Equivalent standards
EN 1.7225, ASTM 4140, JIS SCM440, GB 42CrMo
42CrMo4 / 4140
42CrMo4 / AISI 4140 round bar for application-ready supply.
Quenched and tempered alloy steel round bar for high-load hydraulic, shaft, threaded, and rotating parts.
Procurement Summary
Technical points buyers normally confirm first.
Use this page as a starting point for RFQ discussion. Exact chemistry, mechanical properties, delivery condition, testing, and certificate requirements should be confirmed against the active order standard.
Delivery and surface routes
- QT
- Black
- Peeled
- Machined
Inspection discussion
- Chemical composition verification
- Mechanical testing
- Dimensional inspection
- UT on request
What buyers should confirm
- Equivalent standard and active order specification
- Diameter, length, tolerance, and quantity
- Delivery condition and surface route
- Processing needs such as cutting, peeling, grinding, threading, or machining preparation
- Testing, certificate, traceability, packing, and destination requirements
Application Fit
Typical application routes.
Confirm grade, delivery condition, surface route, testing requirements, and downstream process before final quote.
Confirm grade, delivery condition, surface route, testing requirements, and downstream process before final quote.
Confirm grade, delivery condition, surface route, testing requirements, and downstream process before final quote.
Confirm grade, delivery condition, surface route, testing requirements, and downstream process before final quote.
Private Factory Processing
Processing support can be matched to the order route.
Processed through JOTAIN's private factories when project requirements call for heat treatment, peeling, grinding, straightening, chrome plating or cut-to-length preparation.
Factory capability
Review JOTAIN's heat-treatment and bright-bar processing factories before confirming delivery condition, surface route, inspection, and packing requirements.
Processing & RFQ
Connect grade choice with the required supply route.
Before quotation, confirm the processing route and document package together with the grade. This helps avoid quoting a bar that matches the grade name but not the downstream manufacturing need.
Discuss QT, normalized, or annealed route when the application requires controlled condition.
Review surface and dimensional expectations before machining or assembly.
State MTC, testing, traceability, and third-party inspection needs during RFQ review.
FAQ
Common buyer questions.
Is 42CrMo4 / 4140 the same as the listed equivalent standards?
42CrMo4 / 4140 is commonly discussed with EN 1.7225, ASTM 4140, JIS SCM440, GB 42CrMo. Final equivalence should be confirmed against the active order standard, drawing, and property requirements.
What delivery condition should I specify for 42CrMo4 / 4140?
Common discussion points include QT, Black, Peeled, Machined. The right condition depends on downstream application, machining route, and inspection requirements.
What applications use 42CrMo4 / 4140?
42CrMo4 / 4140 is commonly discussed for Hydraulic cylinder rods, Shaft bars, Threaded components, Heavy machinery. Buyers should confirm load, surface route, and document requirements before quotation.
What should I include in an RFQ?
Share diameter, length, QT target, quantity, application, destination port, and testing requirements.
RFQ
Send an RFQ for 42CrMo4 / 4140.
Share diameter, length, QT target, quantity, application, destination port, and testing requirements.