C355.0 Aluminum-Silicon Alloy Casting Material
Aluminum-Silicon Alloy
Introduction
C355.0 is an aluminum-silicon alloy grade covered by ASTM B26/B26M. Typical applications include crankcases, engine blocks, flywheel housings and transmission cases.
| Field | Value |
|---|---|
| Designation | C355.0 |
| 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 | C355.0 | UNS A33550 |
Related Casting Products
Physical Properties
N/A
Chemical Composition
| Element | ASTM B26/B26MEdition 05 · wt.% |
|---|---|
| Si | 4.5–5.5 |
| Fe | ≤ 0.20 |
| Cu | 1.0–1.5 |
| Mn | ≤ 0.10 |
| Mg | 0.40–0.6 |
| Zn | ≤ 0.10 |
| Ti | ≤ 0.20 |
| Al | remainder |
Notes
ASTM B26/B26M · Edition 05
[1] Chemical composition: Other elements, each: ≤ 0.05 wt.%
[2] Chemical composition: Other elements, total: ≤ 0.15 wt.%
Heat Treatment
ASTM B26/B26M–05 · Sand Casting · T6 · Recommended heat treatment
Notes
ASTM B26/B26M · Edition 05
[1] 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.
[2] T6, T6 · Recommended heat treatment: room temperature; 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).; Stress relieve for dimensional stability: hold at 775 ± 25°F for 5 h; furnace cool to 650°F for 2 or more h; furnace cool to 450°F for not more than 3/4 h; furnace cool to 250°F for approximately 2 h; cool to room temperature in still air outside the furnace.; No quenching required. Cool in still air outside the furnace.; ±5°C; Stress relieve for dimensional stability: hold at 415 ± 15°C for 5 h; furnace cool to 345°C for 2 or more h; furnace cool to 230°C for not more than 3/4 h; furnace cool to 120°C for approximately 2 h
[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).; Stress relieve for dimensional stability: hold at 775 ± 25°F for 5 h; furnace cool to 650°F for 2 or more h; furnace cool to 450°F for not more than 3/4 h; furnace cool to 250°F for approximately 2 h; cool to room temperature in still air outside the furnace.; No quenching required. Cool in still air outside the furnace.; ±5°C; Stress relieve for dimensional stability: hold at 415 ± 15°C for 5 h; furnace cool to 345°C for 2 or more h; furnace cool to 230°C for not more than 3/4 h; furnace cool to 120°C for approximately 2 h
Mechanical Properties
Core Mechanical Properties
ASTM B26/B26M — 05 · Table 2 — Normative
ASTM B26/B26M — 05 · Table 2 — Informative
| Property | T6 |
|---|---|
| Brinell Hardness | 80 HB[2] |
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
Welding Conditions
N/A
Applications
Aluminum-silicon alloy ASTM B26/B26M C355.0 is used for crankcases, engine blocks, flywheel housings and transmission cases. Other documented non-aerospace examples include electric-motor parts, valve bodies, impellers and water jackets. Other cast components used in this material family include engine-related castings, 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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