Types of stainless steel
There are over 150 grades of stainless steel, of which fifteen are most common.
The AISI (American Iron and Steel Institute) defines the following grades among others:
The AISI (American Iron and Steel Institute) defines the following grades among others:
- 200 Series—austenitic iron-chromium-nickel-manganese alloys
- 300 Series—austenitic iron-chromium-nickel alloys
Type 301—highly ductile, for formed products. Also hardens rapidly
during mechanical working.
Type 303—free machining version of 304 via addition of sulfur
Type 304—the most common; the classic 18/8 stainless steel
Type 316—Alloy addition of molybdenum to prevent specific forms of
corrosion
- 400 Series—ferritic and martensitic alloys.
- 300 Series—austenitic iron-chromium-nickel alloys
Type 301—highly ductile, for formed products. Also hardens rapidly
during mechanical working.
Type 303—free machining version of 304 via addition of sulfur
Type 304—the most common; the classic 18/8 stainless steel
Type 316—Alloy addition of molybdenum to prevent specific forms of
corrosion
- 400 Series—ferritic and martensitic alloys.
Austenitic means a metallic, non-magnetic solid solution of carbon and iron that exists in steel above the critical temperature of about 723°C. The rate of cooling determines the relative proportions of these materials and therefore the mechanical properties (e.g.hardness , tensile strength) of the steel.
Ferritic and martensitic alloys are highly corrosion resistant, but far less durable than austenitic grades and cannot be hardened by heat treatment.
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Sunray Stainless Steel Co.,Ltd
Email:info@sunraysteel.com
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