What is stainless steel plate
Stainless steel sheet is a flat, rectangular metal sheet rolled from stainless steel (primarily containing alloying elements such as chromium and nickel). Its core characteristics include excellent corrosion resistance (thanks to a self-healing chromium oxide protective film formed on the surface), aesthetics and durability (its bright surface is amenable to a variety of treatments), high strength, and hygienic and easy-to-clean properties. These qualities make it an indispensable key material in a wide range of applications, including architectural curtain walls and decoration, kitchen equipment and appliances, medical devices, food processing, chemical containers, and transportation. It also offers excellent machinability (forming and welding) and the environmental advantage of being 100% recyclable.
Characteristics of stainless steel plates
1. Excellent Corrosion Resistance
► Core Mechanism: A chromium content of ≥10.5% forms a dense chromium oxide passivation film, isolating it from corrosive media (water, acids, salts, etc.).
► Strengthening Elements: Adding molybdenum (such as grade 316) resists chloride ion corrosion, while nickel improves stability in acidic and alkaline environments.
► Typical Applications: Chemical equipment, marine engineering, and food processing pipelines (resistant to corrosion under long-term exposure to acid, alkali, and salt spray).
2. High Strength and Toughness
► Mechanical Properties: Tensile strength exceeds 520 MPa (such as 304 stainless steel), with some heat treatments doubling this strength (martensitic 430).
► Low-Temperature Toughness: Austenitic 304 maintains ductility at -196°C, making it suitable for cryogenic environments such as liquid nitrogen storage tanks.
3. Hygiene and Cleanability
► Surface Characteristics: The non-porous structure inhibits bacterial growth and is food-grade certified (e.g., GB 4806.9).
► Applications: Surgical instruments, tableware, and pharmaceutical equipment (can be sterilized with high-temperature steam without residue).
4. Processing and Environmental Advantages
► Plasticity: Austenitic 304 steel is capable of deep drawing (cupping value ≥ 10mm), making it suitable for stamping complex parts.
► Surface Treatment: Mirror polishing (Ra ≤ 0.05μm) and decorative processes such as etching are supported.
► 100% Recyclable: Recycling reduces carbon footprint, with a recycling rate exceeding 90% (a LEED credit for green buildings).
Application of stainless steel plates in life
1. New Energy Heavy-Duty Transportation
Economical, high-strength duplex stainless steel plates and battery frames have been successfully implemented in new energy heavy-duty trucks, addressing the rust and fatigue failure challenges faced by traditional carbon steel in the high-humidity, highly corrosive coastal environments. Its tensile strength is over 30% higher than that of conventional Q355 steel, and its yield strength is over 25% higher. It also achieves a lightweight design, extending frame life and ensuring battery frame accuracy during battery replacement. Nearly 100 domestic heavy-duty trucks have been operating in Ningde's coastal industrial zone for 18 months without deformation or corrosion. Twelve heavy-duty trucks equipped with this frame have been exported overseas for the first time.
2. Hydrogen Energy Storage and Transportation Equipment
Jiugang's S31603 (JLH) austenitic stainless steel, certified by the National Special Inspection Institute, is specifically designed for use in liquid hydrogen/liquid helium (-269°C) cryogenic pressure vessels. This material maintains excellent ductility, impact toughness, and low susceptibility to hydrogen embrittlement even at extremely low temperatures, filling a gap in specialty steels in Northwest China and promoting the production of domestically produced liquid hydrogen storage tanks.
3. Large-Scale Energy Infrastructure
The Yarlung Zangbo River hydropower project utilizes 06Cr13Ni4Mo low-carbon martensitic stainless steel (each unit requires 300-400 tons), with a total estimated total of 28,000-37,000 tons, to resist high-velocity water impact and cavitation erosion. Economical duplex stainless steel is used in bridge expansion joints and transmission supports to withstand the high-humidity and corrosive environment of the plateau, with a potential market size of tens of billions of yuan.
4. Durable Building and Industrial Structures
Architectural curtain walls (such as the Shanghai Tower), chemical reactors (316L for crystal corrosion resistance), and medical surgical instruments (electrolytically polished 304/316L) rely on stainless steel for its weather resistance, hygiene, and decorative properties. Food processing equipment and appliance linings (430/444 steel) utilize its easy-to-clean properties and resistance to chloride ion corrosion.
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Post time: Jul-31-2025