Detailed SAE AISI 1020 Steel Properties: Unveiling C1020 Carbon Steel's Yield Strength and Equivalents
Explore the Robust ASTM SAE AISI 1020 Steel
Discover the Versatile AISI 1020 Steel, also known as C1020 steel, renowned for its excellent machinability and weldability in its cold worked state (cold rolled or cold drawn). This popular plain carbon steel can be hot rolled or cold drawn, typically found in turned and polished or cold drawn conditions. Due to its low carbon content, it resists induction and flame hardening, making it a reliable choice for various applications.
Comprehensive Guide to AISI SAE 1020 Steel Properties & Specifications
The data sheet provided below meticulously details the properties of SAE AISI 1020 steel, including its chemical composition, physical and mechanical characteristics.
In-Depth Chemical Composition Analysis
Thorough Examination of Physical Properties
Melting Point: Remarkable 1515 °C (2760 °F)
Density Profile of 1020 Steel: 7.87 g/cm³ (0.0361 lbs/in³)
Additional Notes: 10
-6
/K = 10
-6
.K
-1
= (µm/m)/°C
Mechanical Properties of SAE AISI 1020 Mild Steel
The subsequent data illustrates the mechanical properties of AISI SAE 1020 steel, including its yield strength, tensile strength, elongation, section reduction, and hardness across various conditions.
Young's Modulus (Modulus of Elasticity) of SAE AISI 1020 Carbon Steel in As-Received Condition: 186 GPa (27×10
6
psi).
Machinability
SAE AISI 1020 carbon steel boasts a machinability rating of 65, with 1212 steel set as the 100% benchmark.
SAE AISI 1020 Steel Heat Treatment
Comprehensive overview of heat treatment processes for SAE AISI 1020 mild steel, including normalizing, annealing, austenitizing, etc.
Normalizing SAE AISI 1020
The typical temperature for normalizing SAE AISI 1020 mild steel is precisely 915 °C (1675 °F).
Annealing SAE AISI 1020
Recommended temperature and cooling cycle for fully annealing small carbon steel forgings (size ≤ 3 in.):
Temperature: 855-900 °C (1575-1650 °F), Cooling Cycle: from 855 °C (1575 °F) to 700 °C (1290 °F) with a furnace cooling rate of 28 °C/h (50 °F/h). Brinell Hardness: 111-149 HB.
Reheating (Austenitizing)
Reheating (austenitizing) temperatures for hardening SAE 1020 steel span 760-790 °C (1400-1450 °F). Carburizing is typically conducted at 900 to 925 °C (1650 to 1700 °F).
Case Hardening
The surface hardening carburization temperature for 1020 carbon steel ranges between 970-955 °C, frequently performed in a methane and carrier gas mixture. Hardening post-carburizing is typically achieved by direct quenching from the carburizing temperature into water or brine.
Typical Heat Treatment for SAE 1020 Case Hardening
- Carburizing Temperature: Maintain between 900-925 °C (1650-1700 °F), with cooling techniques including water quenching or using caustic solutions.
- Reheat Treatment: When reheating, ensure the temperature reaches 790 °C (1450 °F), followed by cooling with water or a 3% sodium hydroxide solution.
- Carbonitriding Process: Conduct carbonitriding at temperatures between 790-900 °C (1450-1650 °F) and use oil for cooling to achieve optimal results.
- Tempering Guidelines: Temper at 120-205 °C (250-400 °F) to relieve stress and enhance *** resistance. Note: This step is not mandatory but highly recommended for improved durability.
Typical Forging Temperature
Forging Insights: For AISI 1020 mild steel, the forging temperature should be ideally set at 1290 °C (2350 °F) for best material integrity.
AISI 1020 Carbon Steel Welding
Preheat & Interpass Recommendations: For AISI SAE C1020 steel,
For material thickness ≤50mm (2 in.): Maintain preheat and interpass temperature above -12 °C for low hydrogen applications, and 38 °C for non-low hydrogen scenarios.
For material thickness between 50< t ≤100mm: Set preheat and interpass temperature at 93 °C for low hydrogen conditions, and 150 °C for other applications.
Postweld Heat Treatment: Optional postweld heat treatment can be applied at a temperature range of 590-675 °C (1100-1250 °F) for enhanced performance.
Applications
Versatile Uses: ASTM AISI SAE 1020 steel is available in various semi-finished forms including square, flat, and round steel bars, as well as steel plates. These can be fabricated into truck and automotive parts, agricultural equipment, axles, mechanical components, cold head bolts, motor and pump shafts, ratchets, light gears, gear drives, worm gears, spindles, seat brackets, crane-cable drums, motor-brake wheels, and more. Additionally, it can be shaped into steel channels, angles, I-beams, and H-beams.
AISI SAE ASTM 1020 Steel Equivalent Materials
Global Standard Equivalents: SAE ASTM AISI 1020 carbon steel corresponds to various international standards including European EN (Germany DIN EN, British BSI, French NF), Japanese JIS, and Chinese GB specifications.
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