Buyer problem
A piston rod RFQ should not stop at grade and diameter. The buyer also needs to define final use, load, straightness, surface route, plating expectation, and document scope.
Hydraulic Rods
CK45 vs 42CrMo4 for Piston Rods
Piston rod buyers often begin with CK45 or 42CrMo4, then refine the route around load, straightness, surface finishing, chrome plating, and inspection expectations.
Quick Answer
What buyers should know first.
CK45 is commonly reviewed for standard rod and general machined applications. 42CrMo4 is normally reviewed when higher strength, toughness, or more demanding hydraulic service is involved.
Comparison points
Review delivery condition, peeling or grinding route, chrome thickness if required, straightness expectation, final diameter, and downstream machining or assembly needs.
RFQ checklist
Send grade or acceptable equivalent, diameter, length, quantity, delivery condition, chrome plating requirement, surface expectation, certificate need, and destination port.
Common Mistakes
Avoid avoidable RFQ delays.
- Requesting piston rod material without stating whether chrome plating is required.
- Comparing CK45 and 42CrMo4 without explaining load or final application.
- Omitting final diameter, surface expectation, or straightness requirement.
Related Pages
Continue through the relevant buyer path.
Open this page to connect the topic with product, processing, document, or RFQ details.
Open this page to connect the topic with product, processing, document, or RFQ details.
Open this page to connect the topic with product, processing, document, or RFQ details.
Open this page to connect the topic with product, processing, document, or RFQ details.
FAQ
Common buyer questions.
Can CK45 be used for hydraulic rods?
It can be reviewed for standard rod applications when the buyer confirms load, condition, surface route, and document requirements.
When should 42CrMo4 be reviewed?
Review 42CrMo4 when the rod requires higher strength or toughness than a standard carbon steel route may support.
Should the RFQ mention chrome plating?
Yes. If chrome plating is required, include finished diameter, thickness expectation, surface requirements, and inspection scope.
RFQ
Turn this insight into a clear RFQ.
Include delivery condition, processing requirement, destination port, testing requirements, and certificate expectations so the supply route can be reviewed clearly.