304 Condition B is a strained hardened variant of 304 Annealed. 304B has higher strength, which is achieved by cold working. This material is not heat treatable.
Specifications:
UNS S30464, QQ-S-763(E Am. 1)(F), AMS-QQ-S-763, ASTM-A-276, ASTM-A-193 Grade B8 CL2, ASTM A-887, Type 304B4,
Applications:
Fastener products, hex cap screw, studs, nuts, bolts, washers.