Business
The DOHO group operates in three broad areas. While keeping the sale of non-ferrous metals at our base, we keep creating new business in step with the times and with our customers' needs.
Materials
High-performance metals — copper, stainless steel, titanium, aluminium. Both strong and pliant, they are indispensable to turning leading-edge technology and design into products.
In the digital devices around us, from delicate internal components to beautifully formed casings, each part uses the metal best suited to its role.
Through the supply of these materials, we support manufacturing that underpins daily life and contributes to society.
Metals we handle
Pure copper
- Pure copper
- C1020 / C1100 / C1220
- Copper alloys
- Including Corson alloys — C7025 / C7035 / NKC164 / NKC286 / NKC4419 / EFTEC3 / EFTEC97 / EFTEC98 / EFCUBE820 / TAMAC194 / GOFC / NB109 / KFC / KLF5 / MSP1 / MSP5 / MSP8 / SCUR
Beryllium copper
- Beryllium copper
- C1720 / BeCu11 / BeCu7
Titanium copper
- Titanium copper
- C1990 / NKT180 / NKT322 / YCUT
Copper / zinc
- Brass
- C2600 / C2680 / C2801
Copper / tin
- Phosphor bronze
- C5191 / C5210 / C5102 / C5240 / C5212 / MF202
Copper / nickel / zinc
- Nickel silver
- C7521 / C7701
Copper / nickel / tin
- High-nickel
- GMX96
Stainless steel
- Austenitic
- SUS301 / SUS304 / SUS304L / SUS305M / SUS316
- Ferritic
- SUS430
- Martensitic
- SUS420J2
- Precipitation-hardening
- SUS631
Aluminum
- Pure & alloy aluminum
- A1050 / A1070 / A1100 / A1200 / A3003 / A5052 / A5257 / A6061
High-performance & special materials
- Pure nickel
- NW2201 (pure Ni)
- Low / high thermal-expansion alloys
- 42Ni (Alloy 42) / DK-CS (Kovar)
- Steel
- SUYP / SPCC / Silver Top / SPTE
Special materials, surface treatment & processed products
- Plating
- Tin plating (reflow / bright / semi-bright) / Gold plating (stripe / spot) / Silver plating (stripe / spot) / Nickel plating / Palladium plating
- Clad materials
- Various clad materials
Parts Machining
Seventy-odd years of knowledge and experience in non-ferrous metals, and a network of processing partners built through supplying those materials.
Making the most of that manufacturing network, we take on manufacturing services as a metals trader, to answer the wide range of needs in this field.
By combining our materials expertise with a network of processors in Japan and abroad, we drive open innovation — proposing cost reduction, faster development and procurement, and greater efficiency.
3D Printing & Equipment
Products in every field evolve daily with diversifying lifestyles and technological change. The manufacturing that supports them is at a major turning point.
Thinking together with our customers, we offer metal forming services centred on metal 3D printers. Geometries beyond conventional machining, and processes that do not depend on master craftsmen alone, will be essential to the manufacturing of the coming era.
Beyond supplying equipment, we deliver additive manufacturing as one service — from metal powder supply through to after-sales maintenance — drawing fully on what we have learned in materials.