Introduction
443.0 is a casting grade in the Aluminum-Silicon Alloy family, specified in ASTM B26/B26M. The specification defines its chemical composition and mechanical requirements for the applicable sand-casting tempers. Casting process options include Sand Casting, subject to the applicable specification and component requirements.
| Field | Value |
|---|---|
| Designation | 443.0 |
| Material Type | Aluminum Alloy |
| Sub Type | Aluminum-Silicon Alloy |
| Product Form | casting |
Manufacturing Process
Sand Casting
Equivalent Grades
N/A
Similar Materials
N/A
Reference Standards
| Standard | Standard Title | Edition | Specification | Identifier |
|---|---|---|---|---|
| ASTM B26/B26M | Standard Specification for Aluminum-Alloy Sand Castings | 05 | 443.0 | UNS A04430 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM B26/B26MEdition 05 · wt.% |
|---|---|
| Si | 4.5–6.0 |
| Fe | ≤ 0.8 |
| Cu | ≤ 0.6 |
| Mn | ≤ 0.50 |
| Mg | ≤ 0.05 |
| Cr | ≤ 0.25 |
| Zn | ≤ 0.50 |
| Ti | ≤ 0.25 |
| Al | remainder |
Chemical requirements[1]
Notes
ASTM B26/B26M · Edition 05
[1] Chemical composition: Other elements, total: ≤ 0.35 wt.%
Heat Treatment
ASTM B26/B26M–05 · F
F
Mechanical Properties
| Property | ASTM B26/B26MEdition 05 |
|---|---|
| Tensile Strength | ≥ 17.0 ksi / ≥ 115 MPa[1] |
| Yield Strength (Rp0.2) | ≥ 7.0 ksi / ≥ 50 MPa[1] |
| Elongation | ≥ 3.0 %[1] |
| Brinell Hardness | 40 HB[2] |
Notes
ASTM B26/B26M · Edition 05
[1] Tensile Strength/Yield Strength (Rp0.2)/Elongation: inch-pound; 2 in. or 4 x diameter / SI; 5 x diameter
[2] Brinell Hardness: inch-pound; 2 in. or 4 x diameter; 500 kgf; 10 mm; Typical hardness is for information only, not required for acceptance / SI; 5 x diameter; Typical hardness is for information only, not required for acceptance
Welding Conditions
N/A
Applications
At the material-family level, typical applications include custom, shaped aluminum sand-cast components for non-aerospace use. ASTM B26/B26M excludes aerospace applications; suitability of this grade must be checked against the component requirements and specified temper.
Last Updated: October 13, 2026