6061 T651 aluminum plate,6061 T651 aluminum alloy plate

Introduction to 6061 T651 aluminum plate

Date:2025-04-01

6061 aluminum plate is one of the most versatile aluminum alloys available, making it a top choice for general-purpose applications. As an aluminum-silicon-magnesium alloy, it is strengthened through precipitation hardening, giving it a balanced combination of medium strength, excellent formability, weldability, machinability, and corrosion resistance.

Thanks to these properties, 6061 aluminum plate is widely used in tooling plates, architectural structures, transportation equipment, bridge railings, and welded structural applications.

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6061-T651 Aluminum Plate Specifications

The 6061-T651 aluminum plate is a heat-treated alloy with superior strength, corrosion resistance, and workability. It offers a tensile strength range of 42–45 KSI and meets industry standards, including:

AMS QQ-A-250/11

ASME SB209

ASTM B209

This combination of strength and versatility makes 6061-T651 aluminum an excellent choice for applications requiring durability, precision, and structural reliability.

6061-T651 Aluminum Plate Chemical Composition (% by weight)

Element	Composition (%)
Aluminum (Al)	95.8–98.6
Magnesium (Mg)	0.8–1.2
Silicon (Si)	0.4–0.8
Iron (Fe)	≤0.7
Copper (Cu)	0.15–0.40
Zinc (Zn)	≤0.25
Titanium (Ti)	≤0.15
Manganese (Mn)	≤0.15
Chromium (Cr)	0.04–0.35
Other Elements	≤0.05 (each),≤0.15 (total)

Key Properties of 6061-T651 Aluminum Plate

Heat-treated & stress-relieved: Offers excellent mechanical stability.

High corrosion resistance: Ideal for marine and structural applications.

Good weldability & machinability: Suitable for precision machining.

Medium-to-high strength: Stronger than 5052, but lower than 7075.

Mechanical Properties of 6061-T651 Aluminum Plate

Property	Value	Unit
Tensile Strength	310 MPa (Min)	MPa (MegaPascal)
Yield Strength	276 MPa (Min)	MPa
Elongation	8–10%	% (in 50mm)
Hardness (Brinell)	95	HB
Shear Strength	207 MPa	MPa
Modulus of Elasticity	68.9 GPa	GPa
Poisson’s Ratio	0.33	—
Thermal Conductivity	167 W/m·K	W/m·K
Electrical Conductivity	43% IACS	% IACS (Compared to Copper)

Key Notes:

T651 Temper means the material has been heat-treated, stress-relieved, and stretched to remove residual stresses.

Compared to 7075 aluminum, 6061-T651 has better corrosion resistance but lower strength.

Good machinability, making it ideal for precision cutting and milling.

Common Applications of 6061-T651 Aluminum Plate

Due to its balance of strength, corrosion resistance, and weldability, 6061-T651 aluminum is widely used in structural, aerospace, transportation, and industrial applications.

Structural & Construction Applications

Bridges and structural components

Roof trusses and support beams

Offshore platforms and marine structures

Aerospace & Automotive Applications

Aircraft and spacecraft components

Vehicle chassis and truck bodies

Motorcycle and bicycle frames

Industrial & Manufacturing Applications

Pipe fittings and valves

Pressure vessels and storage tanks

Machinery and tooling components