SA285GrC钢板产品介绍

SA285GrC is an American standard medium to low strength carbon steel plate, with the execution standard equivalent to ASTM A285/A285M. This steel plate is specifically designed for the manufacture of boilers, pressure vessels, and other pressure equipment. Due to its balanced strength, excellent weldability, and processing performance, it has become a core material in fields such as petrochemicals, power energy, and nuclear energy equipment.

The production and inspection of SA285GrC follow a series of strict standards and specifications.

The chemical composition of SA285GrC is strictly controlled to ensure its good weldability, processability, and mechanical properties.

Note: The above is the smelting analysis composition, and the finished product analysis allows for slight deviations.

SA285GrC has balanced mechanical properties that can meet the design requirements of most medium and low pressure vessels.

The production of SA285GrC adopts a precisely controlled modern process:

• Smelting: Initial smelting using electric or converter furnaces, followed by LF furnace refining and VD vacuum degassing treatment to effectively remove gases and impurities from the molten steel and improve purity.
• Continuous Casting: Protective pouring is used to prevent oxidation.
• Rolling: Controlled rolling process is adopted, which optimizes the internal structure and comprehensive properties of the plate by precisely controlling the rolling temperature and deformation. To ensure permeability, the total reduction rate of the last three passes in the finishing rolling stage is usually required to be ≥40%.
• Heat Treatment: It can be delivered in controlled rolling state, hot rolling state or normalized state as required. High temperature tempering treatment can be used to eliminate internal stress when necessary.

The product must undergo ultrasonic testing according to the A578/A578M C-level standard. This standard is stricter than the ordinary A and B levels, and can effectively detect defects such as interlayers, pores, and cracks that may exist inside the steel plate, ensuring the internal compactness and safety of the material when used in critical pressure-bearing parts.

Through-thickness performance (Z-direction performance) assurance can be provided according to user requirements, with common grades being Z15, Z25, and Z35. This performance is improved by controlling sulfur content and smelting process, which can effectively prevent lamellar tearing of the steel plate when it bears significant loads in the thickness direction. It is crucial for heavy pressure vessels with complex welding nodes.

The dimensions, shape, weight, and allowable deviations of the product must comply with the relevant provisions of the ASTM A20/A20M standard.

Due to its reliable performance, SA285GrC is widely used in the manufacture of the following equipment:

• Petrochemical Industry: Oil storage tanks, liquefied gas tanks, spherical tanks, reactors, heat exchangers, towers, separators.
• Power Industry: Boiler drums, high-pressure water pipes for hydropower stations, turbine volutes.
• Nuclear Power Field: Nuclear reactor pressure vessels (non-primary circuit), boiler accessories.
• Other Fields: Engineering machinery structural parts, building load-bearing components, ship boilers, etc.

Processability: It has good cold and hot working properties, and is easy to perform forming operations such as cutting, bending, and rolling.

Weldability: Low carbon equivalent (C≤0.28%) gives it excellent welding performance, and it can be welded using a variety of welding processes. Preheating before welding is recommended (for example, preheat to 100~150°C when the thickness is >25mm), slow cooling after welding, and stress relief heat treatment when necessary to reduce cold crack sensitivity.

SA285GrC steel plate is a technically mature, stable performance, and cost-effective material for pressure vessels. Through controlled rolling process to optimize organizational performance, combined with A578 C-level ultrasonic testing and A20 tolerance control, it ensures high reliability from internal quality to external dimensions. It perfectly balances strength, toughness, weldability, and economy, making it an ideal choice for manufacturing various medium and low pressure pressure vessels and boiler components.

Please note: Specific technical parameters and delivery conditions should be based on the contract signed by the supplier and demander and the quality certificate. Before selection and use, please be sure to confirm whether it meets your specific design specifications and usage conditions.