AISI 1144 Carbon Steel Hot Rolled Bar Flat Plate

• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Stainless Steel Scrap
• Technique: Hot Rolled
• Shape: Bar Plate Sheet
• Surface Treatment: Bar Plate Sheet
• Model NO.: round bar
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• Transport Package: Wooden
• Specification: 6-400mm 2mm-25mm
• Trademark: Smooth
• Origin: China
• HS Code: 7214100000
• Production Capacity: 5000 Ton/Year

Product Description

AISI 1144 Carbon Steel
1144 steel, also known as stress-proof steel, is a free-machining carbon steel that contains added sulfur and lead to improve its machinability. It is known for its excellent machinability, high tensile strength, and good wear resistance. 1144 steel is commonly used in applications where high strength, good surface finish, and ease of machining are required.

Chemical Composition (Typical):
·Carbon (C): 0.40 - 0.48%
·Manganese (Mn): 1.35 - 1.65%
·Phosphorus (P): Maximum 0.04%
·Sulfur (S): 0.24 - 0.33%
·Silicon (Si): 0.15 - 0.35%
·Lead (Pb): 0.15 - 0.35%

Mechanical Properties (Typical):
·Tensile Strength: 689 - 896 MPa (100 - 130 ksi)
·Yield Strength (0.2% offset): 621 - 793 MPa (90 - 115 ksi)
·Elongation at Break: 12 - 15%
·Reduction of Area: 40 - 50%
·Hardness (Brinell): 235 - 311 HB

Physical Properties:
·Density: 7.85 g/cm³
·Thermal Conductivity: 49.8 W/m·K (at 100°C)
·Specific Heat Capacity: 0.486 J/g·K
·Thermal Expansion: 11.5 µm/m·K (20-100°C)

Heat Treatment:
1144 steel is typically supplied in the cold-drawn or turned and polished condition. It is not generally heat treated since the addition of sulfur and lead promotes the formation of fine chips during machining. However, stress relieving may be performed if necessary to minimize residual stresses.

Applications:
·Shafting: Used in the manufacture of shafts, axles, and spindles requiring high strength and excellent machinability.
·Fasteners: Commonly used in the production of bolts, nuts, screws, and studs due to its high tensile strength and good wear resistance.
·Hydraulic Fittings: Suitable for producing hydraulic fittings, couplings, and connectors due to its machinability and dimensional stability.
·Bushings and Bearings: Used to manufacture bushings, bearings, and sleeves in automotive and machinery applications requiring high strength and wear resistance.
·Gears and Cams: Components such as gears, cams, and linkages in mechanical systems where high strength and wear resistance are critical.
Surface Treatment:
Surface treatments such as plating, painting, or black oxide coating can be applied to improve corrosion resistance and enhance appearance.

Quality Assurance:
Manufacturers ensure the quality of 1144 steel through chemical analysis, mechanical testing, dimensional inspection, and surface finish evaluation. Compliance with industry standards and specifications is essential to meet customer requirements.

Environmental Considerations:
1144 steel is recyclable and can be reused to produce new steel products, reducing the environmental impact associated with steel production.