Durable Smooth Carbon Alloy Steel Flat Bar, AISI 1020 Specification

• 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: Unlock the intricate details of C1020 Carbon Steel, which boasts remarkable yield strength and comparable equivalents, underscoring its impressive robustness and unwavering reliability.

ASTM SAE AISI 1020 Steel: This steel grade is a paragon of quality and uniformity, epitomizing precision and unparalleled performance.

AISI 1020 steel, commonly known as C1020 steel, is renowned for its outstanding versatility in cold worked forms, be it rolled or drawn. Esteemed for superior machinability and weldability, this mild carbon steel is available in turned, polished, or cold drawn states. Its low carbon content minimizes susceptibility to induction or flame hardening, ensuring stable performance across diverse applications.

AISI SAE 1020 Steel: Discover the full spectrum of its comprehensive properties and specifications, offering deep insights into its multifaceted capabilities.

Uncover the SAE AISI 1020 steel properties with a comprehensive data sheet detailing its chemical composition, alongside its physical and mechanical properties, granting a complete understanding of this versatile material.

Chemical Composition: Reveal the elemental composition of AISI 1020 steel, emphasizing its core characteristics and foundational attributes.

	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 characteristics that define AISI 1020 steel's exceptional performance and usability.

Melting Point: With a precise melting point of 1515 °C (2760 °F), AISI 1020 steel exhibits outstanding high-temperature resilience.
Density of AISI 1020 Steel: With a density of 7.87 g/cm3 (0.0361 lbs/in3), this material showcases a strong and 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 adaptability, this section explores the mechanical prowess of this esteemed steel grade.

The mechanical attributes of AISI SAE 1020 steel, encompassing yield and tensile strength, elongation, section reduction, and hardness, underscore its versatility and wide application range.
SAE AISI 1020 Carbon Steel: Young's Modulus: In its as-received state, this steel presents a Young's modulus of 186 GPa (27×106 psi), assuring 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: Demonstrates 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 proves to be a reliable choice for manufacturing processes.

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

The heat treatment of SAE AISI 1020 mild steel includes procedures like normalizing, annealing, and austenitizing, ensuring superior performance and durability.

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

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

Annealing AISI 1020: This tailored process relieves stress, while enhancing ductility and toughness.

For small carbon steel forgings (≤ 3 in.), a recommended full annealing process involves specific temperature and cooling cycles, ensuring improved material qualities.
Annealing Process: Meticulously conducted at a range of 855-900 °C (1575-1650 °F), this process includes a well-controlled cooling cycle from 855 °C (1575 °F) down to 700 °C (1290 °F) at a gentle rate of 28 °C/h (50 °F/h). The result is a desirable Brinell hardness between 111-149 HB, ensuring material reliability and performance.

Reheating (Austenitizing): Elevate the hardening potential of your steel through expertly regulated austenitizing temperature control, optimizing results for superior strength and durability.

Reheating (Austenitizing) for hardening AISI 1020 steel is expertly conducted within an ideal range of 760-790 °C (1400-1450 °F). This process is further enhanced by carburizing at temperatures between 900 to 925 °C (1650 to 1700 °F), ensuring outstanding case hardening outcomes.

Case Hardening: Amplify your steel's surface durability and resistance to wear through advanced and precise case hardening techniques designed to enhance industrial performance.

The formidable surface hardening of 1020 carbon steel is meticulously achieved through carburization within a precise temperature range of 970-955°C, conducted in an innovative blend of methane and carrier gases. Upon completion, the steel is expertly quenched in water or brine, delivering exceptional hardening results that meet rigorous industry standards.

Introducing the robust heat treatment for SAE 1020 case hardening, a sophisticated process that significantly enhances the material's durability and strength, making it ideal for demanding applications.

• The carbon temperature is carefully maintained between 900-925°C (1650-1700°F). This precise control, coupled with a refined cooling method using water or caustic solutions, optimizes the hardening process to ensure peak material performance.
• The reheat temperature is expertly set at 790°C (1450°F), with cooling carried out in water or a 3% sodium hydroxide solution. This process significantly boosts the material's robustness, ensuring it meets industry demands.
• During the carbonitriding process, temperatures are expertly managed within a range of 790-900°C (1450-1650°F), utilizing oil as the cooling medium to ensure a high-quality finish and enhanced material properties.
• Tempering occurs at carefully controlled temperatures ranging from 120-205°C (250-400°F). This critical step offers essential stress relief, greatly improving crack resistance, and though not always necessary, it provides enhanced reliability.

Typical Forging Temperature

For AISI 1020 mild steel, the typical forging temperature reaches a substantial 1290°C (2350°F), ensuring optimal malleability and formability, which is crucial for high-quality forging results.

AISI 1020 Carbon Steel Welding

For achieving successful welding of AISI SAE C1020 steel, adhere to these recommended preheat and interpass temperatures to ensure optimal joint integrity and strength.
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, ensuring ideal welding conditions.
For thicknesses ranging between 50mm and 100mm, the premium preheat and interpass temperature should be 93°C for low hydrogen applications and 150°C for other welding processes, guaranteeing superior weld quality.
Postweld heat treatment is an optional yet beneficial process, recommended within a temperature range of 590-675°C (1100-1250°F), to further enhance material properties and ensure long-term performance.

Application

ASTM AISI SAE 1020 steel is renowned for its versatility, effortlessly forming an array of semi-finished products such as square, flat, and round steel bars, and steel plates. This steel is pivotal in crafting numerous components across trucks, automotive, and agricultural equipment sectors, including axles, intricate mechanical parts, cold head bolts, motor shafts, and more. Moreover, it is frequently fashioned into essential structural forms like steel channels, angles, I-beams, and H-beams, underscoring its integral role in modern engineering.

AISI SAE ASTM 1020 Steel Equivalent Material

The SAE ASTM AISI 1020 carbon steel harmoniously aligns with esteemed European EN standards (including Germany DIN EN, British BSI, French NF), Japanese JIS, and Chinese GB standards, ensuring its global applicability and uniformity, making it a ubiquitous choice for international projects.

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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