High Fatigue Strength Hot Rolled Sf Spring Flat Steel for Automotive Industry

High Fatigue Strength Hot Rolled Sf Spring Flat Steel for Automotive Industry. High Fatigue Strength: Designed to withstand repeated bending stress without cracking for long service life. Precise Dimensional Control: Strict thickness tolerance of +/-0.05mm ensures consistent fit and performance. Clean Surface Quality: Free from decarburization, cracks, and scale for superior surface finish. Multiple Steel Grades: Available in EN45A, 60Si2Mn, 55Si7, 65Mn, SAE 5160, and SAE 9260. Customizable Hardness: Q&T hardness can be customized to 40-50 HRC based on specific requirements. Value-Added Processing: Services include cutting-to-length, slitting, and heat treatment (annealing/quenching). Comprehensive Certification: MTC provided for every order with optional SGS/BV third-party inspection support. Fast Delivery for Stock: Stock sizes can be shipped within 7-15 days after payment confirmation.