Al 95%
95% aluminum in donut form for deoxidation and degassing processes in the steel industry.
Al 95% is manufactured specifically as a deoxidation material for the steel industry. It is produced in donut form (~1 kg) fed directly into liquid steel to remove dissolved oxygen. The 95% aluminum content is sufficient for effective degassing, with the balance composed primarily of silicon and iron.
International Nomenclature
| Standard | Designation |
|---|---|
| Comercial | Al 95 / Aluminio 95% |
| Uso | Donas de desgasificación |
Chemical Composition
| Element | Symbol | Percentage |
|---|---|---|
| Aluminum | Al | ≥95.0% |
| Silicon | Si | ≤2.5% |
| Iron | Fe | ≤2.0% |
| Others (total) | — | ≤0.5% |
Physical Properties
| Property | Value |
|---|---|
| Density | 2.70 g/cm³ |
| Melting Point | ~650 °C |
| Weight per donut | ~1 kg |
Mechanical Properties
| Property | Value |
|---|---|
| Use | Consumible — se funde en acero líquido |
Key Characteristics
- Designed for removal of dissolved oxygen in liquid steel
- Donut form allows controlled and consistent feeding
- Manufactured from secondary aluminum, keeping cost competitive
- 95% aluminum is effective for deoxidation without adding excessive traces
Industries & Applications
Steel Industry
Liquid steel deoxidation, aluminum adjustment in killed steels, degassing
Metallurgy
Aluminum additions in metallurgical processes, thermite for aluminothermic welding
Special Notes
Al 95% donuts are a key product for our steel industry customers. The donut form facilitates furnace feeding and allows precise control of aluminum dosing in steel. We manufacture to the customer's exact specification.
Frequently Asked Questions
What is Al 95% and what is it used for?
Al 95% is a deoxidation aluminum of minimum 95% grade, manufactured specifically for the steel industry. It is produced in donut form of about 1 kg that is fed directly into liquid steel to remove dissolved oxygen. Its main applications are steel deoxidation and degassing, aluminum adjustment in killed steels, and metallurgical additions such as thermite for aluminothermic welding.
What is the chemical composition of Al 95% and what does each element do?
Al 95% contains a minimum of 95.0% aluminum, with silicon ≤2.5%, iron ≤2.0%, and other elements ≤0.5% total. Aluminum is the active agent that reacts with the oxygen dissolved in the steel to form aluminum oxide (alumina), which floats off as slag. Silicon and iron make up the balance and come from the feedstock; their level is kept controlled so as not to add excessive traces to the steel.
Why is it made in donut form and how much does each one weigh?
Each Al 95% donut weighs about 1 kg. The donut form facilitates furnace feeding and allows controlled, consistent dosing of aluminum into the liquid steel. This gives the operator precise control over the amount of deoxidizer added in each addition, which is key in steelmaking processes.
Is Al 95% cast like a normal aluminum part, or is it a consumable?
Al 95% is not a casting alloy for producing parts; it is a consumable product that melts into the liquid steel. It has no heat treatments or tempers (T5/T6, etc.) because it is not formed into a structural component. Its density is 2.70 g/cm³ and it melts at around 650 °C, so it dissolves quickly when fed into the steel bath.
What feedstock is Al 95% made from and why does it matter?
Al 95% is manufactured from secondary (recycled) aluminum, which keeps its cost competitive against higher-purity alternatives. The 95% aluminum level is sufficient for effective deoxidation without adding excessive traces to the steel. At Transformación Puebla we manufacture the donuts to the customer's exact specification.
What is the difference between Al 95% and Al 99.5%?
Both are deoxidizers for the steel industry, but they differ in purity. Al 95% (≥95% Al) is the more economical and effective option for general deoxidation. Al 99.5% (equivalent to grade 1050/1050A) offers higher purity with less silicon and iron, and is used when producing special, stainless, or tool steels where the incorporation of traces into the steel must be minimized. Al 99.5% is a compromise between Al 95% (more economical) and primary aluminum (higher purity).
Need Al 95%?
We manufacture this alloy in ingots, donuts, and bars to your exact specifications.