2022-11-04 https://www.aluminum-coils.com/a/3a21-aluminum-plate.html
3a21 aluminum plate (ingredient) performance 3a21 aluminum alloy implementation standard: GB/T 6891-19863a21 aluminum alloy characteristics
3A21 aluminum plate is Al-Mn alloy, 3A21 aluminum plate is the most widely used rust-proof aluminum, the strength is not high (only slightly higher than industrial pure aluminum), can not be heat-treated and strengthened, so cold processing method is often used to improve its mechanical properties; It has high plasticity in the annealed state, good plasticity in semi-cold hardening, low plasticity in cold work hardening, good corrosion resistance, good weldability and poor machinability.
Application range
Uses are mainly used for low load parts requiring high plasticity and good weldability in liquid or gaseous media, such as fuel tanks, gasoline or lube oil conduits, various liquid containers and other small load parts made with deep drawing: The wire is used to make rivets. The has good formability, weldability and corrosion resistance. Used for processing parts parts that require good formability, high corrosion weldability, or require both these properties and work with higher strength than 1XXX series alloys, such as kitchen utensils, food and chemical products. Device, tank for transporting liquid products, tanks, various pressure vessels and pipes for processing with thin plates, general radiators, heat sinks, cosmetic plates, photocopier drums, marine materials
3a21 aluminum alloy physical properties
chemical composition
Aluminum Al: balance
Silicon Si: ≤0.6
Copper Cu : ≤ 0.20
Magnesium Mg: ≤ 0.05
Zinc Zn: ≤ 0.10
Manganese Mn: 1.0 to 1.6
Titanium Ti : ≤ 0.15
Titanium + Rare Earth Ti+Zr: Define T i+Zr ≤0.20 for extruded and forged products
Iron Fe: 0.000~ 0.700
Note: Single: ≤ 0.05; Total: ≤ 0.10
Heat treatment specification
1) Homogenization annealing: heating 510 ~ 520 ° C; holding 4 ~ 6h; air cooling.
2) rapid annealing: heating 350 ~ 410 ° C; with the effective thickness of the material, holding time 30 ~ 120min; empty or water cooled.
3) High temperature annealing: heating 350 ~ 500 ° C; finished product thickness ≥ 6mm, holding time 10 ~ 30min, <6mm, heat through; air cooling.
4) Low temperature annealing: heating 250 ~ 300 ° C; holding time is 1 ~ 3h; empty or water cooled.
Status: Aluminum and aluminum alloy profiled board (0.6~0.8mm, HX8 state)
