Steel alloy 4130 (ST4130), also known as Chrome Moly after the 2 key elements of its composition, chromium, and molybdenum, is a general-purpose alloy steel widely used by the aviation and motorsports industries due to its weldability, fabrication, and mild hardenability in all offered forms (tubes, bars, sheets and plates). They are available in two different material states (Normalized and Annealed) depending on the process of how the material is heated and cooled.
The Normalized condition (sometimes referred to as "Condition N") is the harder and stronger condition and is best used when forming is not needed. Normalizing relieves internal stress on steel and improves toughness in steels that may harden after the cold working process. The Annealed condition (sometimes referred to as "Condition A") is the softer and formable condition and is best used when forming is needed. Annealing relieves internal stresses, softens and makes the material more ductile.
4130 alloy steel (Chrome Moly) seamless round tubes are offered as part of our own branded (AVIATIONEU NEW ERA) product lines in Normalized (N ) or Annealed (A) conditions indicated by the letters "NRZ" and "ANL" respectively in the product reference code (SKU). They have been for years the standard of the aircraft industry. These tubes offer good strength and weldability without compromising steel abrasion or impact resistance and can also be made even stronger through heat treatment. They are commonly used in in structural applications, gears, fasteners, and aircraft exteriors. Tensile Strength: 90,000 PSI. Available in a range of outer diameters, wall thicknesses and pre-cut lengths in inches or cut to order (CTO) lengths of 12 inches (1 foot)) or multiples. Apperating price of CTO tubes is per foot (12 inches). Depending on the supplier, they comply with different standards/specifications, such as MIL-T6736 standard or ASTM/A S1906 specifications. Unless otherwise mentioned, there is additional cost if manufacturing test reports are required. For additional information, please refer to the supplied documentation or contact us.