ST12 ST13 ST14 ST15 Carbon Steel Sheet

ST12, ST13, ST14, and ST15 are cold-rolled low-carbon steel plates in accordance with the German standard (DIN 1623), and are graded according to stamping performance. ST12 is a common grade with a tensile strength of 270-410MPa, suitable for simple bending and shallow forming, such as cabinets and boxes; ST13/ST14 has improved stamping performance, with an elongation of ≥34%, suitable for medium-complex parts, such as automotive interior parts; ST15 is a deep drawing grade with an elongation of ≥38% and a tensile strength of ≤280MPa, and is specifically used in high-strength deep drawing scenarios, such as fuel filters and precision housings.