Standard map
Common cross-references
- GB route
- 40Cr; name the governing standard and edition
- ISO / EN route
- 41Cr4; compare the ordered chemistry, condition, and properties
- JIS route
- SCr440; compare the ordered chemistry, condition, and properties
Grade route 02
40Crround bar
Commonly used for mechanical parts, transmission shafts, and gear components.
Grade specifications
Confirm the grade and condition before comparing prices.
Cross-references are a starting point. The drawing standard, condition, size and inspection scope define the order.
- 01Grade40Cr
- 02StandardConfirm standard and edition
- 03ConditionAnnealed / QT
- 04PartShafts & pins
- 05ReleaseChemical check
Supply window
Published specification
- Diameter
- 20 - 300 mm
- Length
- 3 - 12 m
- Condition
- Annealed / QT
Property reference
Mechanical route
- Property route
- State the standard, delivery condition, diameter, and required property target
- Test basis
- State the test position, sampling plan, and required result document
Chemistry reference
- Composition basis
- Use the chemistry table in the standard named on the order
- Substitution check
- Compare the full tables before approving 41Cr4 or SCr440
Matched components
Connect the material to the part.
Application and release
Key details for your order.
- Transmission shafts
- Gear components
- Mechanical parts
- Automotive components
- Chemical check
- Mechanical testing
- Ultrasonic testing available
- Dimensional inspection
RFQ checks
Questions buyers ask first.
Is 40Cr the same as 41Cr4 or SCr440?
40Cr, 41Cr4, and SCr440 are commonly reviewed as cross-reference grade names, but the required project standard should be stated first. Chemical, mechanical, delivery condition, and inspection details still need order-specific review.
Should 40Cr be ordered annealed, normalized, or QT?
The delivery condition depends on the part route and downstream process. Buyers should state whether they need annealed, normalized, QT, hot rolled, forged, or machined supply, plus any hardness or mechanical-property target.
What inspection points matter for 40Cr round bar?
Common inspection points include chemical composition, mechanical testing when specified, hardness target if required, dimensions, surface condition, MTC, traceability, and third-party inspection when the project requires it.
Technical references
Go deeper only where needed.
Grade RFQConfirm the standard before quotation.
Send the grade standard, size, quantity, condition, application, inspection documents and destination.