304 (UNS S30400)
304 Austenitic Stainless Steel
UNS S30400
Introduction
Austenitic stainless steel 304 (UNS S30400) is the standard “18/8” austenitic stainless
and it is the most versatile and most widely used stainless steel. 304 (UNS S30400) also is a low carbon (0.08% max) version of basic 18-8 also known as 302. It is an economical and versatile corrosion resistant stainless steel suitable for a wide range of general purpose applications with good mechanical properties and strength.Both 304 and 304L are non-magnetic in the annealed condition but may become slightly magnetic as a result of cold working or welding.304L is an extra low-carbon variationof 304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding.Both grades can be used extensively.
Properties
304 (UNS S30400) has excellent corrosion resistance in a wide range of media. It resists ordinary rusting in most architectural applications and is also resistant to most food processing environments.And the chemical composition, mechanical properties, weldability and corrosion/oxidation resistance entitles 304 (UNS S30400) the best all-round performance at relatively lower cost.
Chemical Composition of 304 (UNS S30400)（ %）
Grade C Mn Si P S Cr Mo Ni N
304 min. - - - - - 17.5 - 8.0 -
max. 0.07 2.0 0.75 0.045 0.030 19.5 - 10.5 0.10
Application
Stainless steel 304 (UNS S30400) is typically used on:
• sinks and splashbacks
• saucepans
• cutlery and flatware
• architectural panelling
• sanitaryware and troughs
• brewery, dairy, food and pharmaceutical production equipment
• springs, nuts, bolts and screws
• medical implants
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