Precious Metal 92Ag-8SnO2-H02
Supply condition
ASTM B735
H02 = half hard
Compromise temper when contact tips need more indentation resistance than soft stock but must still be riveted or bent.
Values for the H02 condition
Other 92Ag-8SnO2 tempers and conditions
92Ag-8SnO2 is listed in 4 conditions; see the grade overview at 92Ag-8SnO2.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Default stocked condition: maximum conductivity and ductility for cold heading of rivets, riveting/staking and forming of contact tips. | 110 | 225 | 22 | 57 HB | 82 % IACS |
As-sintered / extruded | Pick for semi-finished extruded rod/strip that will be further drawn, rolled or headed by the contact fabricator. | 140 | 245 | 15 | 65 HB | 80 % IACS |
H02This page Half hard | Compromise temper when contact tips need more indentation resistance than soft stock but must still be riveted or bent. | 200 | 275 | 8 | 74 HB | 80 % IACS |
Full hard | Pick for stiff contact springs, blade/bridge contacts and rivet shanks needing maximum hardness and indentation resistance; ductility for heading is limited. | 275 | 325 | 4 | 90 HB | 79 % IACS |
What is 92Ag-8SnO2-H02?
92Ag-8SnO2-H02 is 92Ag-8SnO2 supplied in the H02 condition — compromise temper when contact tips need more indentation resistance than soft stock but must still be riveted or bent. 92Ag-8SnO2-H02 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 275 MPa (39.9 ksi) — stronger than 51% of precious metal grades. Elongation at break is 8% and the elastic modulus is 88 GPa (12.8 Msi). 92Ag-8SnO2-H02 has a density of 10.1 g/cm³ (0.365 lb/in³), lighter than 61% of precious metal grades. It melts at 961°C (1,762 °F). O is the default condition FabDigit quotes; H02 is available on request or by drawing note.
Advantages
- Conducts heat well — 340 W/m·K (196.4 BTU/hr·ft·°F), better than 86% of precious metal grades
- High electrical conductivity — 80 % IACS, better than 83% of precious metal grades
Limitations
- Limited service temperature — 180°C (356 °F), worse than 100% of precious metal grades
- Limited ductility — 8%, worse than 92% of precious metal grades
- Limited formability — 50/100, worse than 90% of precious metal grades
- Difficult to weld — 22/100, worse than 79% of precious metal grades
- Hard to polish — 70/100, worse than 76% of precious metal grades
92Ag-8SnO2-H02 properties
Typical room-temperature values for 92Ag-8SnO2-H02; 21 are specific to this condition. Other listed values are 92Ag-8SnO2 reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
92Ag-8SnO2-H02 has a density of 10.1 g/cm³ (0.365 lb/in³), lighter than 61% of precious metal grades. It melts at 961°C (1,762 °F).
Mechanical10
92Ag-8SnO2-H02 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 275 MPa (39.9 ksi) — stronger than 51% of precious metal grades. Elongation at break is 8% and the elastic modulus is 88 GPa (12.8 Msi).
Thermal6
92Ag-8SnO2-H02 is rated for continuous service to 180°C (356 °F). It conducts heat at 340 W/m·K (196.4 BTU/hr·ft·°F), better than 86% of precious metal grades. Thermal expansion is 19 µm/m·K (10.6 µin/in·°F).
Electrical3
92Ag-8SnO2-H02 conducts electricity at 80 % IACS, better than 83% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 67% of precious metal grades.
Sustainability4
Producing a kilogram of 92Ag-8SnO2-H02 takes about 1,450 MJ of energy and emits 110 kg of CO₂ — less than 54% of precious metal grades. Typical recycled content is 40%.
Manufacturability6
92Ag-8SnO2-H02's machinability is fair (48/100, better than 71% of precious metal grades); weldability poor (22/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 92Ag-8SnO2-H02
Is 92Ag-8SnO2 easy to machine?
Turns and blanks easily but SnO2 particles abrade tooling — use carbide or PCD, sharp positive rake, light feeds, and collect all chips for refining.
Can 92Ag-8SnO2 be welded?
Not fusion weldable (oxide prevents sound metal flow); attach by resistance welding or Ag-brazing through a fine-silver back layer.
Can 92Ag-8SnO2 be formed, bent or molded?
Annealed stock cold-heads, coins and rivets well; interstage anneal at 550–650 °C in protective atmosphere after heavy drawing/rolling reductions.
What surface finishes work on 92Ag-8SnO2?
Contact faces are used as-formed or lightly coined; can be electroplated with Ag or dipped in anti-tarnish, but no anodizing — degrease and avoid sulfur-bearing packaging.
92Ag-8SnO2 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 |
|---|---|---|
| SnO2fine dispersed tin(IV) oxide phase | 7 – 9 | 8 |
| In2O3+Bi2O3+CuO (additives)optional wetting/erosion additives, producer-dependent | 0 – 0.6 | 0.2 |
| Agsilver matrix, ≥99.95 % purity feedstock | balance | — |
92Ag-8SnO2-H02 — frequently asked
What is 92Ag-8SnO2-H02 used for?
92Ag-8SnO2-H02 is typically used for small signal relay contacts, low-current switch contacts, contact rivets, silver-backed bimetal contact tape, control and instrument switch contacts and automotive signal relays. In short: most formable AgSnO2 grade; cadmium-free light-duty contact; lower arc-erosion resistance.
What is the yield strength of 92Ag-8SnO2-H02?
92Ag-8SnO2-H02 has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 275 MPa (39.9 ksi) — stronger than 51% of precious metal grades. Strength varies by condition: see the 4 listed tempers.
Is 92Ag-8SnO2-H02 easy to machine?
Reasonably — machinability is rated fair (48/100, better than 71% of precious metal grades). Turns and blanks easily but SnO2 particles abrade tooling — use carbide or PCD, sharp positive rake, light feeds, and collect all chips for refining.
Can 92Ag-8SnO2-H02 be welded?
Not readily — weldability is rated poor (22/100). Not fusion weldable (oxide prevents sound metal flow); attach by resistance welding or Ag-brazing through a fine-silver back layer.
What surface finishes work on 92Ag-8SnO2-H02?
Contact faces are used as-formed or lightly coined; can be electroplated with Ag or dipped in anti-tarnish, but no anodizing — degrease and avoid sulfur-bearing packaging.
Can 92Ag-8SnO2-H02 be formed, bent or molded?
Annealed stock cold-heads, coins and rivets well; interstage anneal at 550–650 °C in protective atmosphere after heavy drawing/rolling reductions.
What is the maximum service temperature of 92Ag-8SnO2-H02?
92Ag-8SnO2-H02 is rated for continuous use to about 180°C (356 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 92Ag-8SnO2-O and 92Ag-8SnO2-H04?
O is the default condition — default stocked condition: maximum conductivity and ductility for cold heading of rivets, riveting/staking and forming of contact tips. H04: pick for stiff contact springs, blade/bridge contacts and rivet shanks needing maximum hardness and indentation resistance; ductility for heading is limited. Yield strength is 110 MPa in O versus 275 MPa in H04.
Sources
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (Electrical Contact Materials) — ASM International (1990)
- Silver–tin oxide contact materials (AgSnO2 8 / 10 / 12) technical data — DODUCO / Umicore Technical Materials (2022)
- GB/T (silver-based electrical contact materials) (2018)
- IEC 60947-1 low-voltage switchgear contact material practice — IEC (2020)
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.