Year 2009 "Grant for supporting product development by small manufacturing businesses"Experimental results
Understanding the metal mold castability and material properties for the Permanent mold casting technique used for lead-free and cadmium-free brass material-an environmentally friendly new material-and establishing Permanent mold casting mass production technology for casting parts made from this material.
Thistrial production experiment was planned and conducted by Kitamura Faucetutilizing government projects for supporting trial production and development.
Environmentallyfriendly copper alloy material withconsideration of Pb and Cd contents is already on the market.Wewill continue to search for beneficial methods for utilization of environmentally friendly materials, with a focus onproduction method as well as on materials.
Material purchase place and cooperation company.
| Materialnames | Cooperatingcompany names |
|---|---|
| Eco-brass (CDA C87850 ECO BRASS) | MitsubishiShindoh Co.,Ltd. |
| Eco-bismuth (CDA C89841 Copper-Bismuth Alloy) | JoetsuBronz1 corporation |
| Eco-bronze (silicon bronze) | JoetsuBronz1 corporation |
| BZ (CDA C49340 Bismuth Brass Alloy) | SAN-ETSUMETAL Co., Ltd |
| KEEPALLOY Brass alloy keep with no dezincing resistance (Bi-Se Yellow brass) | KITZMETAL WORKS CORPORATION |
| KEEPALLOY Brass alloy keep with dezincing resistance (bismuth brass) | KITZMETAL WORKS CORPORATION |
| C87800Silicon Brass US standard material ASTM C87800 | JoetsuBronz1 corporation |
| Commonbrass for CAC203 Permanent mold casting (ASTM C85700 Leadedyellow brass) | – |
Experimental subject, materials
Trial product: Ball for ball valve
Details of trial products
Sphere diameter(A)
Φ104mm(Casting conditions)
Φ102mm(After machine processing)
Fluid passage(B)
Φ63mm(Casting conditions)
Φ65mm(After machine processing)
Thickness setting
True trial production
Raw casting t=3.8mm
After processing t= 2.5mm
Preliminary trial production
Raw casting t=4.7mm
After processing t= 3.7mm
Permanent mold casting method
Gravity Permanent mold casting method
Subject materials
- Six types of lead-free and cadmium-free brass material, which are commercially available and environmentally friendly new materials
- One type of lead-free, cadmium-free brass registered in US standard
- One type of lead-free, added to subject material for comparison to common brass material commonly used in Permanent mold casting
| Materialnames | Domesticstandard in Japan | USstandard/Registered name, etc. |
|---|---|---|
| M1.Eco-brass (CDA C87850 ECO BRASS) | JIS CAC 804 | CDA C87850 ECO BRASS |
| M2.Eco-bismuth (CDA C89841 Copper-Bismuth Alloy) | – | CDA C89841 Copper-Bismuth Alloy |
| M3.Eco-bronze (silicon bronze) | – | – |
| M4.BZ (CDA C49340 Bismuth Brass Alloy) | *JIS C6802 | CDA C49340 Bismuth Brass Alloy |
| M5.KEEPALLOY Brass alloy keep with no dezincing resistance (Bi-Se Yellow brass) | C6803 | – |
| M6.KEEPALLOY Brass alloy keep with dezincing resistance (bismuth brass) | – | – |
| M7.C87800 Silicon Brass US standard material ASTM C87800 | – | ASTM C87800 Silicon Brass |
| M8.Commonbrass for YBPM Permanent mold casting (ASTM C85700 Leadedyellow brass) | Equivalentto CA C203 | ASTM C85700 Leaded yellow brass |
| *Newlystandardized in JISH3250 modified on May 20, 2010.Subjectmaterials do not have JIS certification at the time this document was prepared(July, 2010), but are indicated as JIS because JIS certification will beobtained in the future. | ||