Name: 3A21 Aluminum Bar
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3A21 Aluminum Bar

3A21 aluminum bar is an Al-Mn alloy. It is made from a widely used anti-rust aluminum with good corrosion resistance and good weldability. The bar is mainly used for applications requiring high plasticity and good weldability. And it usually works in liquid or gas media.

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Product Description

3A21 Aluminum Bar Description

3A21 aluminum alloy, also known as A921 aluminum alloy, is an aluminum alloy material composed of aluminum and a small amount of other alloy elements such as manganese, copper, chromium, and Zinc. 3A21 aluminum bar has good tensile strength and yield strength and can meet applications with various strength requirements. 3A21 aluminum alloy has good corrosion resistance and can be used for a long time in humid and corrosive environments without rusting easily. Besides, 3A21 aluminum bar can be subjected to various surface treatments, such as anodizing, spraying, chrome plating, etc., to increase its surface hardness and decoration. Another thing that makes 3A21 aluminum bar a favorable option is aluminum alloy is light in weight and low in density compared to other metals. It is an ideal lightweight material and is suitable for product designs that require light weight.

Product Parameters

Diameter	5-650mm or customized	Length	100-2000mm or customized
Certificate	ISO, SGS, BV
Standard	JIS, AISI, ASTM, GB, DIN, EN, etc.
Brand	1000 Series: 1050, 1060, 1070, 1100, 1200, 1235, etc. 3000 Series: 3003, 3004, 3005, 3104, 3105, 3A21, etc. 5000 Series: 5005, 5052, 5083, 5086, 5154, 5182, 5251, 5754, 5A05, etc. 6000 Series: 6061, 6063, 6082, 6A02, etc. 7000 Series: 7050, 7475, 7075, etc. 8000 Series: 8A06, 8011, 8090, etc.
Surface	Coating, Embossing, Drawing, Polishing, Anodizing, etc.
OEM Service	Punching, Cutting special size, Making flat surface, Surface treatment, etc.
Delivery Time	Received 30% after deposit 7-15 working days
Application	Construction, Shipbuilding, Decoration, Industry, Manufacturing, Machinery, Hardware and other fields
Sample	Free Offers Sample
Packaging	Strapping, Plastic bag, Film, Wooden pallet Standard seaworthy export packing or according to customer requirement

Chemical Composition

Alloy	Si	Fe	Cu	Mn	Mg	Cr	Zn	Ti	Others: Each	Others: Total	Al: Min.
1050	0.25	0.40	0.05	0.05	0.05	-	0.05	0.03	0.03	-	99.50
1060	0.25	0.35	0.05	0.03	0.03	-	0.05	0.03	0.03	-	99.60
1070	0.20	0.25	0.04	0.03	0.03	-	0.04	0.03	0.05	-	99.70
1100	0.95 Si Fee		0.05~0.20	0.05	-	-	0.1	-	0.05	0.15	99.0
2014	0.5~1.2	0.7	3.9~5.0	0.4~1.2	0.2~0.8	0.10	0.25	0.15	0.05	0.15	Allowance
2017	0.2~0.8	0.7	3.5~4.5	0.4~1.0	0.4~0.8	0.10	0.25	0.15	0.05	0.15	91.5 - 95.5
2024	0.50	0.50	3.8~4.9	0.3~0.9	1.2~1.8	0.10	0.25	0.15	0.05	0.15	Allowance
3003	0.60	0.70	0.05~0.20	1.0~1.5	-	-	0.10	-	0.05	0.15	Allowance
3A21	0.60	0.70	0.20	1.0-1.6	0.05	-	0.15	0.1-0.2	-	-	Allowance
3004	0.30	0.70	0.25	1.0~1.5	0.8~1.3	-	0.25	-	0.05	0.15	Allowance
3005	0.60	0.70	0.30	1.0~1.5	0.2~0.6	0.10	0.25	0.10	0.05	0.15	Allowance
3105	0.60	0.70	0.30	0.3~0.8	0.2~0.8	0.20	0.40	0.10	0.05	0.15	Allowance
5005	0.30	0.70	0.20	0.20	0.5~1.1	0.1	0.25	-	0.05	0.15	Allowance
5052	0.25	0.40	0.10	0.10	2.2~2.8	0.15~0.35	0.10	-	0.05	0.15	Allowance
5754	0.40	0.40	0.10	0.50	2.6~3.6	0.30	0.20	0.15	0.05	0.15	Allowance
5A05	0.50	0.50	0.10	0.3-0.6	4.8-5.5	-	0.20	-	0.05	0.05	Allowance
5083	0.40	0.40	0.10	0.4~1.0	4.0~4.9	0.05~0.25	0.25	0.15	0.05	0.15	Allowance
6061	0.40~0.8	0.70	0.15~0.4	0.15	0.8~1.2	0.04~0.35	0.25	0.15	0.05	0.15	Allowance
6082	0.70~1.3	0.50	0.10	0.4~1.0	0.6~1.2	0.25	0.20	0.10	0.05	0.15	Allowance
7075	0.40	0.50	1.2~2.0	0.30	2.1~2.9	0.18~0.28	5.1~6.1	0.20	0.05	0.15	Allowance

Mechanical Properties

Tensile Strength

(MPa)

Yield Strength

(MPa)

Hardness

Elongation Rate

(%)

89.6

15-28

Physical Performance

Density	Melting Point	Modulus of Elasticity	Thermal Conductivity
2.71 Kg/m³	643-675.2 °C	68.9 GPa	222 W/m.K

Annealing State

Brand	Annealing State
1xxx: 1050, 1050A, 1060, 1100	O, H12, H14, H16, H18, H22, H24, H26, H28, H111
3xxx: 3003, 3004, 3005, 3105	O, H12, H14, H16, H18, H22, H24, H26, H28, H111
5xxx: 5005, 5052, 5754, 5083, 5086, 5182, 5049, 5251, 5454	O, H22, H24, H26, H28, H32, H34, H36, H38, H111
6xxx: 6061, 6082	T4, T6, T451, T651
2xxx: 2024	T3, T351, T4
7xxx: 7075	T6, T651

Scope of Application

Aluminum Uses And Application Area
Food Packaging	Beverage can ends, cans, bottle caps, etc.
Building	Curtain walls, cladding, suspended ceilings, thermal insulation, venetian blinds, etc.
Transportation	Auto parts, passenger car bodies, aviation ships and air cargo containers.
Electronic Equipment	Electrical appliances, communication equipment,PCPlate drilling guide, lighting and heat dissipation materials, etc.
Consumer Goods	Umbrellas, cooking utensils, sports equipment, etc
Other	Military, color coated aluminum plate

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Product Application

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Packaging and shipping

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Factory Display

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FAQ

Q1: What types of steel products does your company primarily manufacture and supply?
A: We are a direct manufacturer specializing in carbon steel, hot-dip galvanized steel, PPGI (pre-painted galvanized iron), and stainless steel (grades 201, 304, and 316) in the form of sheets, coils, pipes, and various structural profiles, along with complementary steel structural components. Our products serve a wide range of industries, including infrastructure, photovoltaics, machinery manufacturing, chemicals, and new energy.

Q2: Do you support customization regarding material grades, thicknesses, and dimensions?
A: Customization is available across our entire product range. For carbon steel, galvanized steel, and stainless steel, we can adjust thickness, width, and cut-to-length dimensions according to GB, ASTM, or EN standards. Various profiles can be cut and bent based on customer drawings, and special steel grades can be produced through customized scheduling.

Q3: What is the difference between galvanized steel and color-coated (PPGI) steel, and how should I choose for my project?
A: Hot-dip galvanized steel features a pure zinc anti-rust layer; it is cost-effective and impact-resistant, making it ideal for mounting brackets, guardrails, and load-bearing factory structures (and it can be painted over). PPGI color-coated steel uses a galvanized base, offering both rust protection and aesthetic appeal with a wide range of colors; it is commonly used for factory roofing, wall cladding, and energy storage equipment casings. We recommend thicker galvanized coatings for projects in rainy coastal areas, color-coated sheets for outdoor projects requiring visual appeal, and weather-resistant fluorocarbon (PVDF) coatings for high-temperature desert environments.

Q4: Does the factory keep stock on hand, and what is the minimum order quantity (MOQ)?
A: We operate our own standardized, zoned warehouse with a capacity of over 10,000 tons, maintaining ample stock of carbon steel, galvanized steel, and stainless steel. The MOQ for standard specifications is 1 ton, though we also accept sample orders as small as a few dozen kilograms. There is no upper limit for large-scale projects, and we support mixed-load shipments combining different steel products in a single container.

Q5: What are the lead times for stock items versus customized products?
A: Standard stock items take 3–7 days for processing, packaging, and container loading. Simple cutting and bending orders take 7–10 days. Orders requiring mold creation or special steel customization take 15–30 days; exact delivery dates are confirmed based on the customer's specific order specifications.

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