Precious Metal 833 Silver
833 Silver is a silver–copper alloy at 83.3% silver, the second Netherlands fineness standard historically hallmarked on Dutch silverware.
Reference datasheet — 833 Silver 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
833 Silver tempers and conditions
833 Silver is supplied in 7 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Standard stocked sheet/wire condition for raising, spinning, deep drawing and chasing. | 100 | 300 | 40 | 58 HB | 83 % IACS |
As fabricated | Condition of cast hollowware, handles and jewellery bodies straight from the mould before working or ageing. | 115 | 280 | 15 | 64 HB | 82 % IACS |
Quarter hard | Light temper for parts that must hold shape but still take mild bending. | 250 | 360 | 20 | 85 HB | 82.5 % IACS |
Half hard | General-purpose temper for flatware blanks, bezels and rims needing rigidity. | 330 | 420 | 12 | 104 HB | 82 % IACS |
Pre-hardened | Precipitation hardening of the Cu-rich phase — use to harden finished cast or formed pieces without cold work. | 420 | 520 | 8 | 147 HB | 80 % IACS |
Full hard | Choose for knife handles, stiff wire and wear-exposed edges where no further forming is needed. | 430 | 500 | 5 | 128 HB | — |
Spring hard | For spring clips, pin stems and catch parts requiring maximum elastic limit. | 500 | 560 | 3 | 142 HB | 81 % IACS |
What is 833 Silver?
833 Silver is a silver–copper alloy at 83.3% silver, the second Netherlands fineness standard historically hallmarked on Dutch silverware. Mechanically it sits between 830 and 835 — 100 MPa yield, 300 MPa tensile, 40% elongation, 58 HB — with excellent cold formability (score 95) for raising, spinning and stamping, 83% IACS conductivity and a 250 °C service limit. Availability is limited to specialist mills and restoration stock, and the copper content brings firescale and tarnish; use 835 or 830 Silver where the exact fineness is not required. 833 Silver has a density of 10.2 g/cm³ (0.368 lb/in³), lighter than 57% of precious metal grades. It melts at 779°C (1,434 °F). 833 Silver has a yield strength of 100 MPa (14.5 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 84% of precious metal grades. Elongation at break is 40% and the elastic modulus is 79 GPa (11.5 Msi).
What is 833 Silver used for?
- Antique Dutch silverware restoration
- Decorative items and giftware
- Hallmarked reproduction flatware
- Hollowware and boxes
- Jewelry components
- Ecclesiastical and ceremonial pieces
Advantages
- Ductile — tolerates forming and impact — 40%, better than 92% of precious metal grades
- Forms and bends easily — 95/100, better than 91% of precious metal grades
- Conducts heat well — 345 W/m·K (199.3 BTU/hr·ft·°F), better than 88% of precious metal grades
- High electrical conductivity — 83 % IACS, better than 86% of precious metal grades
- Polishes to a fine finish — 95/100, better than 86% of precious metal grades
Limitations
- Needs corrosion protection — 60/100, worse than 88% of precious metal grades
- Low stiffness — 79 GPa (11.5 Msi), worse than 86% of precious metal grades
- Low strength — 100 MPa (14.5 ksi), worse than 84% of precious metal grades
833 Silver properties
Typical room-temperature values for 833 Silver-O; bars are the position among precious metal grades.
Physical3
833 Silver has a density of 10.2 g/cm³ (0.368 lb/in³), lighter than 57% of precious metal grades. It melts at 779°C (1,434 °F).
Mechanical12
833 Silver has a yield strength of 100 MPa (14.5 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 84% of precious metal grades. Elongation at break is 40% and the elastic modulus is 79 GPa (11.5 Msi).
Thermal6
833 Silver 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 18.7 µm/m·K (10.4 µin/in·°F).
Electrical3
833 Silver conducts electricity at 83 % IACS, better than 86% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 88% of precious metal grades.
Sustainability4
Producing a kilogram of 833 Silver takes about 1,250 MJ of energy and emits 85 kg of CO₂ — less than 64% of precious metal grades. Typical recycled content is 60%.
Manufacturability8
833 Silver's machinability is fair (50/100, better than 74% of precious metal grades); weldability good (60/100); formability excellent (95/100).
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. 833 Silver is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 833 Silver
Is 833 Silver easy to machine?
Machines gummy — use sharp, polished high-rake carbide or HSS, high speed, light feed and generous lubricant; collect all swarf for refining.
Can 833 Silver be welded?
Best joined by hard soldering with Ag brazing alloys or by laser/pulse-arc welding; torch welding risks copper oxidation, porosity and firescale.
Can 833 Silver be formed, bent or molded?
Excellent cold formability in the annealed temper (raising, spinning, deep drawing, stamping); interanneal at 600–650 °C with rapid quench every 40–50 % reduction.
833 Silver 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 |
|---|---|---|
| Aghallmark fineness 833/1000, no negative tolerance under Dutch Waarborgwet | 83.3 – 84.5 | 83.3 |
| Znoptional deoxidiser in some casting stocks | 0 – 1 | 0 |
| Sioccasional grain/oxidation control addition | 0 – 0.05 | 0 |
| Other (Pb, Cd, Ni)impurities; Cd and Ni restricted for skin contact (EU REACH) | 0 – 0.1 | 0 |
| Cuprincipal hardener | ≥ 15 (balance) |
What surface finishes work on 833 Silver?
Polishes to a high mirror; remove firescale by pickling or depletion silvering, then optionally rhodium-plate or lacquer for tarnish resistance, or patinate with liver of sulphur.
How much does 833 Silver cost?
833 Silver 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.
833 Silver — frequently asked
What is 833 Silver used for?
833 Silver is typically used for antique Dutch silverware restoration, decorative items and giftware, hallmarked reproduction flatware, hollowware and boxes, jewelry components and ecclesiastical and ceremonial pieces. In short: dutch second fineness standard; very high cold formability; restoration-grade silver alloy.
What is the yield strength of 833 Silver?
833 Silver has a typical yield strength of 100 MPa (14.5 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 84% of precious metal grades. Strength varies by condition: see the 7 listed tempers.
Is 833 Silver easy to machine?
Reasonably — machinability is rated fair (50/100, better than 74% of precious metal grades). Machines gummy — use sharp, polished high-rake carbide or HSS, high speed, light feed and generous lubricant; collect all swarf for refining.
Can 833 Silver be welded?
Yes — weldability is rated good (60/100). Best joined by hard soldering with Ag brazing alloys or by laser/pulse-arc welding; torch welding risks copper oxidation, porosity and firescale.
What surface finishes work on 833 Silver?
Polishes to a high mirror; remove firescale by pickling or depletion silvering, then optionally rhodium-plate or lacquer for tarnish resistance, or patinate with liver of sulphur.
Can 833 Silver be formed, bent or molded?
Excellent cold formability in the annealed temper (raising, spinning, deep drawing, stamping); interanneal at 600–650 °C with rapid quench every 40–50 % reduction.
What is the maximum service temperature of 833 Silver?
833 Silver 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 833 Silver-O and 833 Silver-H08?
O is the default condition — standard stocked sheet/wire condition for raising, spinning, deep drawing and chasing. H08: for spring clips, pin stems and catch parts requiring maximum elastic limit. Yield strength is 100 MPa in O versus 500 MPa in H08.
How much does 833 Silver cost?
833 Silver 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
- Waarborgwet 1986 — Dutch hallmarking standards for silver (835/833/925) — Waarborg Holland (1986)
- ISO 9202 Jewellery — Fineness of precious metal alloys — ISO (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (Silver and Silver Alloys) — ASM International (1990)
- ASM Binary Alloy Phase Diagrams — Ag–Cu system — ASM International (1990)
- The Theory and Practice of Goldsmithing / jewellery alloy metallurgy references — Brynmorgen Press (2004)
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.