Premium Carbon Alloy Steel Flat Bar, AISI 1020 Specifications

• 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: Dive into the detailed attributes of C1020 Carbon Steel, including its yield strength and equivalents, showcasing its robustness and reliability.

ASTM SAE AISI 1020 Steel: A benchmark in quality and consistency, this steel grade embodies precision and superior performance.

AISI 1020 steel, also recognized as C1020 steel, offers exceptional versatility in its cold worked form, whether rolled or drawn. Celebrated for its excellent machinability and weldability, this mild carbon steel is typically available in turned, polished, or cold drawn states. Its low carbon content makes it less susceptible to induction or flame hardening, ensuring dependable performance across various applications.

AISI SAE 1020 Steel: Comprehensive Properties & Specifications, providing a thorough insight into its multifaceted capabilities.

Discover the SAE AISI 1020 steel properties with an in-depth data sheet detailing its chemical composition, alongside its physical and mechanical properties, providing a complete understanding of this versatile material.

Chemical Composition: Unveil the elemental makeup of AISI 1020 steel, highlighting its foundational characteristics.

	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: Explore the intrinsic physical attributes that define AISI 1020 steel's performance and usability.

Melting Point: AISI 1020 steel melts at a precise 1515 °C (2760 °F), ensuring high-temperature resilience.
Density of AISI 1020 Steel: With a density of 7.87 g/cm3 (0.0361 lbs/in3), this material exhibits a robust structural profile.

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: A testament to its strength and adaptability, this section delves into the mechanical prowess of this renowned steel grade.

The mechanical properties of AISI SAE 1020 steel, including yield and tensile strength, elongation, section reduction, and hardness, highlight its versatility and application diversity.
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 robust performance under stress.

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: Exceptional performance in precision engineering and manufacturing.

AISI SAE 1020 Carbon Steel: With a machinability rating of 65, based on a 100% benchmark for 1212 steel, it stands as a reliable choice for manufacturing processes.

SAE AISI 1020 Steel Heat Treatment: Enhance the mechanical properties through advanced treatment processes, including normalization, annealing, and austenitizing.

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

Normalizing AISI 1020: Achieve uniform grain size and enhanced mechanical properties through precise normalizing techniques.

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

Annealing AISI 1020: A process tailored for relieving stress and improving ductility and toughness.

For small carbon steel forgings (≤ 3 in.), recommended full annealing involves specific temperature and cooling cycles, ensuring enhanced material properties.
Annealing Process: Conducted at 855-900 °C (1575-1650 °F), with a controlled cooling cycle from 855 °C (1575 °F) to 700 °C (1290 °F) at 28 °C/h (50 °F/h), achieving a Brinell hardness of 111-149 HB.

Reheating (Austenitizing): Optimize the hardening process through precise austenitizing temperature control.

Reheating (Austenitizing) for hardening AISI 1020 steel is conducted at 760-790 °C (1400-1450 °F), complemented by carburizing at 900 to 925 °C (1650 to 1700 °F), ensuring superior case hardening results.

Case Hardening: Enhance surface durability and wear resistance through expert case hardening techniques.

The robust surface hardening process of the 1020 carbon steel is achieved through carburization at a precise temperature range of 970-955°C. This is expertly carried out in an innovative blend of methane and carrier gases. Following carburization, the steel is directly quenched into water or brine, ensuring exceptional hardening results.

Introducing the typical heat treatment for SAE 1020 case hardening, a process that enhances durability and strength.

• The carbon temperature is meticulously maintained between 900-925°C (1650-1700°F), with a precise cooling method using water or caustic solutions to optimize the hardening process.
• The reheat temperature is set at 790°C (1450°F), with cooling conducted in water or a 3% sodium hydroxide solution, further enhancing the material's robustness.
• During carbonitriding, temperatures range from 790-900°C (1450-1650°F), employing oil as the cooling medium to ensure a high-quality finish.
• Tempering occurs at temperatures between 120-205°C (250-400°F), which is essential for stress relief and significantly improves crack resistance, though not always obligatory.

Typical Forging Temperature

For AISI 1020 mild steel, the typical forging temperature is a substantial 1290°C (2350°F), ensuring optimal malleability and formability.

AISI 1020 Carbon Steel Welding

For successful welding of AISI SAE C1020 steel, adhere to these recommended preheat and interpass temperatures.
For thicknesses ≤50mm (2 in.), maintain a preheat and interpass temperature above -12°C for low hydrogen applications, and 38°C for other welding types.
For thicknesses between 50mm and 100mm, the ideal preheat and interpass temperature is 93°C for low hydrogen, and 150°C for other welding processes.
Postweld heat treatment is optional, with a recommended temperature range of 590-675°C (1100-1250°F) to enhance material properties.

Application

ASTM AISI SAE 1020 steel is versatile, forming numerous semi-finished products such as square, flat, and round steel bars, as well as steel plates. It is integral in manufacturing a wide array of components for trucks, automotive, and agricultural equipment, including axles, mechanical parts, cold head bolts, motor shafts, and more. Furthermore, this steel is commonly crafted into structural forms like steel channels, angles, I-beams, and H-beams.

AISI SAE ASTM 1020 Steel Equivalent Material

The SAE ASTM AISI 1020 carbon steel aligns with European EN standards (including Germany DIN EN, British BSI, French NF), Japanese JIS, and Chinese GB standards, ensuring global applicability and uniformity.

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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