Unveiling the Excellence of SAE AISI 1020 Steel: Properties, C1020 Carbon Steel Yield Strength, and Equivalents
Introducing ASTM SAE AISI 1020 Steel: Unmatched Quality and Performance
AISI 1020 steel, also recognized as C1020 steel, showcases remarkable versatility in its cold worked (cold rolled or cold drawn) state. Known for its excellent machinability and weldability, SAE AISI 1020 mild steel can be hot rolled or cold drawn, generally presented in turned and polished or cold drawn conditions. Its low carbon content grants it resistance to induction hardening or flame hardening.
AISI SAE 1020 Steel: Comprehensive Properties & Specifications
Below is the detailed data sheet for SAE AISI 1020 steel, highlighting its chemical composition, and physical and mechanical properties.
Chemical Composition: A Detailed Breakdown
Physical Properties: The Essentials
Impressive Melting Point: 1515 °C (2760 °F)
Defined Density of 1020 Steel: 7.87 g/cm3 (0.0361 lbs/in3)
Notes on Properties: 10
Thermal Expansion Coefficient: -6
/K = 10
Coefficient Value: -6
Unit: .K
Per °C: -1
Measurement: (µm/m)/°C
Mechanical Properties of SAE AISI 1020 Mild Steel: A Closer Look
The mechanical properties of AISI SAE 1020 steel include yield strength, tensile strength, elongation, section reduction, and hardness, as shown in various conditions below.
Young's Modulus of SAE AISI 1020 Carbon Steel (as-received condition): 186 GPa (27×10
Power: 6
psi)
Machinability: High Performance
The machinability rating of AISI SAE 1020 carbon steel stands at 65, based on a 100% machinability rating for 1212 steel.
Heat Treatment of SAE AISI 1020 Steel: An Overview
Heat treatment processes for SAE AISI 1020 mild steel include normalizing, annealing, and austenitizing, among others.
Normalizing Process for AISI 1020
Typical normalizing temperature for SAE AISI 1020 mild steel: 915 °C (1675 °F)
Annealing Process for AISI 1020
Full annealing temperature and cooling cycle for small carbon steel forgings (size ≤ 3 in.):
Recommended annealing temperature: 855-900 °C (1575-1650 °F). Cooling cycle: from 855 °C (1575 °F) to 700 °C (1290 °F). Furnace cooling speed: 28 °C/h (50 °F/h). Brinell hardness: 111-149 HB.
Reheating (Austenitizing) Process
Reheating (austenitizing) temperatures for hardening SAE 1020 steel: 760-790 °C (1400-1450 °F). Carburizing typically conducted at 900-925 °C (1650-1700 °F).
Case Hardening Process
Surface hardening carburization temperature for 1020 carbon steel: 970-955 °C. Typically performed in a methane and carrier gas mix. Hardening post-carburizing is usually achieved by direct quenching from the carburizing temperature into water or brine.
SAE 1020 Case Hardening: The Quintessential Heat Treatment Process
- Optimal Carbon Temperature: Maintain at 900-925 °C (1650-1700 °F), with cooling methods being either water or caustic solutions.
- Reheat Temperature Specifications: Set at 790 °C (1450 °F), cooled using water or a 3% sodium hydroxide solution for best results.
- Carbonitriding Excellence: Maintain temperatures between 790-900 °C (1450-1650 °F) and use oil for cooling.
- Temper Temperature Guidelines: Range from 120-205 °C (250-400 °F) for stress relief and enhanced crack resistance, although not mandatory.
Forging Temperature: The Standard for Excellence
Ideal Forging Temperature for AISI 1020 Mild Steel: A precise 1290 °C (2350 °F).
AISI 1020 Carbon Steel Welding: Best Practices
Recommended Preheat and Interpass Temperatures for AISI SAE C1020 Steel:
For ≤50mm (2 in.) thickness, set preheat and interpass above -12 °C for low hydrogen or at 38 °C for other than low hydrogen.
For 50< t ≤100mm thickness, set the temperature to 93 °C for low hydrogen and 150 °C for other than low hydrogen.
Postweld Heat Treatment: Optional, with temperatures between 590-675 °C (1100-1250 °F).
Applications: The Versatility of SAE 1020 Steel
ASTM AISI SAE 1020 steel is used to craft semi-finished products like square, flat, and round steel bars, as well as steel plates. These materials are essential in making truck, automotive, and agricultural equipment parts such as axles, mechanical parts, cold head bolts, motor and pump shafts, ratchets, light gears, gear drives, worm gears, spindles, seat brackets, crane-cable drums, and motor-brake wheels. Additionally, they are commonly fabricated into steel channels, angles, I-beams, and H-beams.
AISI SAE ASTM 1020 Steel: Equivalent Materials Across the Globe
SAE ASTM AISI 1020 carbon steel is comparable to European EN (Germany DIN EN, British BSI, French NF), Japanese JIS, and Chinese GB standards.
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