Precious Metal 70Ag-30Ni-H04 vs 70Ag-30Ni-O
Precious Metal · 70Ag-30Ni temper comparison
70Ag-30Ni-H04 and 70Ag-30Ni-O are two conditions of the same precious metal grade, 70Ag-30Ni: H04 (full hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 70Ag-30Ni-H04 is the stronger of the two: yield strength 370 MPa (53.7 ksi) against 110 MPa (16 ksi) for 70Ag-30Ni-O, about 3.4 times as much; tensile strength follows at 410 MPa (59.5 ksi) vs 260 MPa (37.7 ksi). In exchange, 70Ag-30Ni-O is the more ductile: elongation 25% versus 3% for 70Ag-30Ni-H04, and 70Ag-30Ni-H04 is harder (95 HB vs 58 HB). 70Ag-30Ni-O runs hotter in service (250°C vs 180°C continuous). On the shop floor, 70Ag-30Ni-H04 machines more easily (good vs fair) and 70Ag-30Ni-O welds better (very good vs good).
70Ag-30Ni-H04Choose it when strength drives the design, or when the part is machined in volume.
70Ag-30Ni-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
70Ag-30Ni-H04 vs 70Ag-30Ni-O: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all precious metal grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all precious metal grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 110 GPa16 Msi · Shear Modulus 41 GPa5.9 Msi · Bulk Modulus 122 GPa17.7 Msi · Poisson's Ratio 0.35 · Reduction in Area 55%
Physical
Density and transition temperatures.
Same in both: Density 9.95 g/cm³0.36 lb/in³ · Melting Point (Solidus) 961°C1,762 °F · Liquidus Temperature 1,455°C2,651 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 295 J/kg·K0.07 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.5 µm/m·K9.7 µin/in·°F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) 0.05 V · Corrosion Resistance 72 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 35% · Castability 10 / 100 · Brazeability / Solderability 90 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 1,100 MJ/kg472,915 BTU/lb · Embodied Carbon (primary production) 80 kg CO₂/kg · Embodied Water 1,500 L/kg180 gal/lb · Typical Recycled Content 50%
Strength versus weight
Yield strength against density for every precious metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
70Ag-30Ni-H04 vs 70Ag-30Ni-O — frequently asked
Is 70Ag-30Ni-H04 stronger than 70Ag-30Ni-O?
Yes. 70Ag-30Ni-H04 has a typical yield strength of 370 MPa (53.7 ksi) against 110 MPa (16 ksi) for 70Ag-30Ni-O — about 3.4 times as much. Tensile strength is 410 MPa (59.5 ksi) vs 260 MPa (37.7 ksi).
Which condition does FabDigit quote by default, H04 or O?
O is the default 70Ag-30Ni condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, 70Ag-30Ni-H04 or 70Ag-30Ni-O?
70Ag-30Ni-H04. Its machinability rates good (55/100) against fair (45/100) for 70Ag-30Ni-O; for welding the order is 70Ag-30Ni-O first (very good, 70/100) then 70Ag-30Ni-H04 (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 70Ag-30Ni-H04 and 70Ag-30Ni-O side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.