Stainless steel 302 is a higher-carbon variant of 304; it offers slightly greater strength and hardness – especially after cold working – while retaining 304's same corrosion resistance.
Stainless steel 302 shares the same 18% chromium, 8% nickel base as 304, but allows up to 0.15% carbon versus 304's 0.08% cap, which gives it higher strength and hardness – especially after cold working – at some cost to weldability.
Corrosion resistance matches 304, including the same vulnerability to chloride stress cracking in marine environments, where 316 is preferred instead. Annealed 302 is non-magnetic like other austenitic grades, though cold working induces slight magnetism.
Stainless steel 302 is a good choice for springs, fasteners, shafting, conveyor belting, and instrument parts needing more strength than annealed 304 provides.