AISI 302 is placed above AISI 304 in tensile strength. AISI 304 is placed a little bit above AISI 302 in resistance to corrosion.
AISI 304
Cr: 18 Ni : 8
AISI 305
Cr: 17 Ni : 12
AISI 305 is similar to AISI 302 & 304 in resistance to corrosion. AISI 305 is same level with AISI 316 in tensile strength.
AISI 316
Cr : 17 Ni : 12 Mo : 2
AISI 316 has excellent resistance to corrosion and fine resistance to sea water. it is placed under AISI 304 in tensile strength and characterized by non-magnetic.