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Precious Metal IC-Ag99.95-H04

Supply condition

H04 = full hard

Choose for hard-drawn wire, springy contact fingers and parts needing maximum strength with little forming.

High cost $$$$
Request a quote in IC-Ag99.95-H04IC-Ag99.95 overview

Values for the H04 condition

Other IC-Ag99.95 tempers and conditions

IC-Ag99.95 is listed in 5 conditions; see the grade overview at IC-Ag99.95.

Compare all 5 conditionsHide
Condition · open for datasheetBest forYield MPaTensile MPaElong. %HardnessConductivity
CastDefault
As cast
Standard 1 kg / 15 kg refined ingot for remelting, alloying, electrolyte or chemical feedstock.451303525 HB106 % IACS
O
Annealed
Pick for deep drawing, spinning, bonding wire, gaskets and contact rivets needing maximum ductility and conductivity.551504826 HB106 % IACS
H02
Half hard
Compromise temper for stamped contacts and formed parts that must hold shape yet still bend.1802401558 HB105 % IACS
H04This page
Full hard
Choose for hard-drawn wire, springy contact fingers and parts needing maximum strength with little forming.270310590 HB103 % IACS
H08
Spring hard
Only for fine spring wire and probe/contact wire where peak strength matters more than ductility.3203602102 HB102 % IACS

What is IC-Ag99.95-H04?

IC-Ag99.95-H04 is IC-Ag99.95 supplied in the H04 condition — choose for hard-drawn wire, springy contact fingers and parts needing maximum strength with little forming. IC-Ag99.95-H04 has a yield strength of 270 MPa (39.2 ksi) and a tensile strength of 310 MPa (45 ksi) — stronger than 88% of precious metal grades. Elongation at break is 5% and the elastic modulus is 74 GPa (10.7 Msi). IC-Ag99.95-H04 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). Cast is the default condition FabDigit quotes; H04 is available on request or by drawing note.

Advantages

  • Conducts heat well — 420 W/m·K (242.7 BTU/hr·ft·°F), better than 98% of precious metal grades
  • High electrical conductivity — 103 % IACS, better than 98% of precious metal grades
  • High strength — 270 MPa (39.2 ksi), better than 88% of precious metal grades
  • Easy to machine — 55/100, better than 86% of precious metal grades
  • Polishes to a fine finish — 95/100, better than 86% of precious metal grades

Limitations

  • Limited service temperature — 150°C (302 °F), worse than 100% of precious metal grades
  • Low stiffness — 74 GPa (10.7 Msi), worse than 99% of precious metal grades
  • Limited ductility — 5%, worse than 93% of precious metal grades
  • Limited formability — 40/100, worse than 91% of precious metal grades

IC-Ag99.95-H04 properties

Typical room-temperature values for IC-Ag99.95-H04; 12 are specific to this condition. Other listed values are IC-Ag99.95 reference data and may not represent this condition. Bars are the position among precious metal grades.

Physical3

IC-Ag99.95-H04 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).

Density10.49 g/cm³0.38 lb/in³
Melting Point (Solidus)962°C1,763 °F
Liquidus Temperature962°C1,763 °F

Mechanical12

IC-Ag99.95-H04 has a yield strength of 270 MPa (39.2 ksi) and a tensile strength of 310 MPa (45 ksi) — stronger than 88% of precious metal grades. Elongation at break is 5% and the elastic modulus is 74 GPa (10.7 Msi).

Elastic (Young's) Modulus74 GPa10.7 Msi
Shear Modulus29 GPa4.2 Msi
Bulk Modulus100 GPa14.5 Msi
Poisson's Ratio0.37
Tensile Strength (Ultimate)310 MPa45 ksi
Yield Strength (0.2% offset)270 MPa39.2 ksi
Elongation at Break5%
Reduction in Area50%
Shear Strength185 MPa26.8 ksi
Fatigue Strength (Endurance Limit)85 MPa12.3 ksi
Hardness, Brinell90 HB
Hardness, Vickers95 HV

Thermal6

IC-Ag99.95-H04 is rated for continuous service to 150°C (302 °F). It conducts heat at 420 W/m·K (242.7 BTU/hr·ft·°F), better than 98% of precious metal grades. Thermal expansion is 19.5 µm/m·K (10.8 µin/in·°F).

Thermal Conductivity420 W/m·K243 BTU/hr·ft·°F
Specific Heat Capacity235 J/kg·K0.06 BTU/lb·°F
Thermal Expansion (CTE, 20–100 °C)19.5 µm/m·K10.8 µin/in·°F
Latent Heat of Fusion105 J/g45.1 BTU/lb
Max Service Temperature (continuous)150°C302 °F
Min Service Temperature-200°C-328 °F

Electrical3

IC-Ag99.95-H04 conducts electricity at 103 % IACS, better than 98% of precious metal grades.

Electrical Conductivity103 % IACS
Electrical Resistivity1.63×10⁻⁸ Ω·m0.642 µΩ·in
Magnetic Responsenon-magnetic (diamagnetic)

Chemical & Environmental3

Corrosion resistance is very good (82/100), better than 53% of precious metal grades.

Galvanic Potential (seawater, vs SCE)0.05 V
Corrosion ResistanceVery good82/100
Chemical Resistance SummaryResists water, alkalis, organic acids and most non-oxidising acids; attacked by nitric acid, hot concentrated sulfuric acid, cyanide + oxidiser solutions, halogens and molten sulfur; blackens rapidly in H2S/SO2 air and in ozone.

Sustainability4

Producing a kilogram of IC-Ag99.95-H04 takes about 1,600 MJ of energy and emits 110 kg of CO₂ — more than 56% of precious metal grades. Typical recycled content is 30%.

Embodied Energy (primary production)1,600 MJ/kg687,877 BTU/lb
Embodied Carbon (primary production)110 kg CO₂/kg
Embodied Water2,500 L/kg300 gal/lb
Typical Recycled Content30%

Manufacturability8

IC-Ag99.95-H04's machinability is good (55/100, better than 86% of precious metal grades); weldability very good (75/100); formability fair (40/100).

MachinabilityGood55/100
Machinability Rating (AISI 1212 = 100 %)50%
WeldabilityVery good75/100
Formability (cold)Fair40/100
CastabilityExcellent85/100
Brazeability / SolderabilityExcellent97/100
PolishabilityExcellent95/100
Anodizing Responsen/a — silver is not anodised; surfaces are electro-polished, plated (Rh/Au) or lacquered for anti-tarnish

Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.

Working with IC-Ag99.95-H04

Is IC-Ag99.95 easy to machine?

Very gummy — use sharp polished high-rake HSS/carbide, high speed, light depth and generous lubrication to avoid smearing and built-up edge; collect all swarf for refining.

Can IC-Ag99.95 be welded?

Resistance, laser and micro-TIG welding work but the 429 W/m·K conductivity demands short, high-energy pulses; more commonly joined by silver brazing or soft soldering.

Can IC-Ag99.95 be formed, bent or molded?

Outstanding cold formability in O temper (deep draw, spin, roll-bond, draw to <25 µm wire); anneal 550–650 °C in slightly reducing or inert atmosphere and avoid oxygen/hydrogen embrittlement cycles.

What surface finishes work on IC-Ag99.95?

Not anodisable; electropolish or buff to a mirror finish, then rhodium/gold plate or apply anti-tarnish lacquer/benzotriazole treatment to suppress sulfide blackening.

IC-Ag99.95 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.

ElementSpec limit (wt %)
Cuprincipal permitted impurity≤ 0.03
Pb≤ 0.02
Fe≤ 0
Bi≤ 0
Sb≤ 0
Se≤ 0
Te≤ 0
Pd≤ 0
AgGB/T 4135 grade IC-Ag99.95; total impurities ≤ 0.05 wt%≥ 99.95 (balance)

IC-Ag99.95-H04 — frequently asked

What is IC-Ag99.95-H04 used for?

IC-Ag99.95-H04 is typically used for electrical contacts, catalysts and alloy feedstock. In short: highest IACS on file; contact and catalyst purity; very soft, non-structural.

What is the yield strength of IC-Ag99.95-H04?

IC-Ag99.95-H04 has a typical yield strength of 270 MPa (39.2 ksi) and a tensile strength of 310 MPa (45 ksi) — stronger than 88% of precious metal grades. Strength varies by condition: see the 5 listed tempers.

Is IC-Ag99.95-H04 easy to machine?

Reasonably — machinability is rated good (55/100, better than 86% of precious metal grades). Very gummy — use sharp polished high-rake HSS/carbide, high speed, light depth and generous lubrication to avoid smearing and built-up edge; collect all swarf for refining.

Can IC-Ag99.95-H04 be welded?

Yes — weldability is rated very good (75/100). Resistance, laser and micro-TIG welding work but the 429 W/m·K conductivity demands short, high-energy pulses; more commonly joined by silver brazing or soft soldering.

What surface finishes work on IC-Ag99.95-H04?

Not anodisable; electropolish or buff to a mirror finish, then rhodium/gold plate or apply anti-tarnish lacquer/benzotriazole treatment to suppress sulfide blackening.

Can IC-Ag99.95-H04 be formed, bent or molded?

Outstanding cold formability in O temper (deep draw, spin, roll-bond, draw to <25 µm wire); anneal 550–650 °C in slightly reducing or inert atmosphere and avoid oxygen/hydrogen embrittlement cycles.

What is the maximum service temperature of IC-Ag99.95-H04?

IC-Ag99.95-H04 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.

What is the difference between IC-Ag99.95 Cast and IC-Ag99.95-H08?

Cast is the default condition — standard 1 kg / 15 kg refined ingot for remelting, alloying, electrolyte or chemical feedstock. H08: only for fine spring wire and probe/contact wire where peak strength matters more than ductility. Yield strength is 45 MPa in Cast versus 320 MPa in H08.

Sources

  1. GB/T 4135 (Silver ingots) (2016)
  2. ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (Precious Metals) — ASM International (1990)
  3. CRC Handbook of Chemistry and Physics (element property tables) — CRC Press (2020)
  4. ASTM B413 — Standard Specification for Refined Silver — ASTM International (2019)
  5. Silver alloy datasheets and precious-metal engineering data — Heraeus / Umicore technical literature (2022)
  6. (silver spot quotations) (2026)

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.