1. Definition and classification

Stainless steel bars are materials made by hot rolling or forging stainless steel ingots, which can be divided into round bars, square bars, hexagonal bars, etc. according to their shape; According to surface treatment, it can be divided into black rod, acid white rod, bright rod, etc. Common materials include 304, 316L, 310S, duplex steel, etc. Among them, 316L has better corrosion resistance than 304 in marine and chemical environments due to its molybdenum content and low carbon.

2. Production process and standards

Production process: Hot rolling, forging, and cold drawing. Hot rolled round steel is mostly used for mechanical parts or seamless steel pipe blanks.

Execution standards: Chinese GB/T1220-2007, American ASTM A276-2011, etc.

3. Application Fields

Widely used in industries such as hardware kitchenware, shipbuilding, petrochemicals, nuclear power, aerospace, etc., such as seawater equipment, food machinery, building decoration, etc. 316L is suitable for highly corrosive environments, while 304 is mostly used for tableware, boilers, etc.

4. Testing and Quality Management

Chemical composition, mechanical properties, surface defects, and other testing are required to ensure compliance with ISO9001 certification. Common problems include surface cracks and crystal cracking defects, which need to be optimized through annealing or slow cooling processes.

5. Selection suggestions

Material selection: Match according to corrosion resistance, strength, or ease of processing requirements.

Specification confirmation: The diameter and length units need to be unified to avoid calculation errors.