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Different Tempers of Automotive Sheet 5754

In the technological wave of the automotive industry pursuing "lightweight, high strength, and long life", aluminum alloy has become one of the core materials with its excellent comprehensive performance. Among them, 5754 aluminum alloy has its unique composition design (Mg content is about 2.6%-3.6%, supplemented by Mn, Cr and other elements) and flexible state regulation, showing irreplaceable advantages in the fields of body, chassis, power system, etc.

5754 aluminum sheet.jpg

5754 aluminum alloy forms a variety of tempers through annealing, cold working, aging treatment and other processes, adapting to a variety of automotive scenarios:

1. O temper

Process: After full annealing (350-400℃ insulation and slow cooling), work hardening is eliminated and grains are refined.

Performance: tensile strength 190-220MPa, yield strength ≤100MPa, elongation ≥22%.

Application: body panels (such as door inner panels, hood inner panels), which need to withstand large deformation stamping; battery pack shell, using its good ductility and corrosion resistance to protect the battery cell.

2. H111 temper

Process: Al 5754 h111 undergoes mild cold working (such as straightening and flattening) after annealing, retaining some work hardening.

Performance: Tensile strength 210-250MPa, yield strength 100-150MPa, elongation ≥20%.

Application: Chassis components (such as control arm brackets, subframe connectors), taking into account structural stability and adaptability to local deformation during installation; interior frames, which need to be lightweight and easy to weld and assemble.

3. H112 temper

Process: Applicable to the natural aging state after hot processing (such as extrusion, forging), without additional cold processing.

Performance: tensile strength 220-260MPa, yield strength 120-160MPa, elongation ≥18%.

Application: extruded body longitudinal beams and cross beams, using their uniform structure after hot processing to improve impact resistance; hub unit support structure, combining corrosion resistance and medium strength requirements.

4. T4/T6 temper

T4 process: solution treatment (rapid cooling at about 560℃) + natural aging to improve strength and hardness.

Performance: tensile strength ≥260MPa, yield strength ≥140MPa, elongation ≥16%.

Application: seat frame, steering system connecting rod, key structural parts that need to withstand dynamic loads.

T6 process: solution treatment + artificial aging (150-180℃ insulation) for further strengthening.

Performance: tensile strength 320-340MPa, yield strength 280-300MPa, elongation ≥12%.

Application: new energy vehicle motor housing, battery pack bracket, to ensure structural safety in high stress environment (such as energy absorption during collision).

5. H22 temper

Process: 5754 h22 goes through partial annealing after cold working (about 250-300℃ for 1-2 hours), eliminating about 75% of work hardening and retaining 25% of cold working effect.

Performance: tensile strength 230-270MPa, yield strength 150-190MPa, elongation 18%-20%.

Application:

Body structure parts: door anti-collision beams, roof longitudinal beams, etc., which need to take into account both anti-sag ability and local deformation adaptability.

Battery pack components: battery module brackets, liquid cooling pipes, using their corrosion resistance and medium strength to cope with vibration and thermal cycles.

Interior trims: instrument panel frames, seat trims, can achieve high gloss surfaces through anodizing while meeting lightweight requirements.

Comparative advantages:

Compared with H111: H22 has higher strength (tensile strength increased by 10%-20%), but slightly lower elongation, suitable for parts with higher rigidity requirements.

Compared with H112: H22's cold working process makes its surface smoother, suitable for decorative parts that require high-precision molding.

Compared with T4/T6: H22 does not require solid solution treatment, has lower production costs, and retains a certain degree of work hardening, suitable for non-critical load-bearing parts.

Original Source:https://www.autoaluminumsheet.com/a/different-tempers-of-automotive-sheet-5754.html

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