Precious Metal 92Ag-8SnO2
ASTM B735
92Ag-8SnO2 is a low-oxide silver-tin oxide contact composite to ASTM B735, supplied as PM-EXT, O, H02, H04 and bimetal (BIM-Ag) product.
Reference datasheet — 92Ag-8SnO2 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the O condition
92Ag-8SnO2 tempers and conditions
92Ag-8SnO2 is supplied in 4 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
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 |
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 |
Supply forms, finishes and certifications
Ways 92Ag-8SnO2 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
BIM-Ag | Bimetal tip | Surface finish |
What is 92Ag-8SnO2?
92Ag-8SnO2 is a low-oxide silver-tin oxide contact composite to ASTM B735, supplied as PM-EXT, O, H02, H04 and bimetal (BIM-Ag) product. The reduced 8% SnO2 content keeps conductivity at 82% IACS and thermal conductivity at 345 W/m·K while leaving enough ductility for stamping and cold heading, with 225 MPa tensile strength, 22% elongation and 57 HB in the default condition. Service temperature is 250 °C and corrosion resistance is high, but arc-erosion resistance is lower than higher-oxide grades, so it suits light-duty switching. Step up to 88Ag-12SnO2 for contactor and breaker duty. 92Ag-8SnO2 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). 92Ag-8SnO2 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 225 MPa (32.6 ksi) — weaker than 80% of precious metal grades. Elongation at break is 22% and the elastic modulus is 88 GPa (12.8 Msi).
What is 92Ag-8SnO2 used for?
- Small signal relay contacts
- Low-current switch contacts
- Contact rivets
- Silver-backed bimetal contact tape
- Control and instrument switch contacts
- Automotive signal relays
Advantages
- Conducts heat well — 345 W/m·K (199.3 BTU/hr·ft·°F), better than 88% of precious metal grades
- High electrical conductivity — 82 % IACS, better than 85% of precious metal grades
Limitations
- Low strength — 110 MPa (16 ksi), worse than 80% of precious metal grades
- Difficult to weld — 25/100, worse than 78% of precious metal grades
- Limited formability — 70/100, worse than 78% of precious metal grades
- Hard to polish — 70/100, worse than 76% of precious metal grades
92Ag-8SnO2 properties
Typical room-temperature values for 92Ag-8SnO2-O; bars are the position among precious metal grades.
Physical3
92Ag-8SnO2 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 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 225 MPa (32.6 ksi) — weaker than 80% of precious metal grades. Elongation at break is 22% and the elastic modulus is 88 GPa (12.8 Msi).
Thermal6
92Ag-8SnO2 is rated for continuous service to 250°C (482 °F). It conducts heat at 345 W/m·K (199.3 BTU/hr·ft·°F), better than 88% of precious metal grades. Thermal expansion is 19 µm/m·K (10.6 µin/in·°F).
Electrical3
92Ag-8SnO2 conducts electricity at 82 % IACS, better than 85% 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 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's machinability is fair (45/100, better than 59% of precious metal grades); weldability poor (25/100); formability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the precious metal family
Yield strength against density for every precious metal grade FabDigit runs. 92Ag-8SnO2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 92Ag-8SnO2
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.
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 |
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.
Equivalent designations
Standards and trade names that resolve to Precious Metal 92Ag-8SnO2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B735
- Also called
- AgSnO2-8
How much does 92Ag-8SnO2 cost?
92Ag-8SnO2 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
92Ag-8SnO2 — frequently asked
What is 92Ag-8SnO2 used for?
92Ag-8SnO2 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?
92Ag-8SnO2 has a typical yield strength of 110 MPa (16 ksi) and a tensile strength of 225 MPa (32.6 ksi) — weaker than 80% of precious metal grades. Strength varies by condition: see the 4 listed tempers.
Is 92Ag-8SnO2 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 59% 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 be welded?
Not readily — weldability is rated poor (25/100). 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?
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 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?
92Ag-8SnO2 is rated for continuous use to about 250°C (482 °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.
How much does 92Ag-8SnO2 cost?
92Ag-8SnO2 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.