The brand number is DC0 1(St 12). Generally, DC03(St 13) is used for stamping DC04(St 14, St 15) for deep stamping and DC05(BSC2) for ultra-deep stamping (ST 16). BSC 3) The material grade for ultra-deep drawing is ordinary cold-rolled steel, ST 13 is cold-worked steel for stamping, ST 14 is deep drawing grade ST 15, low-carbon ultra-deep drawing grade ST 16 is ultra-low carbon ultra-deep drawing grade ST 12. SPCC ST 13 is equivalent to DC03, SPCD ST 14 is equivalent to DC04, SPCE 08AL ST 15 is equivalent to DC05, SPCF ST 16 is equivalent to DC06 and spce-t.

chemical composition

Brand carbon, silicon, manganese, phosphorus, nitrogen and titanium

ST 15 0.004 0.02 0. 18 0.009 0.008 0.002 0.054

Category generation number

Advanced finishing surface FB(O3) Advanced finishing surface FC(O4) Ultra-advanced finishing surface FD(O5)

Surface structure code

Hemp surface d bright surface b

Chemical composition of similar materials

The chemical composition of the brand is% C Mn P S alt A Ti B DC 01(ST12) ≤ 0.10 ≤ 0.50 ≤ 0.035 ≤ 0.025 ≥ 0.020-DC03 (ST13) ≤ 0. 04(St 14, ST15) ≤ 0.08 ≤ 0.40 ≤ 0.025 ≤ 0.020 ≥ 0.020-dc05 (BSC 2) ≤ 0.008 ≤ 0.30 ≤ 0.020 ≥ 0.0/kloc- The yield strength MPa and tensile strength MPa of brand A shall not be less than the elongation after fracture (L0=80mm, b=20mm)% shall not be less than B value, C shall not be less than B value, and C shall not be less than the nominal thickness mm.

Specification for tensile strain marking of steel plates and strips

The steel plate and steel strip with brand number DC0 1(St 12) should be stored at room temperature, and the steel plate and steel strip with brand number DC03(St 13) should be stored at room temperature. And the tensile strain mark DC04 (ST65438+) shall be St 15), and the steel plate and steel strip of DC05(BSC2) shall be stored at room temperature within 6 months after manufacture, and the steel plate and steel strip of DC06(St 16, ST 14-T, BSC. Ensure that tensile strain markers are not used. There are a few defects on the surface of FB (O3) that do not affect the formability and coating adhesion, such as slight scratches, indentations, pits, roll marks and oxidation color. Excellent finished FC (O4) products have no obvious defects visible to the naked eye, and the other side must at least meet the requirements of FB. On the surface of ultra-high-grade finished products, the good side of FD (O5) products must be free from defects, that is, it cannot affect the appearance quality after painting or electroplating, and the other side must at least meet the requirements of FB. When the surface structure has pits (D), the average roughness Ra is 0.6 micron.