BC7 Chemical Composition (JIS CAC407 / ASTM C92200)

Material Name

JIS: BC7

Current JIS Symbol: CAC407

Material Type: Leaded Tin Bronze Casting (Gunmetal Bronze)

Standard Type

Standard Grade
JIS BC7 / CAC407
ASTM C92200
UNS C92200
CNS BC7
DIN CuSn7Zn4Pb2-C
EN (ตรวจสอบเพิ่มเติมก่อนใช้อ้างอิง)

 

Chemical Composition

Element %
Cu 86.0–90.0
Sn 5.0–7.0
Zn 3.0–5.0
Pb 1.0–3.0
Fe ≤0.2
Ni ≤0.8
Sb ≤0.2
P ≤0.03
Si ≤0.005
Al ≤0.005

 

4. Mechanical Properties

Property Value
Tensile Strength ≥216 MPa
Elongation ≥18%

 

5. Typical Features

  • Good Castability
  • Good Machinability
  • Good Corrosion Resistance
  • Good Wear Resistance
  • Good Pressure Tightness

 

6. Typical Applications

  • Pump Parts
  • Pump Impeller
  • Valve
  • Bearing
  • Bush
  • Gear
  • Marine Components
  • Bronze Castings