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| We have been witnessing a rise in demand for special copper alloys with more demanding requirements. We have to be careful in meeting customers' needs and we must not deviate from their specifications in metallic industry as the present age of new technology progresses. A special aluminum-bronze alloy was developed by our founder, Dr. Shigeru Hagino, when he was with Mitsubishi Steel Mfg. in the 1940s. Many of the alloys developed during that period have made a big impact in the alloy industry in the past 65 years. |
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| Feature: |
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 Mechanical properties are good.
Excellent in wear resistance.
Excellent in anti-corrosion quality.
Excellent in fatigue resistance.
Small specific gravity
(specific gravity 7.5-7.6). |
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Special applications:
Our aluminum bronze is used in landing gears of airplanes. |
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| Principal applications: |
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Shafts
Bolts
Nuts
Springs
Connecting rods
Brackets
Various gears
Bearings
Liners
Pistons
Bushes
Joints
Valve cocks
Valve seats |
Pumps
Various machines
Non-magnetic bolts
Non-magnetic engine materials
Rotor wedges
Bushings for aircraft
Various materials for electric machine parts
Overhead wiring metal fittings for trains
Various materials for ships |
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New products:
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| HRW-1 |
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| We have developed a special aluminum-bronze alloy, HRW-1, the only one of its kind on the market. HRW-1 (Patent NO. 18919342) has over 640MPa in tensile strength, over 15% of elongation and has over HBW180 of hardness. Its characteristics include high mechanical strength and high wear resistance, and it is best suited for small abrasion-movement parts or parts that must withstand heavy load. |
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| HRW-3 |
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| HRW-3 is a wear-resistant aluminum copper alloy, and has high hardness, over HBW270 (10/3000) which is higher than that of HRW1. This material is good for forming rolls and finishing rolls or dies and molds for drawing purposes which require high hardness, anti-abrasion and smooth slipping. |
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| Material for bushings of landing gears and flap carriages |
The maintenance subsidiary of All Nippon Airways in Japan, ANA-NECO, has been purchasing our bars and pipes of various sizes (50 sizes) in the past 15 years with no quality problems and with no delivery delay. Fuji Heavy Industries also has been buying our products in the past 10 years.
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| 1. Special aluminum bronze, AMS4640F (Aerospace Material Specifications) |
| 2. Chemical composition: |
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| Al: 9.0-11.0 wt% |
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Ni: 4.0- 5.5 wt% |
| Fe: 2.0-4.0 wt% |
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Mn: max. 1.5wt% |
| Zn: max. 0.3 wt% |
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Sn : max. 0.2 wt% |
| Si : max. 0.25 wt% |
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Cu: Remainder |
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| 3. Mechanical properties (example of outside diameter 1-2 inch bar) |
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Tensile strength: min 110 ksi
Yield strength: min 60 ksi
Elongation: min 10%
Hardness: HB (10/3000) 201-248 |
| 4. Manufacturing process |
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Extrusion products:
melting castinghot extrusionheat-treatmentcuttingturninginspection (non-destructive testing of fluorescent penetrate inspection and ultrasonic test (UT)
Forge products:
meltingcastinghot forgingheat-treatmentcuttingturninginspection (nda of fluorescent penetrate inspection and UT) |
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