Editorial Technical Reference

Forged Steel Piston Rod

This page explains how Forged Steel Piston Rod is classified within Metal Forging, Pressing, Stamping. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

View Full Specifications Explore Manufacturing Sources

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Forged Steel Piston Rod

Definition

A forged steel piston rod is a critical component in hydraulic and pneumatic cylinders, transmitting linear force from the piston to the external load while maintaining alignment and resisting bending moments. Manufactured through precision forging, it achieves superior grain flow and mechanical properties compared to machined alternatives, enhancing fatigue resistance and strength-to-weight ratio. This product is essential for industrial machinery, construction equipment, and automotive applications where reliability under cyclic loading is paramount. In B2B manufacturing supply chains, it serves as a key interface between piston assemblies and external mechanisms.

Typical specifications include a rod diameter of 20–100 mm (ISO 6195), length of 200–3000 mm, surface hardness of 50–60 HRC (ISO 18265), straightness tolerance of 0.05 mm/m (ISO 1101), and surface finish of Ra 0.2–0.4 (ISO 1302). Material grades on file are AISI 4140 and AISI 4340 steel, with an alternative grade 42CrMo4 (DIN EN 10083-3) noted. Mechanical properties include a minimum yield strength of 600 MPa, tensile strength of 800–1000 MPa, elongation at break of at least 12%, and impact toughness of at least 34 J at -40°C (ISO 148-1). Operating temperature ranges from -40°C to 85°C, and weight varies from 2.5 to 185 kg depending on dimensions.

These values are directory reference ranges and must be confirmed for the specific model and application. Standards listed are procurement references, not certifications. Always verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The piston rod transmits linear force from the piston to the external mechanism. It must maintain precise alignment and resist bending moments under load. The rod's surface hardness and finish reduce friction and wear, while its material properties ensure fatigue resistance. Proper installation and alignment are critical to prevent premature failure.

Common Materials

AISI 4140 Steel, AISI 4340 Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rod DiameterRequired	20–100 mm	Nominal diameter of the rod bodyISO 6195
LengthRequired	200–3000 mm	Overall length of the piston rod
Surface HardnessRequired	50–60 HRC	Rockwell hardness of the rod surfaceISO 18265
Straightness ToleranceRequired	0.05/1000 mm/m	Maximum deviation from perfect straightnessISO 1101
Surface Finish	Ra 0.2–0.4 Ra	Average surface roughnessISO 1302
Yield Strength	≥600 MPa	Minimum yield strength of the materialISO 6892-1
Material Grade	42CrMo4	High-strength alloy steel; alternative grades on request.DIN EN 10083-3
Tensile Strength	800–1000 MPa	Typical range for quenched and tempered condition.ISO 6892-1
Elongation at Break	≥12 %	Minimum elongation ensures ductility.ISO 6892-1
Impact Toughness	≥34 J	Charpy V-notch at -40°C for low-temperature applications.ISO 148-1
Operating Temperature	-40–85 °C	Seals and lubricants limit upper temperature.
Weight	2.5–185 kg	Approximate weight for standard diameters and lengths.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Rod Body Part
Main structural element transmitting linear force

Material: Forged Steel
Threaded End Part
Connection interface for piston or external attachment

Material: Forged Steel
Hard Chrome Plating Optional Part
Wear-resistant surface coating

Material: Chromium

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Forged Steel Piston Rod.

Manufacturers of Forged Steel Piston Rod

Manufacturer profiles associated with Forged Steel Piston Rod.

Sourcing Forged Steel Piston Rod from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What materials are available for this piston rod?

The directory lists AISI 4140 and AISI 4340 steel as standard options, with an alternative grade 42CrMo4 per DIN EN 10083-3. Confirm availability and suitability with the supplier.

What is the typical surface hardness?

The surface hardness is specified as 50–60 HRC per ISO 18265. This is a reference range; verify the actual value for your specific rod.

Can the rod be used in low-temperature environments?

The impact toughness is specified as at least 34 J at -40°C per ISO 148-1, indicating suitability for low-temperature applications. However, operating temperature range is -40°C to 85°C, limited by seals and lubricants.

How do I verify the straightness tolerance?

The straightness tolerance is 0.05 mm/m per ISO 1101. This should be confirmed with the manufacturer's inspection certificate for the specific rod.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Forged Steel Piston Rod

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Up to 5000 psi (345 bar)
other spec:	Surface hardness: 55-62 HRC, Straightness tolerance: 0.1 mm/m
temperature:	-40°C to +200°C