Material Comparison
Compare verified engineering materials side by side with condition-specific mechanical properties.
| Parameter | Silver 900 | Silver 800 |
|---|---|---|
| Material Family | Silver & Silver Alloys | Silver & Silver Alloys |
| Subfamily | Alloyed Silver | Alloyed Silver |
| UNS Designation | P07900 | — |
| ISO Designation | Ag900 | Ag800 |
| US-COIN Designation | Coin Silver 900 | — |
| DIN Designation | Ag900 | 2.3800 |
| EN Designation | AgCu10 | AgCu20 |
| SPECIFICATION Designation | ISO 9202 Fineness of Precious Metal Alloys | DIN 17510 Feinsilber und Silberlegierungen |
| FR-MINERVE Designation | — | 2nd Standard (800) |
| Element | Silver 900 | Silver 800 |
|---|---|---|
| Ag (Silver) | ≥ 90% | ≥ 80% |
| Cu (Copper) | 9.8 – 10% | 19.5 – 20% |
| Property | Silver 900 | Silver 800 |
|---|---|---|
| Density · TYPICAL · 20 °CUnit: g/cm³ | 10.31 g/cm³ | 10.15 g/cm³ |
| Mechanical Parameter | Silver 900Annealed (Soft) | Silver 800Annealed (Soft) |
|---|---|---|
| Modulus of Elasticity · TYPICALUnit: GPa | 83 GPa | 88 GPa |
| Yield Strength (0.2% Offset) · Strip & Wire · Annealed (Soft) · TYPICALUnit: MPa | ≥ 150 MPa | ≥ 200 MPa |
| Ultimate Tensile Strength · Strip & Wire · Annealed (Soft) · TYPICALUnit: MPa | ≥ 240 MPa | ≥ 300 MPa |
| Elongation at Break · Strip & Wire · Annealed (Soft) · TYPICALUnit: % | ≥ 26 % | ≥ 20 % |
| Property | Silver 900 | Silver 800 |
|---|---|---|
| Electrical Conductivity · TYPICAL · 20 °CCategory: ELECTRICAL • Unit: % IACS | 78 % IACS | 68 % IACS |
| Electrical Resistivity · TYPICAL · 20 °CCategory: ELECTRICAL • Unit: nΩ·m | 22.1 nΩ·m | 25.4 nΩ·m |
| Thermal Conductivity · TYPICAL · 20 °CCategory: THERMAL • Unit: W/(m·K) | 395 W/(m·K) | 365 W/(m·K) |
| Melting Range (Solidus-Liquidus) · RANGECategory: THERMAL • Unit: °C | 779–875 °C | 779–810 °C |
| Hardness Scale | Silver 900 | Silver 800 |
|---|---|---|
| HV Hardness · Annealed (Soft) · TYPICAL | 72–88 HV | 92–110 HV |
Machinability: Rated at approximately 50% relative to C36000. Chips break more easily than in sterling silver; suitable for automatic screw machining.
Weldability: Readily brazed; requires active brazing fluxes to prevent surface cuprous oxide formation.
Formability / Cold Working: Readily cold coined and stamped; exhibits moderate strain hardening requiring controlled reduction schedules.
Heat Treatment & Annealing: Solution heat treated at 740°C followed by quench; precipitation hardenable at 280°C to 300°C to achieve 135-155 HV.
Machinability: Rated at approximately 60% relative to C36000. Clean chip evacuation; excellent machinability among silver alloys due to two-phase Cu-rich eutectic structure.
Weldability: Brazed with low-melting silver-copper-phosphorus or silver-copper-zinc fillers; close proximity of melting range (779°C-810°C) requires precise temperature control during joining.
Formability / Cold Working: Lower cold ductility than high-fineness silvers; requires intermediate annealing for heavy reductions.
Heat Treatment & Annealing: Annealed at 550°C to 600°C for 20 minutes; significant age-hardening response reaching up to 185 HV.