Precious Metal IC-Ag99.99-O (Annealed)
Temper
Choose for deep drawing, chasing, bonding wire and maximum electrical conductivity.
Values for the O condition
Other IC-Ag99.99 tempers and conditions
IC-Ag99.99 is listed in 3 conditions; see the grade overview at IC-Ag99.99.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
OThis page Annealed | Choose for deep drawing, chasing, bonding wire and maximum electrical conductivity. | 55 | 150 | 48 | 26 HB | 106 % IACS |
Half hard | Compromise temper for stamped contacts and jewellery parts needing some stiffness with residual bendability. | 175 | 235 | 12 | 58 HB | 104 % IACS |
Full hard | Use for spring-like wire, hard-drawn conductor and parts that must hold shape without heat treatment. | 270 | 310 | 4 | 82 HB | 103 % IACS |
What is IC-Ag99.99-O?
IC-Ag99.99-O is IC-Ag99.99 in the O temper — choose for deep drawing, chasing, bonding wire and maximum electrical conductivity. IC-Ag99.99-O has a yield strength of 55 MPa (7.98 ksi) and a tensile strength of 150 MPa (21.8 ksi) — weaker than 95% of precious metal grades. Elongation at break is 48% and the elastic modulus is 76 GPa (11 Msi). IC-Ag99.99-O has a density of 10.49 g/cm³ (0.379 lb/in³), heavier than 55% of precious metal grades. It melts at 962°C (1,763 °F).
Advantages
- Ductile — tolerates forming and impact — 48%, better than 100% of precious metal grades
- Conducts heat well — 429 W/m·K (247.9 BTU/hr·ft·°F), better than 100% of precious metal grades
- High electrical conductivity — 106 % IACS, better than 100% of precious metal grades
- Forms and bends easily — 99/100, better than 99% of precious metal grades
- Polishes to a fine finish — 95/100, better than 86% of precious metal grades
Limitations
- Low stiffness — 76 GPa (11 Msi), worse than 96% of precious metal grades
- Low strength — 55 MPa (7.98 ksi), worse than 95% of precious metal grades
IC-Ag99.99-O properties
Typical room-temperature values for IC-Ag99.99-O; 11 are specific to this condition. Other listed values are IC-Ag99.99 reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
IC-Ag99.99-O has a density of 10.49 g/cm³ (0.379 lb/in³), heavier than 55% of precious metal grades. It melts at 962°C (1,763 °F).
Mechanical12
IC-Ag99.99-O has a yield strength of 55 MPa (7.98 ksi) and a tensile strength of 150 MPa (21.8 ksi) — weaker than 95% of precious metal grades. Elongation at break is 48% and the elastic modulus is 76 GPa (11 Msi).
Thermal6
IC-Ag99.99-O is rated for continuous service to 500°C (932 °F). It conducts heat at 429 W/m·K (247.9 BTU/hr·ft·°F), better than 100% of precious metal grades. Thermal expansion is 19.5 µm/m·K (10.8 µin/in·°F).
Electrical3
IC-Ag99.99-O conducts electricity at 106 % IACS, better than 100% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), worse than 56% of precious metal grades.
Sustainability4
Producing a kilogram of IC-Ag99.99-O takes about 1,500 MJ of energy and emits 110 kg of CO₂ — more than 51% of precious metal grades. Typical recycled content is 30%.
Manufacturability8
IC-Ag99.99-O's machinability is fair (45/100, better than 59% of precious metal grades); weldability good (65/100); formability excellent (99/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with IC-Ag99.99-O
Is IC-Ag99.99 easy to machine?
Very gummy and prone to smearing — use razor-sharp polished carbide or diamond tools, high speed, light feeds and generous lubricant; collect all chips as they are valuable.
Can IC-Ag99.99 be welded?
Joins readily by TIG, laser, resistance and ultrasonic bonding, but the extreme thermal conductivity demands high heat input and preheat; keep the melt oxygen-free to avoid gas porosity.
Can IC-Ag99.99 be formed, bent or molded?
Exceptional cold formability — can be rolled to leaf, deep drawn or wire-drawn with huge reductions; interstage anneal 600–700 °C in reducing or inert atmosphere.
What surface finishes work on IC-Ag99.99?
Polishes to the highest metallic reflectivity; protect with rhodium/palladium plating, anti-tarnish lacquer or benzotriazole-type inhibitors because sulfur atmospheres blacken bare silver quickly.
IC-Ag99.99 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance.
| Element | Spec limit (wt %) |
|---|---|
| Cumax impurity | ≤ 0 |
| Pbmax impurity | ≤ 0 |
| Femax impurity | ≤ 0 |
| Bimax impurity | ≤ 8×10⁻⁴ |
| Sbmax impurity | ≤ 8×10⁻⁴ |
| Temax impurity | ≤ 8×10⁻⁴ |
| Semax impurity | ≤ 5×10⁻⁴ |
| Pdmax impurity | ≤ 0 |
| Total impuritiessum of all impurity elements | ≤ 0.01 |
| AgGB/T 4135 IC-Ag99.99, Ag ≥ 99.99 % | ≥ 99.99 (balance) |
IC-Ag99.99-O — frequently asked
What is IC-Ag99.99-O used for?
IC-Ag99.99-O is typically used for investment bullion, electroplating anodes and alloy feedstock. In short: highest purity silver grade; top conductivity in family; feedstock, not structural.
What is the yield strength of IC-Ag99.99-O?
IC-Ag99.99-O has a typical yield strength of 55 MPa (7.98 ksi) and a tensile strength of 150 MPa (21.8 ksi) — weaker than 95% of precious metal grades. Strength varies by condition: see the 3 listed tempers.
Is IC-Ag99.99-O easy to machine?
Reasonably — machinability is rated fair (45/100, better than 59% of precious metal grades). Very gummy and prone to smearing — use razor-sharp polished carbide or diamond tools, high speed, light feeds and generous lubricant; collect all chips as they are valuable.
Can IC-Ag99.99-O be welded?
Yes — weldability is rated good (65/100). Joins readily by TIG, laser, resistance and ultrasonic bonding, but the extreme thermal conductivity demands high heat input and preheat; keep the melt oxygen-free to avoid gas porosity.
What surface finishes work on IC-Ag99.99-O?
Polishes to the highest metallic reflectivity; protect with rhodium/palladium plating, anti-tarnish lacquer or benzotriazole-type inhibitors because sulfur atmospheres blacken bare silver quickly.
Can IC-Ag99.99-O be formed, bent or molded?
Exceptional cold formability — can be rolled to leaf, deep drawn or wire-drawn with huge reductions; interstage anneal 600–700 °C in reducing or inert atmosphere.
What is the maximum service temperature of IC-Ag99.99-O?
IC-Ag99.99-O is rated for continuous use to about 500°C (932 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- GB/T 4135 (2016)
- ASTM B413 Standard Specification for Refined Silver — ASTM International (2019)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys (Precious Metals) — ASM International (1990)
- CRC Handbook of Chemistry and Physics — CRC Press (2020)
- Precious metal physical property tables — Johnson Matthey / Heraeus technical data (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.