HIDURAX^® 1

ALLOY TYPE	HIDURAX^®
ALLOY NAME	HIDURAX^® 1

HIDURAX 1 is a complex nickel-aluminium bronze possessing good mechanical strength and hardness, and advantageous ductility, corrosion resistance and wear resistance. The alloy’s excellent properties are maintained at elevated temperatures and it possesses very good resistance to oxidation. Also of benefit, are HIDURAX 1’s superior bearing properties and fatigue strength.

Basic Properties - Mechanical Properties

0.2% Proof Stress (N/mm² )[ksi] minimum	245-530 [35.5-76.8]
Ultimate Tensile Strength (N/mm²) [ksi] minimum	620-805 [90.0-116.7]
Elongation (%) minimum	10-17
Hardness (HBN)	179-240
Impact (J)[ft lb]	16.5-40.5 [12-30]

Alloy Features

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	Superior strength, some forms being comparable to medium carbon steels

	High corrosion resistance in marine environments

	Excellent resistance to cavitation erosion

	High wear resistance

	Strength and hardness retained to a marked degree up to 400°C

	Resistant to high temperature scaling up to 1000°C

	Resistance to fatigue

	Good damping properties

	Good machinability

	Fully weldable

Chemical Specification

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Elements	Al	Cu	Fe	Mg	Mn	Ni	Pb	Si	Sn	Zn
Minimum	8.00	REMAINDER	2.00			3.50
Maximum	11.00		6.00	0.10	0.50	6.00	0.05	0.25	0.20	0.50

Physical Properties

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Density (Kg.m^-3)	7500
Magnetic Permeability	1.5
Young’s Modulus (N/mm²)	128 x 10³
Modulus of Rigidity (N/mm²)	48 x 10³
Electrical conductivity, 20°C	8% IACS
Electrical resistivity, 20°C (µ.Ω.m)	2.2 x 10-7
Thermal conductivity, 20°C (W.m^-1.°K^-1)	42
Mean coefficient of thermal expansion, 20-300°C (°K^-1)	17.6 x 10^-6

Specifications

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	BS B23

	BS 2872/4 CA104

	BS EN CW307G

	DTD 197A

	DEF STAN 02-833

	NES 833 Part 2

	DGS 8452A

	DGS 1043

	QQ-C-465

	ASTM B150 C63200

	ASTM B150 C63000

	DTD 412BS 1400 AB2

	BS EN CuAl10Fe5Ni5

	AMS 4640

Applications

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Pump Shafts
Valve Stems and trim
Flanges and pipe fittings
Fasteners
Bearings & bushes
Gears
Worm Wheels
Marine Propeller shafts
Springs
Wear plates
Deep drawing dies
Thrust washers

Machining Advice

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Operation	Cutting Speed m/min (ft/min)	Feed Rate mm/rev (in/rev)	Depth of cut mm (in)
Milling	30-60 [100-200]	0.25 mm/tooth 0.010 in/tooth	3.0-6.0 (0.10-0.25)
Drilling	15-40 [50-130]	0.075-0.5 [0.003-0.02]
Turning - Roughing	30-60 [100-200]	0.25 mm/rev 0.010 in/rev	3.0-6.0 (0.10-0.25)
Turning - Finishing	120-180[400-600]	0.12 [0.005]	0.12-0.25(0.005-0.010)
Tips	Carbide tipped using water-soluble lubricant

Alloy Comparisons	HIDURAX 1	BS 970 070M55 Medium Carbon Steel	316 StainlessSteel	S32550 Superduplex Stainless Steel
Strength (0.2% Proof Stress, N/mm²), minimum	400	355	205	550
UTS	700	700	515	760
Cavitation erosion rate (mm³/h) in fresh water	0.6	>4	1.7	Good
Electrical Resistivity (Ω.m)	1.7 x 10^-7	10 x 10^-7	7.5 x 10^-7	9.2 x 10^-7
Thermal Conductivity (W.m^-1.°K^-1)	42	13.4	16.2	14.2

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HIDURAX® 1

HIDURAX^® 1