เกรดสแตนเลส

What is Stainless Steel? สแตนเลส, หรือที่เรียกว่าเหล็กอิน็อกซ์ (จากภาษาฝรั่งเศส “สแตนเลส”), is a steel alloy that contains at least 10.5% โครเมียม. This chromium content forms a protective oxide layer, giving the steel its corrosion-resistant properties.

Stainless steel has been developed to resist various corrosive environments. It is often used to improve workplace safety, extend building lifespan, and ensure hygiene in food preparation. Stainless steel is also environmentally friendly because it can be melted down, recycled, and reused.

Composition and Types In addition to chromium, stainless steel may contain elements such as nickel, ไนโตรเจน, และโมลิบดีนัม. These elements influence the steel’s properties, including its machinability, ความสามารถในการเชื่อม, and strength.

Main Stainless Steel Categories

• ออสเตนนิติก: The most commonly used type. It contains at least 7% nickel and is non-hardenable by heat treatment. Common in household items, ท่อ, ส่วนประกอบโครงสร้าง, and architecture.
• เฟอริติก: Similar to mild steel but with better corrosion resistance. Often used in appliances and indoor structures.
• มาร์เทนซิติก: A hard, strong steel with about 13% โครเมียม. Common in knives and turbine blades.
• ดูเพล็กซ์: Combines austenitic and ferritic structures. Contains about 22-25% โครเมียมและ 5% นิกเกิล, along with molybdenum and nitrogen. Preferred in chemical processing and piping.
• การตกตะกอน การแข็งตัว (พีเอช): Hardened through heat treatment. Contains aluminum, ทองแดง, หรือไทเทเนียม.

Common Grades and Applications

• 303: A machinable austenitic grade, improved with sulfur. Used in shafts, วาล์ว, และอุปกรณ์อาหาร.
• 304/304ล: The most common stainless grades. 304L has reduced carbon to improve weldability.
• 310: Designed for high-temperature use. Resists oxidation up to 1150°C.
• 316: Second most common grade, enhanced with molybdenum for better corrosion resistance. Widely used in marine, ยา, and food industries.
• 317: คล้ายกับ 316, but with higher alloy content for better resistance to sulfuric compounds.
• 321: Stabilized with titanium to prevent carbide precipitation.
• 347: Stabilized with columbium/tantalum. Good for high-temperature and aerospace use.
• 410: A martensitic alloy used in turbine blades, วาล์ว, and pump shafts.
• 416: Known for excellent machinability. Lower corrosion resistance due to added sulfur.
• 630 (17-4 พีเอช): High strength and moderate corrosion resistance. Used in aerospace and mechanical parts.

Specialty Grades

• 904ล: High-alloy austenitic steel with copper. Excellent resistance to reducing acids and chloride attack.
• 2205 ดูเพล็กซ์: Offers twice the strength of standard austenitic grades. Ideal for oil, แก๊ส, และการใช้งานทางเคมี.
• 2507 (ซุปเปอร์ดูเพล็กซ์): Higher chromium and nitrogen content. Offers superior corrosion resistance and strength.
• แม็ก 20: A super-austenitic alloy with high resistance to sulfuric acid and chloride environments.

Nickel and High-Performance Alloys

• นิกเกิล 200: Pure nickel. Used in food handling and magnetic components.
• นิกเกิล 201: Low-carbon version of Nickel 200. Better at high temperatures.
• แม็ก 400 (Monel): Nickel-copper alloy. Strong and corrosion-resistant, especially in seawater.
• แม็ก 600 (Inconel): Nickel-chromium-iron alloy. Resists heat and corrosion. Used in aerospace and steam systems.
• แม็ก 625: Nickel-chromium-molybdenum alloy. High strength and corrosion resistance up to 1800°F.
• แม็ก 800 (Incoloy): Nickel-iron-chromium with copper and molybdenum. Good for corrosive chemical processes.
• แม็ก 825: คล้ายกับ 800, but stabilized with titanium. Used in marine and chemical processing.
• Alloy C-276 (Hastelloy): Nickel-molybdenum-chromium with tungsten. Excellent chemical resistance, especially in chlorides and acids.

Form Options Stainless steel is available in forms such as round bar, flat bar, ท่อ, หลอด, จาน, แผ่น, เปลื้องผ้า, and wire, making it suitable for diverse applications across industries.

Teda Ganghua Metal Company supplies a wide range of stainless steel products and specialty alloys in various forms, สนับสนุนอุตสาหกรรมด้วยวัสดุคุณภาพสูงและบริการจากผู้เชี่ยวชาญ.