SAE AISI 1020 Steel Properties: Comprehensive Overview of C1020 Carbon Steel Yield Strength and Equivalent Standards
ASTM SAE AISI 1020 Steel: A Benchmark in Carbon Alloys
AISI 1020 steel, also known as C1020, is renowned for its exceptional machinability and weldability. Available in both cold worked (cold rolled or cold drawn) conditions, it can be hot rolled or cold drawn, though it is primarily turned and polished or cold drawn. With its low carbon content, AISI 1020 steel resists induction and flame hardening, making it a versatile and commonly used plain carbon steel.
AISI SAE 1020 Steel Properties & Specifications: Your Guide to Material Excellence
The data sheet below details the SAE AISI 1020 steel properties, including comprehensive chemical composition, physical and mechanical characteristics.
Chemical Composition: Detailed Breakdown
Physical Properties: Essential Data
Melting Point: 1515 °C (2760 °F)
Density of 1020 Steel: 7.87 g/cm3 (0.0361 lbs/in3)
Notes: Evaluating Important Metrics
-6
/K = 10
-6
.K
-1
= (µm/m)/°C
Mechanical Properties of SAE AISI 1020 Mild Steel: Ensuring Structural Integrity
This data reveals that AISI SAE 1020 steel's mechanical properties encompass yield strength, tensile strength, elongation, section reduction, and hardness in various conditions.
Young's Modulus (Modulus of Elasticity) for SAE AISI 1020 Carbon Steel in as-received condition is 186 GPa (27×10
6
psi)
Machinability: Deconstructing Performance
AISI SAE 1020 carbon steel holds a machinability rating of 65, based on a 100% rating standard for 1212 steel.
SAE AISI 1020 Steel Heat Treatment: Shaping Excellence
Heat treatment processes for SAE AISI 1020 mild steel include normalizing, annealing, and austenitizing.
Normalizing of AISI 1020: Process & Parameters
Typical normalizing temperature for SAE AISI 1020 mild steel is 915 °C (1675 °F).
Annealing of AISI 1020: Techniques & Temperatures
Recommended temperature and cooling cycle for full annealing of small carbon steel forgings (size ≤ 3 in.):
Annealing temperature: 855-900 °C (1575-1650 °F); Cooling cycle: From 855 °C (1575 °F) to 700 °C (1290 °F) at a furnace cooling speed of 28 °C/h (50 °F/h). Brinell hardness: 111-149 HB.
Reheating (Austenitizing): Optimization for Hardening
Reheating (austenitizing) temperatures for SAE 1020 steel hardening are 760-790 °C (1400-1450 °F). Carburizing typically takes place at 900 to 925 °C (1650 to 1700 °F).
Case Hardening: Elevating Surface Strength
The surface hardening carburization temperature for 1020 carbon steel is 970-955 °C. This usually occurs in a mixed gas of methane and carrier gas. Hardening post-carburizing is often achieved by direct quenching from the carburizing temperature into water or brine.
Ideal Heat Treatment for SAE 1020 Case Hardening
- Carbon Temperature: Reach between 900-925 °C (1650-1700 °F), with cooling methods including water or caustic solutions for optimal results.
- Reheat Temperature: 790 °C (1450 °F), cooled effectively using water or a 3% sodium hydroxide solution.
- Carbonitriding Temperature: Maintain between 790-900 °C (1450-1650 °F), with oil being the preferred cooling medium to enhance metal properties.
- Temper Temperature: Between 120-205 °C (250-400 °F) for stress relief and enhanced resistance to cracking, though not strictly necessary.
Typical Forging Temperature Range
For AISI 1020 Mild Steel, the ideal forging temperature is 1290 °C (2350 °F).
Welding of AISI 1020 Carbon Steel
Recommended Preheat and Interpass Temperatures for AISI SAE C1020 Steel:
For thickness ≤50mm (2 in.), maintain a preheat and interpass temperature above -12 °C for low hydrogen applications, and 38 °C for other applications.
For thickness (t) 50< t ≤100, the preheat and interpass temperature should be 93 °C for low hydrogen applications, and 150 °C for other applications.
Postweld Heat Treatment is optional, with recommended temperatures ranging between 590-675 °C (1100-1250 °F).
Applications
ASTM AISI SAE 1020 steel offers numerous semi-finished products, including square, flat, and round steel bars, steel plates, and more. These can be utilized in manufacturing truck and automotive parts, agricultural equipment like axles, mechanical components, motor shafts, pump shafts, gears, cranes, brake wheels, and more. Additionally, they're often fashioned into steel channels, steel angles, I-beams, and H-beams.
AISI SAE ASTM 1020 Steel Equivalent Materials
SAE ASTM AISI 1020 carbon steel is equivalent to European standards (Germany DIN EN, British BSI, French NF), Japanese JIS, and Chinese GB standards.
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