Introduction of Austenitic Stainless Steel

    Min Hwei specializes in manufacturing Stainless Steel Fasteners which are mainly 
    used 300 series Austenitic Stainless Steel as raw materials. The standard chemical 
    composition of this type of Stainless Steel is 18%(Cr) and 8%(Ni), thus it is also 
    popularly known as 18-8 Stainless Steel - a kind of superior metal material which 
    conforms to environmental protection.

Physical Properties of Austenitic Stainless Steel

    The Austenitic Stainless Steel possess excellent properties of corrosion 
    resistibility and cold-working ability. In low-temperature condition, it maintains 
    the ability of extension and impact-resistibility which prevent embrittlement and 
    phase change from happening; even in high-temperature condition, the embrittlement 
    is also seldom occurred. Besides, since the Austenitic Stainless Steel can't be 
    hardened by heat treatment, it needs to be done through cold work to enhance its 
    hardness and strength.
    The Austenitic Stainless Steel is non-magnetic under normal status, but it will 
    trun to be slightly-magnetic after cold work.

Application Index of Stainless Steel in Different Circumstances

Application of Austenitic Stainless Steel

    It's mainly applied in Petrochemical industry, Chemical industry, Food processing 
    industry, Machinery industry, Building materials and Marine facilities... Etc.

The Requirements of Chemical Composition

Chemical Requirements(Ref. ASTM A493)

Alloy Composition, %Maximum Except as Shown
C Mn P S Si Cr Ni Cu Mo Other
1 S30400 304 0.08 2.00 0.045 0.030 1.00 18.0 to 20.0 8.0 to 10.5 1.00    
1 S30403 304 L 0.03 2.00 0.045 0.030 1.00 18.0 to 20.0 8.0 to 12.0 1.00    
1 S30430 XM7 0.10 2.00 0.045 0.030 1.00 17.0 to 19.0 8.0 to 10.0 3.0 to 4.0    
2 S31600 316 0.08 2.00 0.045 0.030 1.00 16.0 to 18.0 10.0 to 14.0   2.00 to 3.00  
2 S31603 316 L 0.03 2.00 0.045 0.030 1.00 16.0 to 18.0 10.0 to 14.0   2.00 to 3.00  
Note: XM7 equal to 302HQ

Chemical Requirements(Ref. DIN EN ISO 3506)

Grade Chemical Composition
C Si Mn P S Cr Mo Ni Cu
Austenitic A2 0.1 1 2 0.05 0.03 15 to 20 a. 8 to 19 4 b.c.
A4 0.08 1 2 0.045 0.03 16 to 18.5 2 to 3 10 to 15 1 c.d.
    a. Molybdenum may be present at the discretion of the manufacturer. However,
       if for some applications limiting of the molybdenum content is essential, 
       this must be stated at the time of ordering by the purchaser.
    b. If the chromium content is below17%, the minimum nickel content should be12%.
    c. For Austenitic Stainless Steels having a maximum carbon content of 0.03%, 
       nitrogen may be present to a maximum of 0.22%.
    d. At the discretion of the manufacturer the carbon content may be higher where 
       required to obtain the specified mechanical properties at larger diameters, but 
       shall not exceed 0.12% for Austenitic Steels.