Global Certificate
ISO 9001 : 2015
| Alloy Name | |
| AMW - 33 | CuSn6 |
| IS/ISO | CuSn6 |
| DIN CEN/TS 13388 | CW452K |
| UNS | C51900 |
| JIS | C5191 |
| This alloy is as per ROHS specification | |
KEI Produces highest quality bronze strips in a thickness range from 0.1 mm to 3 mm in a slit width of 10 mm to 400 mm for Connectors , Electrical contacts , Spring elements & switches.
CuSn6 provides an excellent combination of strength, cold formability and hardness. It is wear resistant, has good corrosion resistance and soldering properties. Due to its high strength and good spring properties combined with good machining properties it is used for all kind of springs, Bourdon tubes or flexible metal tubes. Special characteristics such as superfine particle size or thermal- mechanical stress relieving improve mechanical properties and provide increased strength and greater malleability.
| Chemical Composition | Weight percentage |
| P | 0.03 - 0.35 % |
| Sn | 5.5 - 7.0 % |
| Pb | 0.02 Max. % |
| Zn | 0.30 Max % |
| Fe | 0.10 Max % |
| Cu | Remainder % |
| Main Applications |
| Electrical : Contact Springs,Electrical Flexing,Contact Bladers,Terminals,Switch Parts,Electrical Flexing |
| Fasteners : Lock Washers,Cotter Pins, Fasteners |
| Industrial : Textile Machinery,Perforated Sheets,Springs,Sleeve Bushing,Clutch Disks |
| General : Stamped parts,Connectors,Contact Springs,Spring Elements. |
| Physical Properties Typical values in annealed temper at 20 °C | ||
| Density | 8.80 | g/cm3 |
| Thermal expansion coefficient -191 .. 16 | 18.0 | 10-6/K |
| Specific heat capacity - 0 .. 300°C | 18.5 | 10-6/K |
| Thermal conductivity | 0.377 | J/(g•K) |
| Electrical conductivity (1 MS/m = 1 m/(O mm²) | 75 | W/(m•K) |
| Electrical conductivity (IACS) | 13 | MS/m % |
| Thermal coefficient of electrical resistance (0 .. 200 C) | 0.65 | 10-3/K |
| Modulus of elasticity ( 1 GPa = 1 kN/mm²) cold formed | 102 | GPA |
| Mechanical Properties (EN 1652) | ||||
| Temper | Tensile Strength Rm MPa(N/mm2) |
Yield Strength Rp0.2 MPa(N/mm2) |
Elongation A50mm % |
Hardness HV |
| O (SOFT) | 340 min | 300 | 50 Min | 90 Max |
| HA (Quater Hard) | 385 Min | 350 | 40 Min | 115 Min |
| HB (Half Hard) | 525 Min | 400 | 12 Min | 170 min |
| HD (Hard) | 620 min | 500 | 6 Min | 200 Min |
| HE (Extra Hard) | 695 Min | 590 | 4 Min | 215 Min |
| HS (Spring Hard) | 720 Min | 650 | 2 Min | 240 Max |