4120 Round Bar: Material Profile
4120 offers alloy hardenability with low core carbon, supporting machining and forming before case hardening.
The carburizing cycle, case depth, hardness, and core-property requirements should be defined for the finished component.
Purchase to the controlling ASTM, SAE, AMS, or customer specification. Section size, supply condition, mechanical properties, surface limits, testing, and heat/lot traceability can change the acceptable material and processing route.
Key Characteristics
- Good case-hardening response
- Tough low-carbon core
- Alloy hardenability
- Machinable before heat treatment
Common Applications
- Gears and pinions
- Bushings and sleeves
- Shafts and arbors
- Wear-resistant machine components
Specification Requirements
Identify the governing specification and revision, product form, section size, condition, mechanical properties, testing, and certification requirements. The purchase specification and material certification govern the order.
Request Pricing for 4120 Round Bar
We quote 4120 for manufacturers and commercial buyers. Requirements of 3,000–10,000 lb are welcome, along with multi-ton and truckload programs.
We are not a retail metal store. Small personal-use, typical single-bar, and cut-piece orders are generally not a fit. The material field is prefilled and remains editable; add the specification, size, condition, total weight, processing, testing, required date, and ship-to location.
