319.0 Aluminum-Silicon Alloy Casting Material
Aluminum-Silicon Alloy
Introduction
319.0 is an aluminum-silicon alloy grade covered by ASTM B26/B26M. Typical applications include cast crankcases, bearing blocks, diffusers, discharge casings and a variety of brackets, housings and covers.
| Field | Value |
|---|---|
| Designation | 319.0 |
| Material Type | Aluminum Alloy |
| Sub Type | Aluminum-Silicon Alloy |
| Product Form | casting |
Manufacturing Process
Sand Casting
Equivalent Materials
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 | 319.0 | UNS A03190 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM B26/B26MEdition 05 · wt.% |
|---|---|
| Si | 5.5–6.5 |
| Fe | ≤ 1.0 |
| Cu | 3.0–4.0 |
| Mn | ≤ 0.50 |
| Mg | ≤ 0.10 |
| Ni | ≤ 0.35 |
| Zn | ≤ 1.0 |
| Ti | ≤ 0.25 |
| Al | remainder |
Chemical requirements[1]
Notes
ASTM B26/B26M · Edition 05
[1] Chemical composition: Other elements, total: ≤ 0.50 wt.%
Heat Treatment
ASTM B26/B26M–05 · Sand Casting · T5 · Recommended heat treatment
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Recommended: Precipitation heat treatment | 400 °F / 205 °C; Holding time: 8 h[1] | Still air outside furnace |
ASTM B26/B26M–05 · Sand Casting · T6 · Recommended heat treatment
Notes
ASTM B26/B26M · Edition 05
[1] T5, T5 · Recommended heat treatment: Source: ASTM B917/B917M–25 (Recommended; when specified by the material specification or purchase order).; ±10°F; Use suitable metal-temperature measurement; sections/microstructure affect soak time selection (7.2).; No quenching required. Cool in still air outside the furnace.; ±5°C
[2] T6, T6 · Recommended heat treatment: Source: ASTM B917/B917M–25 (Recommended; when specified by the material specification or purchase order).; ±10°F; Use suitable metal-temperature measurement; sections/microstructure affect soak time selection (7.2).; Quench in water at 150 to 212°F except as noted.; Time at solution temperature may be increased for section thickness over 1 in.; ±5°C; Quench in water at 65 to 100°C except as noted.; Time at solution temperature may be increased for section thickness over 25 mm.
[3] T6, T6 · Recommended heat treatment: Source: ASTM B917/B917M–25 (Recommended; when specified by the material specification or purchase order).; ±10°F; Use suitable metal-temperature measurement; sections/microstructure affect soak time selection (7.2).; No quenching required. Cool in still air outside the furnace.; ±5°C
Mechanical Properties
Core Mechanical Properties
Conditions are not identical. Compare each stated condition and applicability separately.
ASTM B26/B26M — 05 · Table 2 — Normative
ASTM B26/B26M — 05 · Table 3 — Normative
Notes
ASTM B26/B26M · Edition 05
[1] Tensile Strength/Yield Strength (Rp0.2)/Elongation: inch-pound; 2 in. or 4 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
[3] Tensile Strength/Yield Strength (Rp0.2)/Elongation: SI; 5 x diameter
[4] Brinell Hardness: SI; 5 x diameter; 500 kgf; 10 mm; Typical hardness is for information only, not required for acceptance
Welding Conditions
N/A
Applications
Aluminum-silicon alloy ASTM B26/B26M 319.0 is used for cast crankcases, bearing blocks, diffusers, discharge casings and a variety of brackets, housings and covers. Other cast components used in this material family include engine-related castings, transmission cases, motor housings and pump parts. Applications include automotive and industrial machinery, original equipment manufacture, repair and replacement supply.
The specified alloy, temper and sand-casting purchase scope remain applicable; general automotive examples do not confer aerospace or safety-critical approval.
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Email Us for a QuoteLast Updated: November 6, 2026