Chromoly tubing refers to a type of steel tubing that is made from chromium and molybdenum alloys. The term "chromoly" is a combination of the words "chromium" and "molybdenum." This tubing is also known as chromoly steel tubing or chrome-moly tubing.
CHROMOLY TUBING CHARACTERISTICS
Chromoly tubing is valued for its exceptional strength, durability, and resistance to corrosion. It is commonly used in various industries and applications that require high strength-to-weight ratios, such as automotive, aerospace, bicycle manufacturing, and structural engineering. The addition of chromium and molybdenum to the steel composition enhances its mechanical properties. The chromium provides increased resistance to oxidation and corrosion, while the molybdenum improves the steel's strength and toughness at high temperatures.
CHROMOLY TUBING ADVANTAGES
High Strength: Chromoly tubing has excellent strength-to-weight ratios, meaning it provides high strength while being relatively lightweight. This makes it ideal for applications that require strong, durable components without adding excessive weight.
Durability: Chromoly tubing is known for its exceptional durability and resistance to fatigue. It can withstand high levels of stress, making it suitable for applications subjected to heavy loads or repetitive stress, such as roll cages, frames, and structural supports.
Improved Performance: The properties of chromoly tubing, including its high strength and stiffness, contribute to improved performance in various applications. It allows for better energy transfer, reducing flex and enhancing overall performance and responsiveness, particularly in motorsports and bicycle frames.
Corrosion Resistance: The addition of chromium in chromoly steel provides increased resistance to corrosion and oxidation compared to regular steel. This makes chromoly tubing more suitable for outdoor or high-moisture environments where protection against rust is essential.
Weldability: Chromoly tubing is highly weldable, allowing for easy fabrication and assembly. It can be welded using various methods, including TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding, enabling precise and strong joints.
Versatility: Chromoly tubing is versatile and can be used in a wide range of applications. It is commonly employed in motorsports, aerospace, bicycle manufacturing, structural engineering, and other industries where strength, durability, and weight optimization are crucial.
Chromoly tubing is often used in the construction of roll cages, frames, chassis, and other components in motorsports and automotive applications. In the bicycle industry, it is frequently used for high-performance frames due to its strength and lightweight characteristics.
Specifications | ASTM A29 and ASME SA29 |
Dimensions | ASTM, API and ASME |
Size in MM | 4 to 219 Wall Thckness = 0.5 to 20 |
Specialized in | Large Diameter Size |
Length in MM | 13500 |
Type | Seamless / Welded / ERW / Fabricated Supplier and Manufacturer |
Form | Hydraulic, Round |
Length | Double Random, Single Random, Cut Length |
End | Beveled End, Plain End, Treaded |
Tube Marking | All Tube are marked as follows: Supplier or Manufacturer’s Name, Standard, Grade, OD, Thickness, Length, Heat Number |
AISI 4130 | Nickel | Carbon | Molybdenum | Manganese | Silicon | Iron | Copper | Sulfur | Phosphorous | Chromium |
0.50 Maximum | 0.28 To 0.33 | 0.15 To 0.25 | 0.40 To 0.60 | 0.15 To 0.35 | 97.3 To 98.22 | – | 0.025 Maximum | 0.035 Maximum | 0.80 To 1.10 |
Mechanical Properties
Density | Yield Strength | Elongation | Tensile Strength | Melting Point |
0.28 | 460 | 20 % | 560 | 2580 |
Grade 4130 Equivalent
Std | UNS | werkstoff no | European Standards | Japanese Industrial Standards | British Standards | GOST | AFNOR |
AISI 4130 | G41300 | 1.7218 | 25CrMo4 | JIS G4105 | BS 970 | – | – |
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