Osaka Alloying Works Co., Ltd.

Osaka Alloying Works Co., Ltd. is a Japanese company that manufactures master alloys and copper alloy industrial materials. Founded through individual operations begun in 1935 in Osaka and incorporated in 1949, it relocated its head office registration to Fukui in 1989. The company states it holds a 100% domestic production share for phosphorus master alloys and supplies copper industry companies in Japan and overseas. It also produces copper alloy castings and processed products, including bronze for superconducting wire and OM Alloy wear-resistant copper alloy castings.

The company's origins trace to June 1935, when first president Densuke Mitani began manufacturing copper alloy castings and master alloys as an individual business in Osaka. In July 1949, Osaka Alloying Works Co., Ltd. was established with capital of 5 million yen. In June 1961, capital was increased to 6 million yen and the Ibaraki Plant was built in Ibaraki City, Osaka Prefecture. In January 1975, the raw material for phosphor copper ingots was switched from red phosphorus to yellow phosphorus. In April 1984, a patent was obtained for a phosphor copper ingot manufacturing apparatus and method. In October 1987, the head office plant was relocated to Technoport Fukui in Fukui City and the Ibaraki Plant was closed. In July 1989, the head office registration was moved to Technoport Fukui, making it a Fukui-based company. The company states that in 1970 it established a manufacturing method for phosphorus master alloys using yellow phosphorus, which self-ignites at 30°C, and that it remains the only company in Japan capable of adding phosphorus to metals. In 1984 it developed and patented the Mizuta-style melting method, which uses a water shower for rapid cooling to produce copper alloy of uniform concentration.

A master alloy manufacturer positioned as an upstream source of industrial materials, with a stated 100% domestic share in phosphorus master alloys and unique domestic capability in adding phosphorus to metals.

• Master alloys

  Copper-based, phosphorus-based, and other master alloys used as industrial materials across various fields.

• Phosphorus master alloys

  Master alloys based on copper, iron, nickel, and tin; the company states a 100% domestic production share.

• OM Alloy (wear-resistant copper alloy)

  Wear-resistant copper alloy castings used as mold material for forming stainless steel, titanium, and other materials.

• Copper alloy ingots

  Cylindrical billets of 4 to 500 kg class produced by the company's special Mizuta-style melting method.

• Bronze for superconducting wire

  Titanium-added bronze for niobium-tin (Nb3Sn) superconducting wire used in nuclear magnetic resonance (NMR) equipment.

• Cymbal blanks

  Blanks for cymbals manufactured by the company.

1. 1大阪合金工業所 - りん合金・母合金・産業資材の製造メーカーosakagokin.co.jp
2. 2会社案内 - 合金・産業資材・製造の大阪合金工業所osakagokin.co.jp
3. 3製品紹介 - 合金・産業資材・製造の大阪合金工業所osakagokin.co.jp