 4130 in race car application