Premium Carbon Alloy Steel Flat Bar, AISI 1020 Specifications, 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: Delve deep into the nuanced attributes of C1020 Carbon Steel. Revel in its formidable yield strength and industry-acknowledged equivalents, underscoring its unparalleled robustness and unwavering reliability, setting it apart as a superior choice.

ASTM SAE AISI 1020 Steel: Esteemed as a hallmark of unrivaled quality and unwavering consistency, this esteemed steel grade exemplifies precision engineering and superior performance, making it a cornerstone of excellence in the industry.

AISI 1020 steel, esteemed in the industry as C1020 steel, embodies unmatched versatility in its cold worked form. Whether expertly rolled or skillfully drawn, this mild carbon steel is celebrated for its exceptional machinability and weldability. Typically available in turned, polished, or cold drawn states, its low carbon content makes it resistant to induction or flame hardening, ensuring dependable performance across diverse applications.

AISI SAE 1020 Steel: Explore the comprehensive properties and detailed specifications of this steel, offering valuable insights into its multifaceted capabilities and vast potential in various applications.

Discover the intricacies of SAE AISI 1020 steel properties with a meticulously detailed data sheet. Uncover its chemical composition alongside its physical and mechanical properties, providing a thorough understanding of this versatile and widely applicable material.

Chemical Composition: Unveil the elemental makeup of AISI 1020 steel to gain insight into its foundational characteristics that define its diverse applications.

	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: Dive into the intrinsic physical attributes that define AISI 1020 steel's impressive performance and usability, offering a comprehensive understanding of this material's core strengths.

Melting Point: AISI 1020 steel, known for its high-temperature resilience, boasts a precise melting point of 1515 °C (2760 °F), ensuring robustness in demanding environments.
Density of AISI 1020 Steel: With a robust structural profile, this material presents a density of 7.87 g/cm3 (0.0361 lbs/in3), exemplifying its reliability and strength.

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: 10-6/K = 10-6.K-1 = (µm/m)/°C

Mechanical Properties of SAE AISI 1020 Mild Steel: This section stands as a testament to the strength and adaptability of this renowned steel grade, delving into its mechanical prowess and reliability.

The mechanical properties of AISI SAE 1020 steel, including its yield and tensile strength, elongation, section reduction, and hardness, underscore its versatility and the diversity of its applications, making it a reliable choice across industries.
SAE AISI 1020 Carbon Steel: Young's Modulus: In its as-received state, this steel exhibits a Young's modulus of 186 GPa (27×106 psi), ensuring its robust performance under stress and highlighting its reliability in demanding conditions.

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: Renowned for its exceptional performance, this steel grade excels in precision engineering and manufacturing, offering unmatched reliability.

AISI SAE 1020 Carbon Steel: With a commendable machinability rating of 65, based on a 100% benchmark for 1212 steel, this material stands as a reliable choice for various manufacturing processes, offering precision and efficiency.

SAE AISI 1020 Steel Heat Treatment: Elevate the mechanical properties through advanced treatment processes such as normalization, annealing, and austenitizing, ensuring unmatched performance and durability.

The heat treatment of SAE AISI 1020 mild steel involves processes like normalizing, annealing, and austenitizing, each meticulously designed to ensure optimal performance and long-lasting durability.

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

The typical normalizing temperature for SAE AISI 1020 mild steel is set at a precise 915 °C (1675 °F), ensuring optimal structural refinement and enhanced performance.

Annealing AISI 1020: This tailored process is designed for relieving stress, thus improving ductility and toughness, ensuring the material's readiness for demanding applications.

For small carbon steel forgings (≤ 3 in.), recommended full annealing involves specific temperature and cooling cycles, ensuring enhanced material properties and optimal performance.
Annealing Process: Our state-of-the-art annealing process expertly manages a temperature range of 855-900 °C (1575-1650 °F), employing a meticulously controlled cooling cycle from 855 °C (1575 °F) to 700 °C (1290 °F) at a precise 28 °C/h (50 °F/h). This results in an optimal Brinell hardness of 111-149 HB, ensuring superior performance and quality.

Reheating (Austenitizing): Elevate the hardening process with precision austenitizing temperature control, ensuring the perfect balance of hardness and toughness in our top-grade steel.

Reheating (Austenitizing) for hardening AISI 1020 steel is conducted with precision at temperatures of 760-790 °C (1400-1450 °F). This process is expertly complemented by carburizing at 900 to 925 °C (1650 to 1700 °F), delivering superior case hardening results that set a new standard for durability and strength.

Case Hardening: Boost surface longevity and enhance wear resistance with our advanced case hardening techniques, designed to provide unmatched durability and reliability.

Our robust surface hardening process for 1020 carbon steel is meticulously achieved through carburization within a precise temperature range of 970-955°C. Using an innovative blend of methane and carrier gases, the process culminates in direct quenching into water or brine, resulting in exceptional hardening and unparalleled surface quality.

Introducing the typical heat treatment for SAE 1020 case hardening—a sophisticated process that significantly enhances both durability and structural strength, making it ideal for demanding applications.

• Our carbon temperature control is maintained meticulously between 900-925°C (1650-1700°F). This is coupled with a precise cooling method using water or caustic solutions, optimizing the hardening process to achieve superior material performance.
• The reheat temperature is expertly set at 790°C (1450°F), with cooling conducted in water or a 3% sodium hydroxide solution. This further enhances the material's robustness, ensuring lasting performance and reliability.
• During our specialized carbonitriding process, temperatures are carefully managed between 790-900°C (1450-1650°F). Utilizing oil as the cooling medium, we ensure a premium high-quality finish that stands the test of time.
• Tempering occurs seamlessly at temperatures between 120-205°C (250-400°F), essential for effective stress relief. This process significantly enhances crack resistance, although it is not always obligatory, depending on application needs.

Typical Forging Temperature

For AISI 1020 mild steel, we achieve the ideal forging conditions at a substantial temperature of 1290°C (2350°F), ensuring unmatched malleability and formability for all your manufacturing needs.

AISI 1020 Carbon Steel Welding

For exemplary welding of AISI SAE C1020 steel, it is crucial to follow these recommended preheat and interpass temperatures to secure lasting joint integrity and strength.
For steel thicknesses ≤50mm (2 in.), maintain a preheat and interpass temperature above -12°C for low hydrogen applications, and 38°C for other welding types, ensuring optimal weld quality.
For thicknesses ranging between 50mm and 100mm, the preferred preheat and interpass temperature is 93°C for low hydrogen applications, and 150°C for other welding processes, ensuring a strong, durable weld.
Postweld heat treatment is optional, but when selected, it is recommended to maintain a temperature range of 590-675°C (1100-1250°F) to significantly enhance the material properties and weld quality.

Application

ASTM AISI SAE 1020 steel showcases remarkable versatility, forming a diverse array of semi-finished products such as square, flat, and round steel bars, as well as steel plates. This steel plays a pivotal role in the manufacture of a wide array of components for trucks, automotive, and agricultural equipment, including critical parts like axles, mechanical components, cold head bolts, and motor shafts. Moreover, it is commonly styled into structural forms like steel channels, angles, I-beams, and H-beams, making it indispensable in construction and manufacturing industries.

AISI SAE ASTM 1020 Steel Equivalent Material

The SAE ASTM AISI 1020 carbon steel boasts global applicability, aligning with prestigious European EN standards—including Germany DIN EN, British BSI, French NF—as well as Japanese JIS and Chinese GB standards, ensuring uniformity and reliability across international 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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