Which 4140 round bar sizes are published?
The website publishes a general 25 mm to 66 mm round-bar diameter range. Exact 4140 grade-size-condition availability is confirmed for each enquiry.
Specify 4140 by Standard, Size and Condition
Jain Steels Group reviews AISI and SAE 4140 round bar requirements for shafts, gears, tooling, machined parts and forged engineering components. Buyers should identify the exact governing standard and revision because the grade name alone does not define every chemistry, condition or acceptance requirement.
The published general round-bar diameter range is 25 mm to 66 mm. Final 4140 grade, size, length, tolerance, heat-treatment condition, quantity and production-route availability are confirmed only after technical review of the purchase specification.
Share Your RequirementPublished Supply Information
Published information is a general reference. The final quotation and approved purchase specification control every order.
| Product category | Alloy Steel Round Bars |
|---|---|
| Grade availability | AISI/SAE 4140; exact governing standard and condition required |
| Published size information | 25 mm to 66 mm published round-bar diameter range |
| Length and tolerance | Confirmed against the drawing, standard and purchase requirement |
| Supply condition | Confirmed against the grade, downstream process and applicable standard |
| MOQ and lead time | Confirmed after grade, size, quantity and destination review |
Applications
Transmission shafts and axles
Confirm the grade, dimensions, condition, application and inspection requirements for this route.
Gears and drive components
Confirm the grade, dimensions, condition, application and inspection requirements for this route.
Forged engineering components
Confirm the grade, dimensions, condition, application and inspection requirements for this route.
Machined high-strength parts
Confirm the grade, dimensions, condition, application and inspection requirements for this route.
4140 Round Bar Sizes, Stock and Price Enquiries
A reliable quotation cannot be based on the words ‘4140 bar’ alone. Price and lead time depend on diameter, cut length, quantity, supply condition, heat treatment, tolerances, testing, documentation and delivery destination. Published information does not represent live stock or a fixed price list.
- Exact grade designation and governing standard
- Size, length, tolerance and supply condition
- Quantity, application and downstream process
- Testing, inspection, traceability and documentation
- Required delivery destination and programme
Related Technical Pages
Frequently Asked Questions
Is EN19 identical to AISI 4140?
No automatic identity should be assumed. The governing standards, chemistry, condition, properties and inspection requirements must be compared before substitution.
How is 4140 round bar price determined?
Quotation depends on the controlling standard, diameter, length, quantity, condition, testing, documentation and delivery destination.
What should a 4140 enquiry include?
Send the grade designation, standard, diameter, length, tolerance, condition, quantity, application, heat-treatment route, testing and destination.
Discuss Your Alloy Steel Round Bars Requirement
Send the technical specification, quantity and delivery location for availability and quotation.
Contact Jain Steels Group