Excess prime SAE 1074 annealed spring steel in slit coils, 0.073" x 4.73". Approximately 80,000 lbs available, minimum order 40,000 lbs. Melted and manufactured in the USA. Material is in stock in Detroit, MI and ready to ship. Typical properties (Heat B4599A): C 0.70, Mn 0.65, Si 0.21, P 0.026, S 0.002, Cr 0.18. Tensile approx. 529 MPa, yield approx. 350 MPa, hardness approx. 82–84 HRB. Produced to SAE J403 ​/​ ASTM A684​/​A684M-17. Sample cert attached. Mill certs will be provided for all coils prior to shipment.