KUPTİN® R7
Red Bronze | CuSn7Zn4Pb7 | Rg7
KUPTİN® R7 is a Red Bronze | CuSn7Zn4Pb7 | Rg7 grade for bushings, bearings, rods, tubes, plates, and wear-resistant industrial components.
ISO:
CuSn7Zn4Pb7
DIN:
EN 1982
ASTM:
C93200/ SAE 660
EN:
CC493K / CB493K
01. Chemical Composition (%)
science
Copper
(Cu)
%81.0-85.0
Tin
(Sn)
%6.0-8.0
Zinc
(Zn)
%2.0-5.0
Lead
(Pb)
%5.0-7.0
Nickel
(Ni)
% 2.0 Max
02. Industries Served
factory
oil_barrel
Oil & Gas
Drilling Equipment
precision_manufacturing
Automotive
Bushings
wind_power
Energy
Turbines
sailing
Maritime & Defense
Propulsion Systems
flight_takeoff
Aerospace
Landing Gear
03. Supply Forms
inventory_2
transition_fade
Custom Casting
radio_button_unchecked
Hollow Bar / Pipe
sort
Flat Bar / Plate
stroke_full
Round Bar
04. Mechanical Properties
engineering| Property Name | Imperial (psi) | Metric (MPa) | Test Method |
|---|---|---|---|
| Tensile Strength | - | 230-260 N/mm² | - |
| Yield Strength | - | 110-120 N/mm² | - |
| Hardness | 60-70 HB | 60-70 HB | - |
| Density | - | 8,8 g/cm³ | - |
05. Areas of Use
settings_suggest| Hydraulic and Pneumatic Systems: Used for hydraulic cylinder parts and fittings because of its superior sealing capabilities and pressure resistance. | |
| Valve and Fitting Components: Preferred for valve bodies and internal components (stems, seat rings) in water and steam lines due to high corrosion resistance. | |
| Automotive and Rail Systems: Used in linkage bushings and friction plates thanks to its moderate load-bearing capacity and good sliding characteristics. | |
| Marine Engineering: Reliably used for external boat hardware and internal piping components due to its durability against seawater. | |
| Machine Tools: Serves as protective wear plates or guide bushes for CNC and manual machines where continuous friction occurs. | |
| Paper and Textile Industry: Utilized in roller bearings and gear components that must withstand chemical corrosion and continuous operational cycles. |
06. Global Equivalent Grades
public| Region | Standard | Grade Definition | Notes |
|---|---|---|---|
| flag Europe | EN | CuSn7Zn4Pb7-C | Casting |
| flag Europe | EN | CuSn7Zn4Pb7-B | Ingot |
| flag Europe | EN | CC493K | Casting |
| flag Europe | EN | CC493K | Ingot |
| flag USA | ASTM | C93200 | |
| flag Germany | DIN | CuSn7ZnPb | |
| flag Germany | DIN | RG 7 | |
| flag Japan | JIS | BC3 | |
| flag Türkiye | Brand Name | KUPTİN R7 | Çorum Bronz |
| flag Global | Trade | RG 7 | Common Usage |
07. Technical Resources
folder_open08. Standard Compliance
verified_user
EN
EN 1982
ASTM
C93200
DIN
RG 7
JIS
JIS H 5401
Türkiye
KUPTİN R7
Long Notes
note_altKUPTİN® R7 technical data
KUPTİN® R7 is available for custom casting, continuous casting, centrifugal casting, machining, and industrial spare-part production.