9840 Round Bar: Material Profile
9840 is used for loaded parts that need deeper hardening than plain-carbon grades can provide.
Availability can depend on diameter and condition, so include the mechanical properties, heat treatment, testing, quantity, and delivery date.
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 through-hardening
- High strength potential
- Good toughness
- Good wear and fatigue resistance
Common Applications
- Shafts and axles
- Gears and couplings
- Forged machinery parts
- Heavy-equipment 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 9840 Round Bar
We quote 9840 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.
