Premium Smooth Carbon Alloy Steel Flat Bar, AISI 1020 Standard

• 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 comprehensive attributes of C1020 Carbon Steel. This includes detailed insights into its yield strength and equivalents, a testament to its robustness, reliability, and superior performance.

ASTM SAE AISI 1020 Steel: Renowned for its impeccable quality and unwavering consistency, this steel grade is synonymous with precision and outstanding performance, setting a benchmark in the industry.

AISI 1020 steel, also known as C1020 steel, is celebrated for its remarkable versatility, especially in its cold-worked form, available in both rolled and drawn states. This mild carbon steel is praised for its excellent machinability and weldability, typically offered in turned, polished, or cold-drawn conditions. Its low carbon content minimizes susceptibility to induction or flame hardening, ensuring consistent and reliable performance across a wide spectrum of applications.

AISI SAE 1020 Steel: Comprehensive Properties & Specifications, offering a detailed analysis and insight into its numerous capabilities and applications.

Explore the SAE AISI 1020 steel properties through an exhaustive data sheet that details its chemical composition along with physical and mechanical properties. This provides a thorough understanding of this versatile material.

Chemical Composition: Discover the elemental composition of AISI 1020 steel, highlighting the foundational characteristics that make it unique.

	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 the performance and usability of AISI 1020 steel.

Melting Point: AISI 1020 steel boasts a melting point of 1515 °C (2760 °F), a characteristic that ensures its resilience to high temperatures.
Density of AISI 1020 Steel: With a density of 7.87 g/cm3 (0.0361 lbs/in3), this material provides a solid and robust structural profile, ideal for various 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: 10-6/K = 10-6.K-1 = (µm/m)/°C

Mechanical Properties of SAE AISI 1020 Mild Steel: Highlighting its strength and adaptability, this section delves into the mechanical prowess of this renowned steel grade, showcasing its applications.

The mechanical properties of AISI SAE 1020 steel, including yield and tensile strength, elongation, section reduction, and hardness, underscore its versatility and broad application range.
SAE AISI 1020 Carbon Steel: Young's Modulus: In its as-received state, this steel reveals a Young's modulus of 186 GPa (27×106 psi), ensuring robust performance and resilience under stress, making it a reliable choice in various 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: Exceptional performance in precision engineering and manufacturing, making it ideal for diverse manufacturing needs.

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

SAE AISI 1020 Steel Heat Treatment: Enhance the steel's mechanical properties through sophisticated treatment processes, including normalization, annealing, and austenitizing, ensuring optimal performance.

The heat treatment of SAE AISI 1020 mild steel encompasses advanced processes like normalizing, annealing, and austenitizing, guaranteeing peak performance and enhanced durability.

Normalizing AISI 1020: Achieve a uniform grain size and improved mechanical properties using precise normalizing techniques.

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

Annealing AISI 1020: A meticulously tailored process aimed at relieving stress and enhancing ductility and toughness, critical for demanding applications.

For small carbon steel forgings (≤ 3 in.), a meticulously detailed full annealing process is recommended, involving specific temperature and cooling cycles to ensure enhanced material properties.
Annealing Process: This meticulous process unfolds between 855-900 °C (1575-1650 °F) with an expertly controlled cooling rate of 28 °C/h (50 °F/h), transitioning smoothly from 855 °C (1575 °F) to 700 °C (1290 °F). The result is a refined Brinell hardness range of 111-149 HB, ensuring exceptional quality.

Reheating (Austenitizing): Elevate the hardening capabilities with our precision-engineered austenitizing temperature controls, tailored meticulously for optimal results.

Reheating (Austenitizing) for hardening AISI 1020 steel is executed meticulously at 760-790 °C (1400-1450 °F). This process is beautifully complemented by carburizing at a higher range of 900 to 925 °C (1650 to 1700 °F), guaranteeing outstanding case hardening quality and performance.

Case Hardening: Unlock superior surface durability and enhanced wear resistance through our expertly-crafted case hardening techniques, designed to deliver excellence.

The robust surface hardening process for 1020 carbon steel is achieved expertly through carburization at a precise temperature range of 970-955°C. This procedure is innovatively conducted in a unique blend of methane and carrier gases. Post-carburization, the steel is quenched directly into water or brine, ensuring superior hardening outcomes.

Introducing the typical heat treatment process for SAE 1020 case hardening, a sophisticated technique that significantly boosts durability and strength.

• The carbon temperature is meticulously maintained between 900-925°C (1650-1700°F), and a precise cooling approach utilizing water or caustic solutions is employed to optimize the hardening process effectively.
• The reheat temperature is expertly set at 790°C (1450°F), with cooling conducted seamlessly in water or a 3% sodium hydroxide solution, which significantly enhances material robustness.
• During carbonitriding, temperatures are meticulously controlled within a range of 790-900°C (1450-1650°F), using oil as the cooling medium to ensure a premium, high-quality finish.
• Tempering occurs at temperatures ranging from 120-205°C (250-400°F), a critical process for stress relief and substantially improved crack resistance, although it is not always necessary.

Typical Forging Temperature

For AISI 1020 mild steel, the typical forging temperature is an impressive 1290°C (2350°F), promoting optimal malleability and formability for diverse applications.

AISI 1020 Carbon Steel Welding

For successful welding of AISI SAE C1020 steel, follow these precise preheat and interpass temperature guidelines to ensure superior results.
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 ensure optimal performance.
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 to ensure premium results.
Postweld heat treatment is optional, with a recommended temperature range of 590-675°C (1100-1250°F) to significantly enhance material properties and integrity.

Application

ASTM AISI SAE 1020 steel is renowned for its versatility, forming a diverse array of semi-finished products like square, flat, and round steel bars, as well as steel plates. It plays a pivotal role in manufacturing components for trucks, automotive, and agricultural equipment, including axles, mechanical parts, cold head bolts, motor shafts, and more. Additionally, this steel is commonly crafted into structural forms, such as steel channels, angles, I-beams, and H-beams, underscoring its broad applicability.

AISI SAE ASTM 1020 Steel Equivalent Material

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

Detailed Photos