Top-Grade AISI 1020 Carbon Alloy Steel Flat Bar, Smooth Finish

• 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

SAE AISI 1020 Steel Properties: Immerse yourself in the intricate details of C1020 Carbon Steel. With a focus on yield strength and equivalent standards, this section highlights the robustness and unmatched reliability of this exemplary steel, making it a cornerstone in industrial applications.

ASTM SAE AISI 1020 Steel: Elevating the standards of quality and consistency, this distinguished steel grade stands as a benchmark, epitomizing precision and superior performance that engineers and manufacturers trust.

AISI 1020 steel, prominently known as C1020 steel, is celebrated for its incredible adaptability in its cold worked form, be it rolled or drawn. Known for its top-notch machinability and weldability, this mild carbon steel is readily available in turned, polished, or cold drawn variants. Its lower carbon concentration renders it less prone to induction or flame hardening, ensuring reliable and consistent performance across a multitude of applications, making it an ideal choice for diverse industries.

AISI SAE 1020 Steel: Comprehensive Properties & Specifications. Delve into an extensive exploration of its rich capabilities, offering a thorough understanding of this multifaceted steel’s potential in various applications.

Discover the exceptional SAE AISI 1020 steel properties with an all-encompassing data sheet that details its chemical composition, physical and mechanical properties. Gain a comprehensive understanding of this versatile material, tailored to meet the demands of modern engineering.

Chemical Composition: Explore the elemental blueprint of AISI 1020 steel, shedding light on its fundamental characteristics that contribute to its widespread acclaim in the industry.

	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: Delve into the intrinsic physical attributes that define AISI 1020 steel's performance, durability, and widespread usability in challenging environments.

Melting Point: AISI 1020 steel boasts a precise melting point of 1515 °C (2760 °F), underscoring its resilience and reliability under high-temperature conditions.
Density of AISI 1020 Steel: With a density of 7.87 g/cm3 (0.0361 lbs/in3), this remarkable material exhibits a robust structural profile, essential for demanding applications.

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: Delve into specific annotations and observations that provide deeper insights into the material properties.-6/K = 10, detailing the thermal expansion coefficient and its significance in industrial use.-6.K-1 = (µm/m)/°C, offering insights into the steel's thermal expansion characteristics.

Mechanical Properties of SAE AISI 1020 Mild Steel: A true testament to strength and versatility, this section explores the mechanical prowess of this renowned steel grade, suitable for a myriad of demanding applications.

The mechanical properties of AISI SAE 1020 steel, including its yield and tensile strength, elongation, section reduction, and hardness, underscore its adaptability and diverse application potential, making it a favorite among engineers.
SAE AISI 1020 Carbon Steel: Young's Modulus: Displaying a Young's modulus of 186 GPa (27×10^6 psi) in its as-received state, this steel assures robust and reliable performance under various stress conditions.6 psi), ensuring robust performance under stress and reinforcing its suitability for demanding 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: Experience exceptional performance in precision engineering and manufacturing, making it the material of choice for intricate designs.

AISI SAE 1020 Carbon Steel: With an impressive machinability rating of 65, based on a 100% benchmark for 1212 steel, it stands as a steadfast choice in manufacturing processes, acclaimed for its precision and reliability.

SAE AISI 1020 Steel Heat Treatment: Enhance the steel's mechanical properties through advanced treatment processes, such as normalization, annealing, and austenitizing, to achieve peak performance and longevity.

The heat treatment of SAE AISI 1020 mild steel encompasses critical processes like normalizing, annealing, and austenitizing, ensuring the material achieves optimal performance and enduring durability.

Normalizing AISI 1020: Achieve uniform grain size and superior mechanical properties through precise normalizing techniques, ensuring enhanced material performance and reliability.

The typical normalizing temperature for SAE AISI 1020 mild steel is a precise 915 °C (1675 °F), ensuring thorough structural refinement and improved mechanical attributes.

Annealing AISI 1020: A specialized process designed to relieve stress while enhancing ductility and toughness, crucial for demanding engineering applications.

For small carbon steel forgings (≤ 3 in.), recommended full annealing involves specific temperature and cooling cycles, ensuring superior material properties and reliability in critical applications.
Annealing Process: Follow a meticulous annealing protocol at temperatures ranging from 855-900 °C (1575-1650 °F), carefully monitoring the cooling cycle from 855 °C (1575 °F) to 700 °C (1290 °F) at a rate of 28 °C/h (50 °F/h). This precise control ensures a desirable Brinell hardness of 111-149 HB, resulting in a product that is both resilient and reliable.

Reheating (Austenitizing): Elevate the hardening process with unparalleled precision in austenitizing temperature management, optimizing the steel's performance and strength.

Reheating (Austenitizing) for AISI 1020 steel: Execute the hardening phase at a controlled temperature of 760-790 °C (1400-1450 °F), coupled with an advanced carburizing process at 900 to 925 °C (1650 to 1700 °F). This method guarantees superior case hardening, enhancing the surface characteristics for optimal performance.

Case Hardening: Unlock enhanced surface durability and wear resistance with cutting-edge case hardening techniques, ensuring your product excels under demanding conditions.

Achieve unparalleled surface hardening for 1020 carbon steel through an expert carburization process at a meticulous temperature range of 970-955°C, utilizing an innovative mixture of methane and carrier gases. This is followed by a direct quench in water or brine, securing exceptional hardening outcomes.

Discover the quintessential heat treatment for SAE 1020 case hardening, a sophisticated process that significantly boosts durability and strength, making it ideal for demanding applications.

• Meticulously maintain carbon temperature between 900-925°C (1650-1700°F), complimented by an exacting cooling method using either water or caustic solutions to optimize the hardening process, ensuring superior results.
• Set the reheat temperature at a precise 790°C (1450°F), followed by strategic cooling in water or a 3% sodium hydroxide solution, thereby enhancing the material's durability and integrity.
• During the carbonitriding process, maintain temperatures between 790-900°C (1450-1650°F), effectively utilizing oil as the cooling medium to ensure a finish that meets the highest quality standards.
• Tempering takes place within a critical temperature range of 120-205°C (250-400°F). This essential process relieves stress and significantly boosts crack resistance, though it may not always be essential, depending on specific requirements.

Typical Forging Temperature

For AISI 1020 mild steel, a typical forging temperature of a substantial 1290°C (2350°F) is used, ensuring the material achieves optimal malleability and formability for superior manufacturing outcomes.

AISI 1020 Carbon Steel Welding

For successful welding of AISI SAE C1020 steel, it is crucial to adhere to these recommended preheat and interpass temperatures to ensure integrity and strength in the welding process.
When welding thicknesses ≤50mm (2 in.), maintain a preheat and interpass temperature above -12°C for low hydrogen applications and 38°C for other welding types to ensure optimal results.
For thicknesses ranging from 50mm to 100mm, the ideal preheat and interpass temperature is 93°C for low hydrogen, and 150°C for other welding processes, ensuring superior weld quality.
Although postweld heat treatment is optional, applying it within a recommended temperature range of 590-675°C (1100-1250°F) can significantly enhance the material properties.

Application

ASTM AISI SAE 1020 steel showcases impressive versatility, being transformed into a variety of semi-finished products such as square, flat, and round steel bars, as well as steel plates. It stands as a cornerstone in the manufacture of a wide spectrum of components for trucks, automotive, and agricultural equipment. These include axles, mechanical parts, cold head bolts, motor shafts, and more. Additionally, this steel is frequently molded into structural forms like steel channels, angles, I-beams, and H-beams, offering robust solutions across multiple industries.

AISI SAE ASTM 1020 Steel Equivalent Material

The SAE ASTM AISI 1020 carbon steel is harmonized with European EN standards—including Germany DIN EN, British BSI, French NF—along with Japanese JIS and Chinese GB standards, guaranteeing its applicability and uniformity in global markets.

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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