Types of carbon steel and their properties
Carbon steel can be classified into three categories according to its carbon content: low-carbon steel (or mild-carbon steel), medium-carbon steel and high-carbon steel . Their carbon content, microstructure and properties compare as follows:
| Carbon content (wt.%) | Microstructure | Properties | Examples |
| Low-carbon steel | < 0.25 | Ferrite, pearlite | Low hardness and cost. High ductility, toughness, machinability and weldability |
| Medium-carbon steel | 0.25 – 0.60 | Martensite | Low hardenability, medium strength, ductility and toughness |
| High-carbon steel | 0.60 – 1.25 | Pearlite | High hardness, strength, low ductility |
PRODUCT DETAILS
| SPHC / SPHD / SPHE Carbon Steel Coil |
SPHC, SPHD and SPHE pickled & oily hot rolled carbon steel coils are professional deep-drawing base materials graded by JIS G3131. With progressively optimized ductility and ultra-low impurity control, these stamping-grade coils deliver exceptional forming performance from general shallow stamping to complex deep drawing. Widely used for home appliance shells and automotive structural parts, they serve as the core base stock for cold rolling and precision metal stamping factories. Haiwo steel group is a professional metal manufacturing company from Foshan, China. Welcome to contact us for further cooperation! |
| Product
Parameters |
|
| Product
Name | SPHC / SPHD / SPHE Carbon Steel Coil |
| Production
Process | Hot Rolling,
Cold Rolling |
| Material
Standards | JIS G3131 (SPHC / SPHD / SPHE) |
| Regular Size | Common Thickness Range 1.2mm – 10.0mm | Hot-selling sizes: 1.5/2.0/2.5/3.0/4.0/6.0/8.0mm Standard Coil Dimensions Width: 1000/1250/1500mm; customizable slitting & cutting available |
| Surface Treatment | Hot rolled pickled & oiled (P&O) clean finish Uniform anti-rust oil coating for long-distance ocean transportation Scale-free flat surface for direct stamping and painting Custom edge trimming and deburring |
| Delivery Temper | Hot rolled, fully soft annealed temper for maximum formability |
| Full Supporting Certificates | EN10204 3.1 MTC, SGS/BV mechanical property test report, stamping & elongation inspection certificate, chemical composition analysis report, CE compliant documents |
| Exported to | Vietnam, Thailand; Malaysia, Indonesia; Turkey; India, Brazil |
| Core Strengths |
Graded stamping performance: SPHC for general stamping, SPHD for deep stamping, SPHE for ultra-deep drawing, covering all forming demands Ultra-low carbon formula ensures superior ductility, effectively avoids cracking and wrinkling during complex bending and stretching Pickled & oiled surface removes oxide scale, providing clean substrate for subsequent coating, painting and cold rolling processing Strict thickness tolerance guarantees consistent forming accuracy for automated stamping production lines Excellent weldability and surface flatness, reduces post-processing rejection rate for precision parts Versatile graded substitution for mainstream cold drawing grades, balancing quality and production cost |
| Scope of Application |
Home appliance industry: Refrigerator, air conditioner and washing machine outer & inner casings Automotive manufacturing: Auto interior brackets, cover panels and shallow/deep drawing structural parts Precision hardware: Stamped metal fittings, thin-gauge decorative components Cold rolling substrate: Raw base material for producing SPCC/SPCD cold rolled steel coils General machinery: Light equipment shells, protective covers and stamped structural accessories |
