UNI C25 Alloy Steel Bar C25 Round Bars C25 Rods

Product Description

UNI C25 (1.0406) Steel Overview

UNI C25 is an Italian standard medium-low carbon steel. It falls into the category of "structural steels" and is widely used for components that require better mechanical properties than basic mild steel (like C15) but still maintain excellent ductility and weldability.

In the European unified system, it is often equivalent to C25 or C25E (the latter being the "quality" version with controlled impurities).

Technical Specifications

Chemical Composition (%)

International Equivalents

Key Characteristics

1. Workability: UNI C25 is highly versatile. It is easy to cold-form and has very good machinability ratings in the normalized state.

2. Weldability: It is considered easily weldable. Unlike higher carbon steels (like C45), C25 does not typically require complex pre-heating protocols for standard welding thicknesses.

3. Heat Treatment: While it can be hardened, the response is moderate compared to C40 or C45. It is frequently used in the normalized or as-rolled condition. It can be case-hardened if a high surface wear resistance is required.

Common Available Formats

• Round Bars: Commonly supplied as hot-rolled (black) or cold-finished (bright). Used for turning and general machining.

• Rods: Utilized for forging applications, wire drawing, or small-diameter fasteners.

• Plates and Sheets: Often used for structural components that require more "meat" than mild steel for safety factors.

Common Applications

• Mechanical Parts: Lever arms, tie rods, links, and spacers.

• Fasteners: Medium-strength bolts, screws, and studs.

• Automotive/Agriculture: Parts for agricultural machinery and low-stress automotive components.

• Construction: Support pins and forged fittings.

Processing Temperatures

• Hot Forming: 850°C – 1100°C.

• Normalizing: 870°C – 900°C.

• Annealing: 850°C – 880°C.

• Hardening: 860°C – 890°C (Water or Oil quench).