Aluminium Silicon Bronze AMS 4631 (UNS C64200)


Technical Data Sheet

Chemical Composition Limits
Weight % Cu Al As Fe Pb Mn Ni Si Sn Zn
AMS 4631
Rem 6.3 - 7.6 0.09 0.3 0.05 0.10 0.25 1.5 - 2.2 0.20 0.50

AMS 4631 (UNS C64200) Silicon aluminum bronze combines the self lubricity of the silicon with the higher mechanical properties of aluminum bronze and is sometimes used in place of C63000 where specifications permit. C64200 is free-machining and has good anti-galling and anti-seizing properties. Typical applications involve valve stems, gears, marine and pole line hardware, wing pylons, bolts, nuts, bushings and valve body components.

Typical Mechanical Properties

Material Size

Tensile Strength ksi

Yield Strength ksi Elongation 4D %
AMS 4631 <0.5" 90 45 9
AMS 4631 0.5" - 1.00" 85 45 12
AMS 4631 1.00" - 2.00" 80 42 12
AMS 4631 2.00" - 3.00" 75 35 15

Physical Properties - AMS 4631
Melting Point - Liquidus - 1840 F
Melting Point - Solidus - 1800 F
Density - 0.278 lb/in3 at 68 F
Specific Gravity - 7.69
Electrical Resistivity - 113.0 ohms-cmil/ft @ 68 F
Electrical Conductivity - 8 %IACS @ 68 F
Thermal Conductivity - 26.0 Btu · ft/(hr · ft2·oF)at 68F
Coefficient of Thermal Expansion - 10.0 ·10-6 per oF (68-572 F)
Specific Heat Capacity - 0.09 Btu/lb/oF at 68 F
Modulus of Elasticity in Tension - 16000 ksi
Modulus of Rigidity - 6000 ksi
Machinability Rating - 60

Availability
Sizes available: AMS 4631 & AMS 4634
SOLID BAR 3/16” - 8” diameter
HEX BAR 5/8" - 2 1/2
For all other stock availability contact Sales.

Specifications

CA107
BS 2872
BS 2874
DGS 8453A
DGS 1044
NES 834
CW301G
CW302G
DELTA CA10
DELTA CA12
AMS 4631
AMS 4634
ASTM B124
ASTM B150
ASTM B249
ASME SB150
SAE J463
SAE J461
BS EN12163
BS EN12164
BS EN12165
BS EN12167
BS EN12420
CuAl7Si2

Typical Uses of Aluminium Bronze AMS 4631
Aerospace - Landing Gear Bushings & Bearings, Valve Guides, Stems,and Seats
Other Industrial - Corrosion Resistant Parts, Wear Rings, Machine Tool Parts,Piston Guides, Worm Wheels, Hot Mill Gurdes
Marine - Propeller Hubs, Wear Rings, Hardware, Worm Gears, Shafts, Sleeves.

Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.