Precious Metal AgC10-HP (Hot pressed / hot repressed)
Other
Near-full-density condition for large contact blocks where uniform properties and minimum porosity are required.
Values for the HP condition
Other AgC10 tempers and conditions
AgC10 is listed in 4 conditions; see the grade overview at AgC10.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition, used when the contact must be riveted, staked or coined into a carrier without cracking. | 45 | 95 | 8 | 25 HB | 50 % IACS |
Sintered | Lower-density economy condition for low-duty contacts; softer and slightly more resistive due to residual porosity. | 48 | 75 | 3 | 23 HB | 42 % IACS |
PSRDefault Pressed, sintered and repressed | Standard stocked PM condition for rivets, tips and buttons where isotropic properties and low cost are wanted. | 70 | 110 | 4 | 30 HB | 48 % IACS |
HPThis page Hot pressed / hot repressed | Near-full-density condition for large contact blocks where uniform properties and minimum porosity are required. | 85 | 125 | 5 | 33 HB | 50 % IACS |
What is AgC10-HP?
AgC10-HP is AgC10 in the HP condition — near-full-density condition for large contact blocks where uniform properties and minimum porosity are required. AgC10-HP has a yield strength of 85 MPa (12.3 ksi) and a tensile strength of 125 MPa (18.1 ksi) — weaker than 87% of precious metal grades. Elongation at break is 5% and the elastic modulus is 60 GPa (8.7 Msi). AgC10-HP has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 99% of precious metal grades. It melts at 961°C (1,762 °F). PSR is the default condition FabDigit quotes; HP is available on request or by drawing note.
Advantages
- Lightweight — 7.8 g/cm³ (0.282 lb/in³), better than 99% of precious metal grades
- Easy to machine — 60/100, better than 97% of precious metal grades
Limitations
- Hard to polish — 40/100, worse than 100% of precious metal grades
- Low stiffness — 60 GPa (8.7 Msi), worse than 99% of precious metal grades
- Limited formability — 25/100, worse than 95% of precious metal grades
- Limited ductility — 5%, worse than 93% of precious metal grades
- Difficult to weld — 18/100, worse than 93% of precious metal grades
AgC10-HP properties
Typical room-temperature values for AgC10-HP; 20 are specific to this condition. Other listed values are AgC10 reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
AgC10-HP has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 99% of precious metal grades. It melts at 961°C (1,762 °F).
Mechanical7
AgC10-HP has a yield strength of 85 MPa (12.3 ksi) and a tensile strength of 125 MPa (18.1 ksi) — weaker than 87% of precious metal grades. Elongation at break is 5% and the elastic modulus is 60 GPa (8.7 Msi).
Thermal6
AgC10-HP is rated for continuous service to 300°C (572 °F). It conducts heat at 210 W/m·K (121.3 BTU/hr·ft·°F), better than 70% of precious metal grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
AgC10-HP conducts electricity at 50 % IACS, better than 71% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is excellent (85/100), better than 61% of precious metal grades.
Sustainability3
Producing a kilogram of AgC10-HP takes about 1,300 MJ of energy and emits 90 kg of CO₂ — less than 61% of precious metal grades. Typical recycled content is 40%.
Manufacturability6
AgC10-HP's machinability is good (60/100, better than 97% of precious metal grades); weldability poor (18/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with AgC10-HP
Is AgC10 easy to machine?
Machines easily with sharp, polished-flute carbide or HSS tools at high speed and light feed; graphite provides self-lubrication so cut dry or with mist and collect all swarf for silver reclaim.
Can AgC10 be welded?
Not fusion weldable — the graphite prevents wetting; join by resistance welding, riveting or brazing through a silver or copper backing layer.
Can AgC10 be formed, bent or molded?
Made by powder metallurgy (press–sinter–repress, hot press or extrusion of sintered billet); finished parts tolerate only light coining/riveting, so avoid sharp bends and heavy cold work.
What surface finishes work on AgC10?
Surfaces are used as-machined or lightly lapped; avoid abrasive blasting (graphite smearing) and keep parts in sulfur-free packaging to limit tarnish, no plating of the working face.
AgC10 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. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cgraphite, dispersed; ~30–35 vol% | 9 – 11 | 10 |
| impurities (total)Fe, Cu, Pb, Bi etc. combined | ≤ 0.15 | — |
| Ag≥89.8 % Ag matrix | balance | — |
AgC10-HP — frequently asked
What is AgC10-HP used for?
AgC10-HP is typically used for low-voltage switchgear, circuit breaker contacts, sliding/brush contacts and relay contacts. In short: strongest anti-weld silver contact; self-lubricating contact material; low arc-erosion life.
What is the yield strength of AgC10-HP?
AgC10-HP has a typical yield strength of 85 MPa (12.3 ksi) and a tensile strength of 125 MPa (18.1 ksi) — weaker than 87% of precious metal grades. Strength varies by condition: see the 4 listed tempers.
Is AgC10-HP easy to machine?
Reasonably — machinability is rated good (60/100, better than 97% of precious metal grades). Machines easily with sharp, polished-flute carbide or HSS tools at high speed and light feed; graphite provides self-lubrication so cut dry or with mist and collect all swarf for silver reclaim.
Can AgC10-HP be welded?
Not readily — weldability is rated poor (18/100). Not fusion weldable — the graphite prevents wetting; join by resistance welding, riveting or brazing through a silver or copper backing layer.
What surface finishes work on AgC10-HP?
Surfaces are used as-machined or lightly lapped; avoid abrasive blasting (graphite smearing) and keep parts in sulfur-free packaging to limit tarnish, no plating of the working face.
Can AgC10-HP be formed, bent or molded?
Made by powder metallurgy (press–sinter–repress, hot press or extrusion of sintered billet); finished parts tolerate only light coining/riveting, so avoid sharp bends and heavy cold work.
What is the maximum service temperature of AgC10-HP?
AgC10-HP is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between AgC10-PSR and AgC10-ANN?
PSR is the default condition — standard stocked PM condition for rivets, tips and buttons where isotropic properties and low cost are wanted. ANN: softest condition, used when the contact must be riveted, staked or coined into a carrier without cracking. Yield strength is 70 MPa in PSR versus 45 MPa in ANN.
Sources
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (electrical contact materials) — ASM International (1990)
- Electrical Contacts: Principles and Applications — CRC Press (2014)
- Silver-graphite (AgC) contact material data — Doduco / AMI Doduco (2022)
- Silver and silver alloy property data — Copper/Precious metal alloy databases (CES-type) (2021)
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.