5083 Aluminum belongs to Al-Mg 5xxx non-heat treatable aluminum alloy, Mg content 4.0–4.9%, the most widely used marine & structural aluminum plate grade. Temper H111: Light strain hardening after annealing, slight cold rolling, no extra hardening; balanced ductility, forming performance and mechanical strength.
Chemical Composition (Main Elements, wt%)
| Element | Mg | Mn | Fe | Si | Cr | Cu | Al |
|---|---|---|---|---|---|---|---|
| Content | 4.0–4.9 | 0.4–1.0 | ≤0.4 | ≤0.4 | 0.05–0.25 | ≤0.1 | Balance |
Mechanical Properties (Typical for 5083-H111 Aluminum Plate)
- Tensile strength: 270–305 MPa
- Yield strength: ≥110 MPa
- Elongation: ≥16%
- Hardness HB: ~70–80 HB
For standard industrial oil tanks (transport or stationary storage), 5083 H111 is the superior alloy by all critical metrics: structural strength, anti-deformation, weld reliability, long-term fuel corrosion resistance, and service lifespan.
5083 Aluminum Plate For Oil Tank Fabrication
① Excellent Corrosion Resistance
- Dense magnesium oxide protective film; outstanding resistance to diesel, gasoline, crude oil, mixed oil-water medium, trace sulfur & chloride impurities.
- Resists pitting, crevice corrosion at tank bottom sediment areas; anti-stress corrosion cracking (SCC) under cyclic sloshing load.
- Standard marine grade, works for outdoor, underground, ship fuel tanks long-term.
② Superior Weldability
- Matching welding wire: ER5183 / ER5356
- Weld joint retention rate ≥90% base metal strength, minimal softening after welding.
- Long continuous weld seams for large tank shells have low leakage risk, stable tightness for liquid storage.
③ Balanced Formability
H111 temper avoids over-hardness: easy bending, rolling, spinning tank elliptical heads, processing baffles, manholes, flanges.
No sagging or permanent deformation after forming unlike soft pure aluminum 1080A.
④ Good Fatigue & Vibration Resistance
High toughness, withstand long-period vibration from truck tankers, liquid sloshing impact; much longer service life than 1xxx pure aluminum.
Typical Application of 5083 Aluminum Plate
- Road transport oil tankers (diesel, gasoline, chemical light oil)
- Ship fuel tanks, offshore platform oil storage vessels
- Above-ground industrial fixed oil storage tanks
- Water & chemical liquid storage tanks, marine hull structures
- Pressure bearing equipment requiring corrosion resistance