Discover the impressive properties of SAE AISI 1020 Carbon Steel, renowned for its yield strength and equivalency with C1020 Carbon Steel. Learn how this versatile material stands out in the industry.
ASTM SAE AISI 1020 Steel: A Benchmark in Quality and Performance
AISI 1020 steel, also known as C1020 steel in its cold worked forms (either cold rolled or cold drawn), is one of the most widely used plain carbon steels. It boasts excellent machinability and weldability. While it can be hot rolled or cold drawn, it is typically found in turned and polished or cold drawn conditions. Its low carbon content makes it resistant to induction hardening or flame hardening, ensuring reliable performance across applications.
AISI SAE 1020 Steel: Properties & Specifications Unveiled
Detailed below are the comprehensive properties of SAE AISI 1020 steel, including its chemical composition, physical, and mechanical properties.
Chemical Composition
Physical Properties
Melting Point: 1515 °C (2760 °F)
Density: 7.87 g/cm³ (0.0361 lbs/in³)
Thermal Expansion Coefficient: 10 × 10/K
Thermal Conductivity: 51.9 W/m·K
/K = 10
-6
.K
-1
= (µm/m)/°C
Mechanical Properties of SAE AISI 1020 Mild Steel
The mechanical properties of AISI SAE 1020 steel include yield strength, tensile strength, elongation, section reduction, and hardness in various conditions. These attributes make it a dependable choice for numerous applications.
Young's Modulus (Modulus of Elasticity) for SAE AISI 1020 Carbon Steel in the as-received condition: 186 GPa (27×10 psi).
6
psi).
Machinability
AISI SAE 1020 carbon steel offers a machinability rating of 65, based on a standard machinability rating of 100% for 1212 steel, ensuring efficient and effective manufacturing processes.
SAE AISI 1020 Steel: Heat Treatment Techniques
Heat treatment processes for SAE AISI 1020 mild steel include normalizing, annealing, austenitizing, and more, ensuring the material meets diverse industrial requirements.
Normalizing of AISI 1020
The typical normalizing temperature for SAE AISI 1020 mild steel is 915 °C (1675 °F), optimizing its performance characteristics.
Annealing of AISI 1020
Recommended annealing temperature for small carbon steel forgings (size ≤ 3 in.): 855-900 °C (1575-1650 °F). Cooling cycle: from 855 °C (1575 °F) to 700 °C (1290 °F), with a furnace cooling speed of 28 °C/h (50 °F/h). Resulting Brinell hardness: 111-149 HB.
Annealing temperature: 855-900 °C (1575-1650 °F), cooling cycle: from 855 °C (1575 °F) to 700 °C (1290 °F), with a furnace cooling speed of 28 °C/h (50 °F/h), yielding a Brinell hardness of 111-149 HB.
Reheating (Austenitizing)
Reheating (austenitizing) temperatures for hardening of SAE 1020 steel range from 760-790 °C (1400-1450 °F). Carburizing typically occurs at 900 to 925 °C (1650 to 1700 °F).
Case Hardening
The carburization surface hardening temperature for 1020 carbon steel ranges from 970-955 °C. This process is often conducted in a mixed gas of methane and carrier gas. Hardening after carburizing is typically achieved by direct quenching from the carburizing temperature into water or brine.
Typical Heat Treatment for SAE 1020 Case Hardening
- Carbon Temperature: 900-925 °C (1650-1700 °F). Cooling Method: Water or Caustic.
- Reheat Temperature: 790 °C (1450 °F). Cooling Method: Water or 3% Sodium Hydroxide.
- Carbonitriding Temperature: 790-900 °C (1450-1650 °F). Cooling Method: Oil.
- Temper Temperature: 120-205 °C (250-400 °F). Ideal for stress relief and improving resistance to cracking (optional).
Typical Forging Temperature
The Typical Forging Temperature for AISI 1020 Mild Steel is around 1290 °C (2350 °F).
AISI 1020 Carbon Steel Welding
Recommended Preheat and Interpass Temperatures for AISI SAE C1020 Steel:
For thickness ≤50mm (2 in.): Above -12 °C for low hydrogen; 38 °C for other than low hydrogen.
For thickness 50< t ≤100mm: 93 °C for low hydrogen; 150 °C for other than low hydrogen.
Postweld Heat Treatment is optional. Temperature: 590-675 °C (1100-1250 °F).
Application
ASTM AISI SAE 1020 steel offers a variety of semi-finished products, including square, flat, and round steel bars, and steel plates. These are used to manufacture truck, automotive, and agricultural equipment parts like axles, mechanical parts, cold head bolts, motor shafts, pump shafts, ratchets, light gears, gear drives, worm gears, spindles, seat brackets, crane-cable drums, and motor-brake wheels. Additionally, it's commonly formed into steel channels, steel angles, I-beams, and H-beams.
AISI SAE ASTM 1020 Steel Equivalent Material
SAE ASTM AISI 1020 carbon steel is equivalent to European EN (Germany DIN EN, British BSI, French NF…), Japanese JIS, and Chinese GB standards.
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