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1055 Steel Sheet
1055 Steel Sheet
With carbon content ranging from 0.52% to 0.60%, close to the lower limit of high-carbon steel, 1055 steel sheet is a medium carbon steel sheet, but it is also considered transitional carbon steel. 1055 steel sheet contains a small amount of manganese. This steel alloy offers durability, hardness, and resistance to impact, wear, and shock, making it commonly selected for components that require moderate toughness and durability, such as gears, shafts, and forging applications. 1055 steel sheets are more affordable than other types of carbon steel alloys, making them suitable for tools with a limited budget. Additionally, it does not display the brittleness typically associated with high-carbon steel materials.
Product Specifications
| Dimension Name | Value |
| Material | Medium carbon steel |
| Thickness | 4.0mm – 250mm (customizable) |
| Width | 1000mm – 4500mm (standard: 1500/2000/2500 mm) |
| Length | 2000mm – 16000mm (customizable) |
| Chemical Composition | Carbon (C): 0.52% – 0.60% Silicon (Si):0.15% – 0.35% Manganese (Mn): 0.60% – 0.90% Sulfur (S): ≤0.040% Phosphorus (P): ≤0.35% Chromium (Cr): ≤ 0.25% (optional for improved hardenability) Nickel (Ni): ≤ 0.20% Cuprum (Cu): ≤ 0.25% |
| Mechanical Properties | Hardness:180 – 240 HB (annealed) / 50 – 58 HRC (quenched & tempered) Tensile Strength: 630 – 780MPa (normalized/quenched & tempered) Yield Strength: ≥ 380MPa (annealed state) Elongation: ≥ 16 (annealed) / ≥ 12 (normalized) Impact Toughness: ≥ 27 (at -20°C, quenched & tempered) |
| Surface Finish | Hot-Dip Galvanizing, Electroplating, Phosphating, Nitriding, Shot Blasting, Painting, Black Oxide Coating |
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Advantages
- Excellent mechanical properties: 1055 steel sheet combines high strength and toughness. The tensile and yield strengths of 1055 steel sheet are significantly higher than those of 1045 steel. After treatment, the toughness of 1055 steel sheet is improved, with increased hardness and impact toughness, making it less likely to fail catastrophically under impact loads. The wear resistance of treated 1055 steel sheet is more than three times greater than that of low-carbon steel.
- Outstanding processing performance: Through heat treatment, 1055 steel sheet can improve machinability, optimize formability, and enhance weldability.
- High cost performance: 1055 steel sheet contains no expensive alloy elements (such as chromium, molybdenum), making its price 30%-50% lower than that of alloy steel, which means significant cost performance.
Applications
- Mechanical Manufacturing: 1055 steel sheets have high strength and wear resistance, making them ideal for forging gears, tie rods, rolls, and shaft components, which can prolong the service life of these parts.
- Automotive Industry: 1055 steel sheets can maintain stability under fluctuating loads; therefore, they are suitable for manufacturing gears for transmission systems, crankshafts, and heavy-duty axles.
- Tool Manufacturing: After quenching, 1055 steel sheets reach a hardness of 58 HRC, meeting high-precision machining requirements, and can be used in tools, hammers, and molds.
- Construction and Bridges: 1055 steel sheets and steel structural components provide strength and stability for buildings and bridges.
- Agricultural Machinery: The wear-resistant qualities of 1055 steel sheets help resist mud abrasion and lower maintenance costs, so they are used in tillage plow shares, wear plates, and other farming tools.
Treatments
1055 steel sheet can optimize performance through various treatment processes to meet different scenario requirements.
Heat Treatment
- Annealing/Normalizing: Reduces hardness, improves machinability, refines grains.
- Quenching + Tempering: Surface hardness reaches 50-58 HRC, wear resistance increases by 5 times; after quenching and tempering, strength reaches over 800 MPa, balancing toughness.
- Induction/Laser Hardening: Localized hardening, minimal deformation, suitable for precision parts.
Surface Treatment
- Galvanizing: Hot-dip galvanizing (80-150 μm) increases corrosion resistance by 10 times, making it suitable for outdoor structures.
- Carburizing/Nitriding: Surface hardness of 60-62 HRC (carburizing) or 550-700 HV (nitriding), wear resistance enhanced by 3 times.
- Shot Peening/Phosphating: Increases fatigue strength by 20%-30%, and coating adhesion increases by 40%.
