3A21 Aluminum Bars

3A21 Aluminum Bars Specifications

Standards: ASTM B221, B211, B565, B316 3003, DIN AlMnCu

Aluminum bar form: Aluminum round, hexagonal, flat, semi-circular, oval, rectangular black, and glossy finish

Aluminum round bar diameter: 0.1-600mm, etc.

Aluminum hexagonal bar: 0.1-600mm, etc.

Aluminum angle bar size: 0.5mm*40mm*40mm-20mm*400mm*400mm

Aluminum flat steel thickness: 0.1-600mm, etc.

Aluminum flat bar size: 1-2500mm, etc.

Aluminum round bar length: 1-12m, random, fixed, and cut length or according to customer requirements

3A21 Aluminum Bar Product Introduction

Rust-proof aluminum, good corrosion resistance, good weldability

3A21 aluminum alloy is Al-Mn alloy, 3A21 aluminum alloy is the most widely used anti-rust aluminum, the strength is not high (only slightly higher than the industrial pure aluminum), can not be heat treatment strengthening, so often use cold working methods to improve its mechanical properties; It has high plasticity in the annealed state, good plasticity when semi-cold work hardening, low plasticity when cold work hardening, good corrosion resistance, good weldability, and poor machinability.

3A21 Aluminium Bar Typical Uses

3A21 applications are mainly used for high plasticity and good weldability, such as aerospace, military equipment, tooling fixtures, automobiles, transportation, the production of propellant storage boxes, welding structural cabin body skin, end frames, brackets, and other weldments, as well as conduits working in corrosive media.

Aerospace: For non-structural components and fittings.
Automotive: Used in manufacturing fuel tanks, heat shields, and interior trim.
Construction: For roofing, siding, and cladding applications.
Packaging: In food and beverage packaging due to its corrosion resistance and formability.
Industrial Equipment: Used in heat exchangers, chemical processing equipment, and pressure vessels.

3A21 Aluminum Bar Data Sheet

Chemical Composition

Alloy grade

other

New grade

Old grade

0.60

0.70

0.20

1.0-1.6

0.05

——

0.10

0.15

——

each

total

3A21

LF21

0.05

0.15

Allowance

Mechanical Properties

Aluminum alloy grade and state	Tensile strength Rm/Mpa	Yield strength Rp0.2/Mpa	Elongation/%	Hardness/ HBWα
3A21-H112	≤167	——	20	——

Quality Characteristics

Density: 2.73 g/cm³
Melting Point: Approximately 655°C
Thermal Conductivity: High thermal conductivity, suitable for heat exchanger and thermal management applications.

Corrosion Resistance

3A21 aluminium bar offers excellent corrosion resistance, particularly in environments exposed to atmospheric and seawater conditions. The manganese content enhances its resistance to corrosion, making it suitable for marine and industrial applications.

Weldability

3A21 aluminum bar demonstrates excellent weldability with all standard welding techniques, such as TIG, MIG, and resistance welding. It is particularly suitable for applications requiring strong welded joints.

Formability

This alloy has superior formability and can be easily cold-worked by rolling, bending, and stamping. Its ductility allows for the manufacturing of intricate shapes and complex components without cracking.

3A21 Aluminum Bar Packages

The following is our company’s standard aluminum bar export packaging. If the customer has any packaging requirements, our company can meet them.

FAQ

1. What is 3A21 Aluminum Bar?

3A21 aluminum bar is an aluminum-manganese alloy known for its excellent corrosion resistance and good formability. It is widely used in applications requiring moderate strength and high corrosion resistance.

2. What are the Main Chemical Components of 3A21 Aluminum Bars?

3A21 aluminum alloy is primarily composed of aluminum (Al) with a significant amount of manganese (Mn), which enhances its strength and corrosion resistance.

3. What are the Typical Applications of 3A21 Aluminum Bars?

3A21 aluminium bar is commonly used in applications such as chemical equipment, storage tanks, marine environments, and pressure vessels. Its excellent corrosion resistance makes it ideal for use in harsh environments.

4. What are the Mechanical Properties of 3A21 Aluminum Bars?

3A21 aluminum alloy offers moderate strength with excellent corrosion resistance. It has a tensile strength range typically from 180 to 230 MPa and exhibits good formability and weldability.

5. How Does 3A21 Aluminum Bar Compare to 3003 Aluminum Bar?

3A21 aluminium bar is similar to 3003 in terms of corrosion resistance and workability but generally offers slightly higher strength. Both alloys are ideal for applications requiring good corrosion resistance and formability.

6. Is 3A21 Aluminum Bar Suitable for Welding?

Yes, 3A21 aluminum bar is suitable for welding using conventional methods. Its good weldability makes it a versatile choice for a variety of fabrication projects.

7. How Does 3A21 Aluminum Bar Compare to 5052 Aluminum Bar?

Compared to 5052 aluminum bar, 3A21 aluminum bar has lower strength but similar corrosion resistance. 5052 is preferred for applications requiring higher strength and better weldability, while 3A21 is suitable for moderate strength applications with a focus on corrosion resistance.