High-Quality Steel Flat Bar, AISI 1020 Carbon Alloy Specifications

• Customization: Available
• Type: Carbon Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Model NO.: carbon steel
• Composition: Stainless Steel Scrap
• 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

Explore the robust properties of SAE AISI 1020 Steel, a versatile carbon alloy known for its impressive yield strength and comparable alternatives.

Discover the exceptional attributes of ASTM SAE AISI 1020 Steel.

AISI 1020 steel, also recognized in its cold-rolled or cold-drawn form as C1020 steel, stands out for its excellent machinability and weldability. This popular plain carbon steel can be hot rolled or cold drawn but is typically found in turned, polished, or cold-drawn states. Its low carbon makeup makes it less susceptible to induction or flame hardening.

Comprehensive AISI SAE 1020 Steel Properties and Specifications.

Below is a detailed data sheet featuring the SAE AISI 1020 steel's chemical composition, alongside its physical and mechanical properties.

Chemical Composition Overview

	AISI SAE 1020 Steel Chemical Composition (%)
AISI	C	Mn	P (≤)	S (≤)
1020	0.18-0.23	0.30-0.60	0.040	0.050

Insights into Physical Properties

Remarkable melting point of 1020 steel: 1515 °C (2760 °F)
Impressive density of 1020 steel: 7.87 g/cm³ (0.0361 lbs/in³)

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

In-depth Mechanical Properties of SAE AISI 1020 Mild Steel

This data elaborates on the mechanical properties of AISI SAE 1020 steel, covering yield strength, tensile strength, elongation, section reduction, and hardness in diverse conditions.
The Young's modulus (modulus of elasticity) of SAE AISI 1020 carbon steel in its as-received condition is 186 GPa (27×106 psi).

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 Insights

AISI SAE 1020 carbon steel boasts a machinability rating of 65, based on a 100% benchmark for 1212 steel.

SAE AISI 1020 Steel Heat Treatment Techniques

Explore the heat treatment processes for SAE AISI 1020 mild steel, including normalizing, annealing, and austenitizing.

Normalizing Process for AISI 1020

The standard normalizing temperature for SAE AISI 1020 mild steel is 915 °C (1675 °F).

Annealing Process for AISI 1020

Suggested parameters for full annealing of small carbon steel forgings (≤ 3 inches):
The annealing temperature ranges from 855-900 °C (1575-1650 °F), with a cooling cycle from 855 °C (1575 °F) to 700 °C (1290 °F). Furnace cooling occurs at 28 °C/h (50 °F/h), yielding a Brinell hardness of 111-149 HB.

Reheating (Austenitizing) Process

Reheating (austenitizing) temperatures for hardening SAE 1020 steel are between 760-790 °C (1400-1450 °F). Carburizing is typically done at 900 to 925 °C (1650 to 1700 °F).

Case Hardening Techniques

Dive into the precise science of surface hardening for AISI 1020 carbon steel, where the carburization process unfolds at a meticulous temperature range of 970-955 °C. This transformation takes place amidst a sophisticated blend of methane and carrier gases. The hardening is perfected through a swift journey from this elevated temperature into water or brine, ensuring a robust finish.

Unveil the quintessential art of heat treatment tailored for SAE 1020 case hardening, designed to enhance durability and strength.

• Embark on an exploration of the carbon temperature dynamics, set between 900-925 °C (1650-1700 °F), followed by an intricate cooling method utilizing either water or caustic solutions to achieve the desired material properties.
• Elevate your understanding of the reheat process by studying the precise reheat temperature of 790 °C (1450 °F), coupled with a strategic cooling approach using water or a 3% sodium hydroxide solution to maximize material resilience.
• Delve into the nuanced carbonitriding process, executed at temperatures ranging from 790-900 °C (1450-1650 °F), with cooling optimized through oil to enhance surface hardness and fatigue resistance.
• Explore the tempering phase with temperatures set between 120-205 °C (250-400 °F), a crucial step for stress relief and improving resistance to cracking, though not mandatory, it provides an extra layer of reliability.

Typical Forging Temperature

Explore the forging landscape with AISI 1020 mild steel, where the typical forging temperature reaches a fiery 1290 °C (2350 °F), facilitating optimal malleability and shaping.

AISI 1020 Carbon Steel Welding

Master the welding process for AISI SAE C1020 steel with meticulously recommended preheat and interpass temperatures to ensure flawless craftsmanship:
For materials with thickness ≤50mm (2 in.), the preheat and interpass climate should remain above -12 °C for low hydrogen processes, and rise to 38 °C for other welding techniques, ensuring precision and quality.
When dealing with thicknesses (t) ranging 50< t ≤100, the preheat and interpass temperature should be carefully managed at 93 °C for low hydrogen processes, and elevated to 150 °C for alternative methods, guaranteeing structural integrity.
Consider the optional postweld heat treatment, which can be performed at a temperature spectrum of 590-675 °C (1100-1250 °F) to refine and stabilize the welded structure.

Application

Discover the versatile applications of ASTM AISI SAE 1020 steel, expertly crafted into a variety of semi-finished products such as square, flat, and round steel bars, as well as steel plates. These are the building blocks for automotive and agricultural equipment parts including axles, mechanical components, cold head bolts, motor shafts, pump shafts, ratchets, light gears, gear drives, worm gears, spindles, seat brackets, crane-cable drums, motor-brake wheels, and more. Additionally, they are often formed into steel channels, steel angles, I-beams, and H-beams, showcasing their adaptability and strength.

AISI SAE ASTM 1020 Steel Equivalent Material

Recognize the global equivalency of SAE ASTM AISI 1020 carbon steel, matching seamlessly with European EN standards, Germany's DIN EN, British BSI, French NF, Japan's JIS, and China's GB standard, reflecting its universal applicability and quality.

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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