... state: Hot forged +Normalizing/Annealing+Peeled + Quench+ Temper Spring steel Chemical ingredients:C1. hot rolled ordinary carbon round bar ... Cr12, 5CrMnMo, 5CrNiMo, 9SiCr, 4CrW2Si 6. hot rolled sping steel Size: 12mm-250mm Material: 60Si2Mn, 65Mn, 50CrVA, 60Si2CrVA 7. ... hot rolled die steel, bearing steel, carbon tool steel Size: 12mm-250mm Material: H13, T8, T9, ...