Duty inputs
What controls the part
- Strength and buckling route
- Straightness
- Diameter tolerance
- Surface condition
Component route 01
Hydraulic Cylinder Rod & Piston Rod Steel
Round bars and processed bars for piston rods, cylinder rods, guide rods and other linear-motion components.
Steel bars for hydraulic applications should be reviewed against rod function, geometry, material condition, straightness, and downstream surface route.
Supply requirements
Hydraulic cylinder rod steel for demanding surface and straightness requirements.
Review grade, delivery condition, diameter, straightness and surface stage against the finished rod drawing.
- 01ComponentHydraulic rods
- 02GradeCK45 / 1045
- 03ConditionQ&T
- 04InspectionMTC and heat traceability
- 05RFQDrawing + destination
Candidate grades
Material routes to review
- CK45 / 1045Common medium-carbon starting route for drawing-led review.
- 42CrMo4 / 4140Alloy route for higher-strength component requirements.
- 40CrAlternative alloy route when the part and condition support it.
- Project-specific gradeConfirm from drawing, load and finishing route.
Supply and release
Condition before quotation
- Supply stages
- Q&T · Peeled or turned · Ground
- Inspection
- MTC and heat traceability · Straightness and diameter · Surface condition
Product options
Hydraulic cylinder rod materials and supply stages.
Choose from CK45 / 1045, 42CrMo4 / 4140 and other drawing-matched grades in peeled, turned, ground or finishing-prepared condition.
Function and Load
Use hydraulic cylinder rod and piston rod terms against the drawing
Hydraulic cylinder and piston rod orders start with the drawing and working load. Rod geometry, stroke, support conditions and the downstream surface route help define the material and supply stage.
- Drawing revision, solid or hollow form, and connection geometry
- Load direction, cycling, stroke, unsupported length, and end restraint
- Working environment, machining allowance, and plating or finishing interface
Material Route
Compare grade, standard, condition, and section as one supply route
Common starting points include CK45 / 1045, 40Cr and 42CrMo4 / 4140, each specified under its own controlling standard. Delivery condition, section size and required properties complete the material route.
- Controlling grade designation and standard edition
- Annealed, normalized, heat-treated, or +QT delivery condition
- Section size, required properties, and any approved substitution
Dimensions and Surface
Separate bar diameter, final rod geometry, and surface finish
Separate incoming bar size, machining allowance and final rod diameter so every production stage is clear. Add straightness, runout, surface finish and inspection method from the drawing or order.
- Incoming, pre-finish, and final diameters with tolerances
- Straightness, runout, and surface roughness at the agreed inspection stage
- Peeled, turned, ground, polished, or plating-prepared supply condition
Production handoff
From heat-treated bar to a finishing-ready rod.
Available routes include heat treatment, peeling or turning, centerless grinding and rough machining, with inspection at the agreed supply stage.
- Heat treatment
- Peeling or turning
- Centerless grinding
- Rough machining
Source imagery
Hydraulic rod products and processing.
Examples of bright bar, component forms and grade options for piston rod and cylinder rod production.
Raw or prepared bar supply for downstream rod processing.
Improved surface condition for machining or further finishing.
Application-oriented rod components can be supported depending on project needs.
RFQ checks
Common hydraulic cylinder rod questions.
Key topics include grade, dimensions, straightness, surface condition, finishing allowance and inspection documents.
Are CK45, 1045, 42CrMo4, and 4140 automatically interchangeable for hydraulic rods?
No. Grade labels from different standards do not establish automatic equivalence. The order should name the controlling standard and edition, product form, condition, section size, required properties, inspection basis, and whether substitution review is permitted.
Does a peeled, turned, or ground bar description guarantee final rod dimensions?
No. A process name does not by itself establish diameter tolerance, straightness, surface finish, defect limits, or machining allowance. Those requirements become binding only when their values, methods, and acceptance basis are stated in the accepted order.
Which records should be agreed for a hydraulic cylinder rod steel order?
Agree the MTC scope, heat or batch traceability, dimensional and straightness checks, surface inspection, test methods, drawing revision, packing list, marking, and any third-party inspection record before order release.
Technical references
Hydraulic rod material and inspection guides.
Practical guidance on grade selection, surface preparation and order documentation.
Chrome Plated Rod Material GuideReview base steel, straightness, surface preparation, coating scope, and final inspection as one drawing-controlled route.Compare hydraulic piston rod material routesDefine rod function, load case, buckling inputs, surface route, straightness, and evidence before choosing a material route.Compare 42CrMo4 and CK45 hydraulic rod routesCompare material routes by controlling standard, condition, geometry, process stage, and inspection basis.
Component RFQLock the route before quotation.
Send the part, grade or acceptable alternatives, size, condition, inspection scope, quantity and destination.