AISI 1045 steel is a high-quality medium carbon steel widely recognized for its balanced mechanical properties, excellent machinability, and stable performance after heat treatment.

It is internationally equivalent to:

• China: 45# (GB/T)

• Japan: S45C (JIS G4051)

• Germany: C45 / CK45

• Europe: EN C45 / 1.0503

With a carbon content of 0.43–0.50%, AISI 1045 steel provides an ideal combination of strength, toughness, and wear resistance, making it the most commonly used material in rebar mechanical connection systems.

Why AISI 1045 Is Ideal for Rebar Couplers

Rebar couplers are critical structural components. Their performance directly affects load transfer, tensile strength, and overall structural safety. AISI 1045 steel has become the industry’s preferred choice due to the following advantages:

1. Proven Mechanical Strength

• Tensile strength: approx. 570–700 MPa

• Yield strength: approx. 310 MPa

• Elongation: ~16%

These properties ensure that the coupler can reliably transfer tensile forces and meet or exceed the strength of connected rebars.

2. Excellent Machinability

In hot-rolled or normalized condition, 1045 steel offers:

• Smooth threading performance

• Stable dimensional accuracy

• High production efficiency

This makes it highly suitable for internal and external threading, which is essential for rebar coupler production.

3. Stable Performance After Heat Treatment

Compared with low-carbon steels such as Q235, AISI 1045 shows:

• Higher hardness

• Better wear resistance

• Improved fatigue performance

This ensures long-term reliability in demanding construction environments.

4. Cost-Effective and Industry-Proven

AISI 1045 steel has been used in mechanical and structural applications for decades. Its mature supply chain, stable quality, and reasonable cost make it the most economical choice for large-scale engineering projects.

GLUS Rebar Couplers – Manufactured with AISI 1045 Steel

At GLUS, we specialize in the professional manufacturing of rebar couplers using AISI 1045 / 45# / S45C steel as our primary raw material.

Our Manufacturing Advantages

• Carefully selected 45# steel pipe and bar materials

• Precision CNC machining for accurate threading

• Strict quality inspection throughout production

• Tensile strength and dimensional checks before delivery

By controlling every key process from raw material to finished product, we ensure consistent quality and reliable performance in every GLUS rebar coupler.

Applications of AISI 1045 Steel in Rebar Couplers

AISI 1045 steel is widely used in:

• Standard rebar couplers

• Upset-threaded rebar connectors

• Parallel thread couplers

• Construction and infrastructure projects

• High-rise buildings, bridges, tunnels, railways, and industrial structures

Its mechanical properties make it suitable for both general construction and high-load structural applications.

Conclusion

AISI 1045 / 45# / S45C steel has become the most widely applied material for rebar coupler manufacturing due to its:

• Reliable strength

• Excellent machinability

• Stable quality after heat treatment

• Proven performance in engineering projects worldwide

As a professional manufacturer, GLUS continues to use this industry-standard material to produce safe, durable, and cost-effective rebar couplers, supporting construction projects with dependable mechanical connections.

If you would like to learn more about:

• Rebar coupler specifications

• Material selection

• Customized solutions

Feel free to contact GLUS for professional technical support.