A4032 Aluminum Alloy Round Bar Supplier | 4032-T6 Forged Piston Alloy

Name: A4032 Aluminum Alloy Round Bar Supplier | 4032-T6 Forged Piston Alloy
Brand: Vertex Alloy
SKU: 2c7a61a0-fa4c-467c-ac99-66b0d9bfe94e

Aluminum AlloyBar/Rod

A4032 aluminum alloy round bar stock supplied by Shanghai Vertex Alloy Co., Ltd — 4032-T6 AlSi12CuNiMg forged piston alloy bars with low thermal expansion and high wear resistance.

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Description (English)

Shanghai Vertex Alloy Co., Ltd (Vertex Alloy) supplies A4032 aluminum alloy round bar (AA 4032 / UNS A94032 / EN AW-4032 AlSi12CuNiMg, similar to Chinese GB 4A11). 4032 is the classic forged piston alloy: 11.0–13.5% silicon delivers low thermal expansion, excellent wear resistance and stable strength at 250–300°C, making it the standard choice for high-performance and turbocharged engine pistons, racing motorcycle pistons and air-conditioning compressor swash plates. Supplied in T6 temper, Ø 8–250 mm, to ASTM B211 with EN 10204 3.1 certificates. Forged blanks and finished machined piston parts per drawing are also available. Contact us for the latest stock and pricing.

Size Range

Diameter Range:8–500 mm
Length:1,000–6,000 mm or cut-to-length available
OD±0.02；L+3mm
Temper: T6
Custom sizes and cut-to-length services are available upon request

Grade Specification

System	Value
USA (AA)	4032 / A4032
🇺🇸 UNS	A94032
Europe (EN)	EN AW-4032 / AlSi12CuNiMg
China (GB)	4A11 (LD11)
Typical Spec	ASTM B211 / B221

Chemical Composition

Element	Value
Si	11.0–13.5
Cu	0.50–1.3
Mg	0.50–1.3
Ni	0.50–1.3
Fe	≤ 1.0
Mn	≤ 0.20
Cr	≤ 0.10
Zn	≤ 0.25
Ti	≤ 0.25
Al	Balance

Mechanical Properties

Property	Value
Tensile Strength	≥ 380 MPa
Yield Strength	≥ 290 MPa
Elongation	≥ 5%
Hardness	≈ 120 HB
Fatigue Strength	≈ 110 MPa (5×10⁸ cycles)
Forging Temperature	410–470°C

Physical Properties

Property	Unit	Value
Item Value Density	-	2.70 g/cm³
Melting Range	-	570–580°C
Thermal Conductivity	-	155 W/(m·K)
CTE (20–100°C)	-	19.4 × 10⁻⁶ /K
Specific Heat	-	960 J/(kg·K)
Elastic Modulus	-	79 GPa
Electrical Conductivity	-	≈ 38% IACS

Applications

Automotive：Forged high-performance pistons
Automotive：Turbocharged engine pistons
Motorcycle：Racing pistons
Motorcycle:Two-stroke pistons
Compressors:AC compressor swash plates
Compressors:Compressor pistons
Marine:Outboard engine pistons
Power Sports:Snowmobile / ATV pistons
General:Hot-work components
General:Bearing sleeves