Quality AISI 1020 Carbon Alloy Steel Flat Bar, Smooth Finish Options

• 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 deeply into the comprehensive attributes of C1020 Carbon Steel, including its yield strength and equivalent materials, all of which highlight its exceptional robustness and unwavering reliability.

ASTM SAE AISI 1020 Steel: A paragon of quality and consistency, this superb steel grade embodies the pinnacle of precision and outstanding performance.

AISI 1020 steel, widely recognized as C1020 steel, provides unparalleled versatility in its cold-worked form, whether rolled or drawn. Renowned for its superior machinability and weldability, this mild carbon steel is typically available in turned, polished, or cold drawn states, with its low carbon content rendering it less prone to induction or flame hardening, ensuring steadfast performance across an array of applications.

AISI SAE 1020 Steel: Comprehensive Properties & Specifications, offering an extensive overview of its diverse capabilities.

Explore the SAE AISI 1020 steel properties with a comprehensive data sheet that details its chemical composition along with its physical and mechanical properties, providing a thorough understanding of this highly versatile material.

Chemical Composition: Discover the elemental makeup of AISI 1020 steel, underscoring its fundamental 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: Delve into the essential physical attributes that define AISI 1020 steel's outstanding performance and usefulness.

Melting Point: AISI 1020 steel possesses a precise melting point of 1515 °C (2760 °F), ensuring its resilience under high-temperature conditions.
Density of AISI 1020 Steel: With a density of 7.87 g/cm3 (0.0361 lbs/in3), this material boasts a remarkably 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 true testament to its strength and versatility, this section explores the mechanical capabilities of this esteemed steel grade.

The mechanical properties of AISI SAE 1020 steel, such as yield and tensile strength, elongation, section reduction, and hardness, underscore its adaptability and the wide range of applications it can support.
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 excellent performance under stress and 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: Demonstrating exceptional capabilities in precision engineering and manufacturing.

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

SAE AISI 1020 Steel Heat Treatment: Elevate the mechanical properties through advanced treatment processes, including normalization, annealing, and austenitizing, to achieve superior results.

The heat treatment of SAE AISI 1020 mild steel encompasses methods such as normalizing, annealing, and austenitizing, which ensure optimal performance and longevity of the material.

Normalizing AISI 1020: Achieve uniform grain size and improved mechanical properties through meticulous normalizing techniques.

The typical normalizing temperature for SAE AISI 1020 mild steel is an exact 915 °C (1675 °F), guaranteeing optimal structural refinement.

Annealing AISI 1020: A precisely tailored process designed to relieve stress and enhance ductility and toughness.

For small carbon steel forgings (≤ 3 in.), recommended full annealing involves specific temperature and cooling cycles, ensuring enhanced material properties and performance.
Annealing Process: Expertly carried out within a temperature range of 855-900 °C (1575-1650 °F), this process features a meticulously controlled cooling cycle from 855 °C (1575 °F) to 700 °C (1290 °F) at a steady rate of 28 °C/h (50 °F/h), achieving an outstanding Brinell hardness between 111-149 HB. This ensures superior quality and performance of the final product.

Reheating (Austenitizing): Elevate the hardening efficiency by fine-tuning the austenitizing temperature control, ensuring precision and excellence in the process.

Reheating (Austenitizing) for hardening AISI 1020 steel is expertly conducted at temperatures ranging from 760-790 °C (1400-1450 °F), alongside advanced carburizing at 900 to 925 °C (1650 to 1700 °F), guaranteeing top-notch case hardening results and unprecedented strength.

Case Hardening: Significantly enhance surface durability and wear resistance through cutting-edge case hardening techniques, ensuring long-lasting performance and reliability.

The robust surface hardening process of 1020 carbon steel is achieved through precise carburization at a temperature range of 970-955°C. This process is seamlessly executed using an innovative mixture of methane and carrier gases. Post carburization, the steel is immediately quenched in water or brine, ensuring outstanding hardening results and superior durability.

Introducing the quintessential heat treatment for SAE 1020 case hardening, a sophisticated process that significantly boosts both durability and strength of the material, ensuring superior performance.

• The carbon temperature is meticulously maintained between 900-925°C (1650-1700°F). A precise cooling method employing water or caustic solutions is used to enhance the hardening process, achieving optimal results and robustness.
• The reheat temperature is expertly set at 790°C (1450°F), with the cooling process conducted in water or a 3% sodium hydroxide solution to further amplify the material's robustness and longevity.
• During carbonitriding, temperatures are expertly managed between 790-900°C (1450-1650°F), utilizing oil as the cooling medium, which ensures a superior quality finish and enhances material integrity.
• Tempering occurs within a carefully controlled temperature range of 120-205°C (250-400°F). This is crucial for stress relief and significantly boosts crack resistance, though it may not always be mandatory.

Typical Forging Temperature

For AISI 1020 mild steel, the standard forging temperature soars to an impressive 1290°C (2350°F), ensuring optimal malleability, formability, and superior quality in crafted components.

AISI 1020 Carbon Steel Welding

For successful welding of AISI SAE C1020 steel, adhere to these expertly recommended preheat and interpass temperatures to ensure impeccable weld integrity.
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 to achieve premium quality joints.
For thicknesses ranging between 50mm and 100mm, an ideal preheat and interpass temperature of 93°C for low hydrogen, and 150°C for other welding processes is recommended for optimal performance.
Postweld heat treatment is optional, with a suggested temperature range of 590-675°C (1100-1250°F) to further enhance material properties, ensuring outstanding weld endurance.

Application

ASTM AISI SAE 1020 steel showcases exceptional versatility, expertly forming numerous semi-finished products such as square, flat, and round steel bars, alongside sturdy steel plates. It plays a critical role in manufacturing a wide array of components for trucks, automotive, and agricultural equipment, including axles, mechanical parts, cold head bolts, motor shafts, and more. Additionally, this steel is skillfully crafted into structural forms like channels, angles, I-beams, and H-beams, ensuring reliability in diverse applications.

AISI SAE ASTM 1020 Steel Equivalent Material

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

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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