4130 Alloy Steel Bar

4130 Alloy Steel Round Bar is highly versatile and used for a wide range of applications including automotive, aerospace, bicycling, construction, and firearm projects. It offers good strength, weld-ability, impact and abrasion resistance while also being easy to machine. 4130 steel round bar/rod available in full size and custom cut lengths.

4130 Alloy Steel Bar

AISI 4130 alloy steel is a medium carbon, low alloy steel in ASTM A29 standard. ASTM 4140 steel also commonly referred to as a chromoly steel, or chrome moly steel, containing nominally 0.28-0.33% Carbon, 0.8-1.1% Chromium and 0.15-0.25% Molybdenum. It is similar to 4140 steel which has a higher carbon level (0.28-0.33%), giving 4130 material improved weld-ability, at the expense of through thickness strength. With the proper heat treatment it is also readily machined. Annealing ASTM 4130 alloy steel offers excellent ductility.

AISI Alloy 4130 Steel Supply Range

  • Steel Round Bar 4130: diameter 8mm – 3000mm;
  • 4130 Steel Plate/Flat Bar: Thickness 10mm – 1500mm x Width 200mm – 3000mm;
  • 4130 Steel Tube: Outer Diameter 4mm to 800mm;
  • Surface Finish: Black, Rough Machined, Peeled, Turned or as per given requirements.
  • MOQ: 10 tons per size for new production.

AISI 4130 Steel Specification and Relevant Standards

4130 Alloy Steel Bar

ASTM 4130 Steels And Equivalents Chemical Composition

4130 Alloy Steel Bar Chemical Composition

Application of 4130 Steel

AISI 4130 steel alloy used primarily in the construction of commercial and military aircraft and ground support systems. This low alloy 4130 steel widely used in many applications, and some typical application areas are as follows: Commercial aircraft, Aircraft engine mounts; Military aircraft; Automotive; Machine tools; Hydraulic tools; Auto racing; Aerospace; Oil and gas industries – as forged valve bodies and pumps agricultural and defense industries etc. 

4130 Alloy Steel Bar

This grade of steel has applications in the oil and gas, and firearms industries. Typical applications for 4130 steel bar stock include parts that used under high stress such as pumps, valve bodies, fittings, chassis, and more.


IBC (Tianjin) Industrial Co., Ltd is here for you if you need an efficient alloy steel round bar supplier and a centerless ground bar supplier who provides you with quality 4130 alloy bar! We work closely with our clients to ensure that their precision ground bars delivered to the correct specifications. Call us or request a quote!

4130 Alloy Steel Bar

Contact with IBC Group

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