Start with the actual rod route
The hydraulic application page notes that piston rods, cylinder rods, guide rods, and linear-motion components require suitable strength, straightness, surface quality, and machining consistency. The buying discussion should begin with the actual part and downstream route.
Review suitable grade families
42CrMo4 / 4140 is often reviewed for high-strength cylinder rod applications. CK45 / 1045 can be practical for medium-duty rod applications where machinability and processing flexibility matter. 40Cr can also fit rod and mechanical component routes.
Surface and straightness matter
A cylinder rod route may require black bar, peeled bar, machined bar, polishing preparation, or other surface-oriented processing. Buyers should state surface condition, straightness expectation, machining allowance, and any finishing route.
Quality checks to discuss
For rod applications, inspection can include chemical composition verification, mechanical property testing, dimensional inspection, surface checks, traceability support, and third-party inspection support when required by the project.
Buyer RFQ checklist
- Rod type: piston rod, cylinder rod, guide rod, or related component
- Recommended or required steel grade
- Diameter, length, straightness, and surface condition
- Delivery condition and downstream finishing route
- Mechanical property and inspection requirements
- Packing and export destination
Inquiry support
Send the grade, size, delivery condition, inspection needs, and destination.
JOTAIN can review the material route, processing needs, quality checks, and export coordination around the actual project requirement.