Q345C for zero degree state

Q345C Steel – Optimized for 0°C Low-Temperature Service

Product Overview:
Q345C is a low-alloy high-strength structural steel grade defined under the Chinese GB/T 1591 standard, with enhanced performance for low-temperature environments. It offers an ideal balance of strength, toughness, and weldability, and is specifically suitable for projects requiring stable performance at temperatures as low as 0°C.

As a “C” grade, Q345C undergoes impact testing at 0°C, ensuring improved cold weather toughness compared to Q345B. It is widely used in steel structures, bridges, pressure vessels, ships, and low-temperature industrial environments.

Technical Specifications:

• Standard: GB/T 1591

• Grade: Q345C

• Delivery Condition: Hot rolled, normalized, or TMCP

• Thickness Range: 6 mm – 100 mm

• Width & Length: Customizable per customer needs

Mechanical Properties:

Advantages:

• Reliable impact resistance at 0°C for cold-region projects

• Good weldability and formability for fabrication

• High strength-to-weight ratio for efficient structural design

• Cost-effective alternative to imported low-temp steels

• Certified under GB/T 1591 and widely used in structural design codes

Applications:

• Cold-region steel structures and bridges

• Offshore platforms and port equipment

• Pressure vessels operating near freezing point

• Wind tower components

• LNG, chemical, and oil storage facilities

Quality Assurance:

• Mill test certificate (MTC) per GB/T 1591

• Optional ultrasonic testing (UT), Z-direction test (Z15/Z25/Z35)

• Impact testing per batch at 0°C

• Third-party inspection (SGS, BV, TUV) available

• Customized processing: cutting, drilling, beveling, surface treatment