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Special copper alloys
Copper chromium
Copper beryllium
Aluminum-bronze alloy
Special high-strength brass
NC alloys (colson system alloys)
ENC25
ENC50
Alloy Data Sheets
Metal cavity productions
Precision castings
Pressure castings
ISO9001F2008 Certified
 
Aluminum-bronze alloy
 
  OUTLINE
 
As the metals industry evolves, we are witnessing a rise in demand for special copper alloys with more strenuous requirements. To meet our customers' needs, we've developed several aluminum bronze alloys with excellent mechanical properties. The first of these was developed by our founder, Dr. Shigeru Hagino, when he was with Mitsubishi Steel Manufacturing in the 1940s. His aluminum bronze would make a major impact in the industry over the next 70 years, and marked the start of Yamato Gokin's history as a special copper alloy manufacturer. aluminum bronze
 
Feature:
 
Good mechanical properties.
Excellent wear resistance.
Excellent anti-corrosion quality.
Excellent fatigue resistance.
Small specific gravity
     (specific gravity 7.5-7.6).
  Special applications:
Our aluminum bronze is used in landing gears of airplanes.
 
Principal applications:
 
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
Aluminum copper
     
New products:

   
HRW-1 aluminum bronze
 
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 tensile strength, over 15% elongation and over HBW180 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.  
   
HRW-3
 
HRW-3 is a wear-resistant aluminum copper alloy that has high hardness, over HBW270 (10/3000), which is higher than that of HRW1. This material is good for roll forming and roll finishing, as well as dies or molds for drawing purposes which require high hardness, anti-abrasion and smooth slipping.
 
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 has also been buying our products in the past 10 years.
 
1. Special aluminum bronze, AMS4640H (Aerospace Material Specifications)
2. Chemical composition:
  
Al: 9.0-11.0 wt%      Ni: 4.0- 5.5 wt%
Fe: 2.0-4.0 wt% Mn: max. 1.5wt%
Zn: max. 0.3 wt% Sn : max. 0.2 wt%
Si : max. 0.25 wt% Cu: Remainder
3. Mechanical properties (for bars of 1 to 2 inches outer diameter)
  Tensile strength: min 110 ksi
Yield strength: min 60 ksi
Elongation: min 10%
Hardness: HB (10/3000) 201-248
4. Manufacturing process
  Extruded products:
meltingcastinghot extrusionheat treatmentcuttingturninginspection (non-destructive testing via fluorescent penetrant inspection and ultrasonic test (UT)
Forged products:
meltingcastinghot forgingheat treatmentcuttingturninginspection (NDT via fluorescent penetrate inspection and UT)
 
 
 
 
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YAMATOGOKIN.CO. LTD.
474,Kamitome,Miyoshi-machi,Iruma-gun,Saitama,354-0045 Japan,
Phone : 81-49-273-6006 FAX : 81-49-273-6016
E-MAIL : info3@yamatogokin.com
MIYOSHIGOKINKOGYO CO. LTD.
508 Kamitome,Miyoshi-machi,Iruma-gun,Saitama-ken, 354-0045 Japan
Phone : 81-49-258-3381 FAX : 81-49-258-5279

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