AISI 1020 Alloy Steel Round Bar, Smooth Finish and Durable

• Customization: Available
• Type: Carbon Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Model NO.: carbon steel
• Technique: Forged
• Shape: Bar
• Surface Treatment: Polished
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Die Steel Bar
• Transport Package: N/M
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7228400000
• Production Capacity: 5000ton/Month

Product Description

Unveiling the exceptional properties of SAE AISI 1020 Steel: Explore the resilient nature of C1020 Carbon Steel, known for its remarkable yield strength. Discover its equivalents and understand why it stands tall in the realm of carbon steels.

ASTM SAE AISI 1020 Steel: The Standard of Excellence in Carbon Steel Grade.

Embrace the versatility of AISI 1020 steel, also recognized as C1020 steel in its cold worked form, whether cold rolled or cold drawn. Renowned for its superior machinability and weldability, this plain carbon steel is among the most utilized, offering the option to be hot rolled or cold drawn. Generally found in a turned and polished or cold drawn state, its low carbon content renders it resistant to methods like induction or flame hardening.

AISI SAE 1020 Steel Properties & Specification: A Comprehensive Guide to Understanding Its Unique Features.

Discover the comprehensive data sheet detailing SAE AISI 1020 steel properties, including its intricate chemical composition and robust physical and mechanical properties.

Chemical Composition: Understanding the Fundamental Elements of 1020 Steel.

	AISI SAE 1020 Steel Chemical Composition (%)
AISI	C	Mn	P (≤)	S (≤)
1020	0.18-0.23	0.30-0.60	0.040	0.050

Physical Properties: The Building Blocks of 1020 Steel's Performance.

Melting point: A precise 1515 °C (2760 °F), reflecting the resilience of this alloy.
Density of 1020 steel: Precisely 7.87 g/cm3 (0.0361 lbs/in3), showcasing its compact and solid nature.

Material 1020 thermal conductivity
Value (W/m·K)	Temperature, °C (°F)
51.9	0 (32)
51.0	100 (212)
48.9	200 (392)

Specific Heat
Value (J/Kg·K)	Temperature, °C (°F)
486	50-100 (122-212)
519	150-200 (302-392)
599	350-400 (662-752)

Electrical Resistivity of 1020 Carbon Steel
Value (μΩ·m)	Temperature, °C (°F)
0.159	0 (32)
0.219	100 (212)
0.292	200 (392)

Coefficients of linear thermal expansion
Value (10-6/K)	Temperature, °C (°F)	Treatment or condition
11.7	20-100 (68-212)	Annealed
12.1	20-200 (68-392)
12.8	20-300 (68-572)
13.4	20-400 (68-752)
13.9	20-500 (68-932)
14.4	20-600 (68-1112)
14.8	20-700 (68-1292)

Notes on Thermal Expansion Coefficients: Essential Insights.-6/K = 10-6.K-1 = (µm/m)/°C

Mechanical Properties of SAE AISI 1020 Mild Steel: Unraveling the Strength and Durability Attributes.

The following data provides an in-depth look into the mechanical properties of AISI SAE 1020 steel, including its yield strength, tensile strength, elongation, section reduction, and hardness under various conditions.
SAE AISI 1020 carbon steel Young's modulus, or modulus of elasticity, stands at an impressive 186 GPa (27×106 psi), ensuring dependability in structural applications.

AISI 1020 steel mechanical properties in heat-treated or cold-worked conditions
AISI (UNS)	Tensile strength, MPa (ksi), ≥	Yield strength, MPa (ksi), ≥	Elongation in 50 mm, %, ≥	Reduction in area, %, ≥	Hardness (HB)	Processing, condition or treatment	Sample Size, mm (in.)
1020 (G10200)	380 (55)	205 (30)	25	50	111	Hot rolled	19-31.8 mm (0.75-1.25 in.)
	420 (61)	350 (51)	15	41	121	Cold drawn

Mechanical properties in the hot-rolled, normalized, and annealed condition
AISI	Tensile strength, MPa (ksi), ≥	Yield strength, MPa (ksi), ≥	Elongation in 50 mm, %, ≥	Reduction in area, %, ≥	Hardness (HB)	Processing, condition or treatment	Austenitizing temperature, °C (°F)	Quenching agent	Izod impact strength, J, (ft·lbf)	Sample Size
1020	448 (65)	331 (48)	36	59	143	As-rolled	-	Oil	87 (64)	12.8 mm (0.505 in.) machined from 25.4 mm (1 in.) rounds.
	441 (64)	346.5 (50.3)	35.8	68	131	Normalized	870 (1600)	Oil	118 (87)
	394.7 (57.3)	295 (43)	36.5	66	111	Annealed	870 (1600)	Oil	123 (91)

		Cyclic fatigue properties
UNS	Grade	Cyclic strength coefficient, MPa (ksi)	Fatigue strength coefficient, MPa (ksi)	Fatigue strength exponent	Fatigue ductility coefficient	Fatigue ductility exponent	Hardness (HB)
G10200	SAE 1020 steel	1205 (175)	850 (123)	-0.12	0.44	-0.51	108

Machinability Insights: Mastering the Art of Machining with 1020 Steel.

AISI SAE 1020 carbon steel boasts a machinability rating of 65, benchmarked against a full machinability rating of 100% for 1212 steel.

SAE AISI 1020 Steel Heat Treatment: Techniques to Enhance Performance and Strength.

Discover the processes involved in heat treating SAE AISI 1020 mild steel, including critical methods like normalizing, annealing, and austenitizing.

Normalizing of AISI 1020: Achieving Optimal Microstructure and Mechanical Properties.

The typical normalizing temperature for SAE AISI 1020 mild steel is precisely 915 °C (1675 °F).

Annealing of AISI 1020: Detailed Guidelines to Achieve Desired Softness and Ductility.

Recommendations for annealing small carbon steel forgings (size ≤ 3 in.) include:
The annealing temperature is set between 855-900 °C (1575-1650 °F). The cooling cycle transitions from 855 °C (1575 °F) to 700 °C (1290 °F), with a controlled furnace cooling rate of 28 °C/h (50 °F/h), resulting in a Brinell hardness rating of 111-149 HB.

Reheating (Austenitizing): Optimizing Steel Hardening Techniques.

Reheating (austenitizing) temperatures for hardening SAE 1020 steel range between 760-790 °C (1400-1450 °F). Carburizing is commonly conducted at temperatures of 900 to 925 °C (1650 to 1700 °F).

Case Hardening: Surface Enhancement Techniques for SAE 1020 Steel.

Surface hardening carburization of 1020 carbon steel occurs at temperatures of 970-955 °C, predominantly within a methane and carrier gas mixture. Post-carburization hardening is typically achieved through direct quenching from the carburization temperature into water or brine.

SAE 1020 Case Hardening: This steel undergoes a specific heat treatment process designed to enhance surface hardness while maintaining a ductile core, perfect for components needing exceptional resilience and toughness.

• Carbon Temperature: Maintain it between 900-925 °C (1650-1700 °F) and choose water or caustic solutions as your cooling methods to ensure optimal hardness and strength.
• Reheat Temperature: Set at a consistent 790 °C (1450 °F), with water or a 3% sodium hydroxide solution as your cooling agents to reinforce the steel's durability and maintain structural integrity.
• Carbonitriding Excellence: Conduct this treatment at 790-900 °C (1450-1650 °F) and cool in oil to impart a superior, wear-resistant surface finish on your alloy steel.
• Temper Temperature: Operate between 120-205 °C (250-400 °F) to relieve stresses and enhance resistance to cracking, a crucial step for components demanding high reliability, though not always essential.

Forging Prowess with AISI 1020 Mild Steel

Forging Temperature: Achieve optimal workability at 1290 °C (2350 °F), ensuring your steel is malleable yet robust enough to withstand demanding applications.

Welding Techniques for AISI 1020 Steel

Preheat and Interpass Temperatures: Follow these guidelines for AISI SAE C1020 steel to achieve seamless welds.
For thickness ≤50mm (2 in.): Maintain preheat and interpass temperatures above -12 °C for low hydrogen processes, ensuring thermal stability, with 38 °C for other methods.
For thickness (t) 50< t ≤100: Set preheat and interpass temperatures at 93 °C for low hydrogen, and 150 °C for other methods to guarantee excellent welding quality.
Optional Postweld Heat Treatment: Consider applying between 590-675 °C (1100-1250 °F) to provide additional structural refinement and stress relief, enhancing performance.

Versatile Applications of AISI 1020 Steel

AISI 1020 steel transforms into versatile semi-finished products such as square, flat, and round steel bars, steel plates, and more, perfect for manufacturing truck, automotive, and agricultural equipment parts. From axles and mechanical components to cold head bolts and gear drives, this steel's adaptability shines. It's also crafted into structural elements like steel channels, angles, I-beams, and H-beams for diverse construction projects.

Global Equivalence of AISI 1020 Steel

AISI 1020 carbon steel stands as an equivalent across major international standards, including European EN (Germany DIN EN, British BSI, French NF…), Japanese JIS, and Chinese GB, ensuring universal applicability and compliance.

AISI SAE ASTM 1020 steel equivalent material
US				Germany		China		Japan		ISO
Standard	AISI (UNS)	Standard	Grade	Standard	Grade (Material Number)	Standard	Grade	Standard	Grade	Standard	Grade
AISI SAE; ASTM A29/A29M	1020 (G10200)	AMS	5032D; 5045E; 5046	DIN EN 10083-2; DIN EN 10250-2	C22E (1.1151); C22 (1.0402)	GB/T 699	20 steel	JIS G4051	S20C

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