Introduction to 35CrMo Bolts under HG/T 20613 Standard

2025-03-07 13:11:50

The 35CrMo bolt specified by the HG/T 20613 standard refers to a bolt manufactured in accordance with the HG/T 20613 standard, primarily made of 35CrMo alloy steel. Widely adopted in the chemical industry, this standard specifies requirements for fasteners such as bolts, including dimensions, tolerances, mechanical properties, and other criteria to ensure quality and reliability.

35CrMo is a high-strength alloy structural steel. Its main chemical composition includes carbon (C), silicon (Si), manganese (Mn), sulfur (S), phosphorus (P), chromium (Cr), and molybdenum (Mo). It exhibits the following characteristics:

1. High tensile strength and yield strength, enabling it to withstand significant tension and pressure, making it suitable for high-load environments.

2. Excellent impact toughness and fracture toughness, allowing it to resist brittle fracture under shock loads, thereby enhancing safety.

3. Relatively good corrosion resistance in environments with corrosive media, contributing to extended service life.

4. High-temperature stability, with the ability to operate continuously at temperatures up to approximately 500°C without significant creep or fracture.

Applications include:

1. Chemical industry: Used for connecting chemical equipment and pipelines to ensure sealing performance and structural stability.

2. Petrochemical industry: Employed in high-pressure, high-temperature, and highly corrosive environments to endure substantial loads and impacts.

3. Mechanical industry: Utilized in assembling large machinery and heavy-duty equipment to maintain structural integrity and safety.

4. Other fields: Such as mining machinery, bridges, automobiles, and motorcycles, where 35CrMo bolts are commonly used for secure fastening and connections.