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  • SUS304

  • SUS304

    SUS304 is an austenitic stainless steel specified in JIS G 4303 "Stainless Steel Bar". It is the most popular type of stainless steel, and is sometimes called "18-8 stainless steel" because it contains 18% chromium (Cr) and 8% nickel (Ni). SUS304 is resistant to rust and corrosion, including corrosion resistance in air, acid resistance, pitting corrosion resistance, and crevice corrosion resistance. It also has high-temperature strength, high-temperature oxidation, high-temperature sulfurization, low-temperature strength, and low-temperature toughness, which maintain heat resistance and strength in both high-temperature and cryogenic environments. The hardness of Type 304 is HB: 187 or less in solution heat-treated condition. Specific gravity is 7.93.

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用途
Food equipment, general chemical equipment, nuclear power, construction, home appliances, automotive parts, etc.
代表成分

SUS304 is an austenitic stainless steel containing chromium (Cr) of 18.00~20.00, nickel (Ni) of 8.00~10.50, and carbon content (C) of less than 0.080. It is sometimes referred to as 18Cr-8Ni stainless steel.

SUS304 C Si Mn P S Ni Cr
成分値 0.08 or less 1.00 or less 2.00 or less 0.045 or less 0.030 or less 8.00~10.50 16.00~18.00
機械的性質

The mechanical properties of SUS304 in its solution heat treatment state are: hardness (HB): 187 or less, proof strength: 205N/㎟ or more, tensile strength: 520N/㎟ or more, elongation: 40% or more, drawing: 60% or more.

耐力 Ｎ/mm2 引張強さ Ｎ/mm2 伸び ％ 絞り % 硬さ(HB)
Over 205 Over 520 Over 40 Over 60 187 or less
加工性・特性
Compared to carbon steel, SUS304 is difficult to cut due to its viscosity, etc. However, when compared to stainless steel, SUS304 is the most common material, and is probably the most common among stainless steels. For high-precision parts, SUS303 with sulfur (S) added to improve free-cutting properties is used.

加工事例

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