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EMD Connecting Rod for railway locomotive

EMD Connecting Rod for railway locomotive

Product No.：2026627161919
Price：nogotiation
Material：Alloy steel
Standard：AAR
mould charge：NO
Production time：60
weight：25 Kg
Package：Wooden Box
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TECHNICAL SPECIFICATION: FORGED TRAIN CONNECTING ROD

1. PRODUCT OVERVIEW

The train connecting rod is a critical mechanical component in railway rolling stock and steam locomotives. It serves as the linkage between the train's drive wheels and the piston-crankshaft system, converting the reciprocating linear motion of the piston into rotational motion of the drive wheels.

The connecting rod assembly typically consists of the connecting rod body, big end cap, small end bushing, big end bearing bush, and connecting rod bolts. The component is subjected to alternating compressive and tensile loads from gas forces, swing motion, and reciprocating inertial forces. It must possess sufficient fatigue strength and structural rigidity to prevent failure.

2. PRODUCT ATTRIBUTES

Product name : Train connecting rod (locomotive connecting rod)

Manufacturing method : Forging (hot die forging / open die forging)

Application : Railway industry – electric locomotives, diesel locomotives, steam locomotives, train drive systems

Material types : Carbon steel, alloy steel, stainless steel

Typical forging weight: 20 kg – 100+ kg (depending on locomotive type and design)

Cross-section design : I‑beam or H‑beam section for optimal strength‑to‑weight ratio

3. MATERIAL SPECIFICATIONS

Common material grades include:

Carbon steels:

Alloy steels:

Stainless steels: various grades for corrosion‑resistant applications upon request.

4. MECHANICAL PROPERTIES (typical values for alloy steel grades)

Tensile strength : up to 1240 MPa (180,000 psi)

Yield strength : up to 1095 MPa (159,000 psi)

Hardness (HRC) : 33 – 40 (after heat treatment)

Fatigue strength : ~650 MPa (for 4140 grade)

Elongation at break: up to 16 – 17%

Note: Actual values depend on material grade, heat treatment, and section size.

5. MANUFACTURING PROCESS

The connecting rod is produced through hot forging using advanced forging equipment (e.g., hydraulic press). Typical sequence:

1. Billet preparation / 2. Heating / 3. Upsetting / 4. Die forging / 5. Trimming / 6. Heat treatment / 7. Machining

Quality control includes dimensional inspection, non‑destructive testing (ultrasonic, magnetic particle), and mechanical property verification through destructive testing.