Precious Metal B617-H04 vs B617-H08
Precious Metal · B617 temper comparison
B617-H04 and B617-H08 are two conditions of the same precious metal grade, B617: H04 (full hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. B617-H08 is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 310 MPa (45 ksi) for B617-H04, about 45% more; tensile strength follows at 500 MPa (72.5 ksi) vs 400 MPa (58 ksi). In exchange, B617-H04 is the more ductile: elongation 10% versus 3% for B617-H08, and B617-H08 is harder (124 HB vs 100 HB).
B617-H04Choose it when the part is bent, formed or impact-loaded.
B617-H08Choose it when strength drives the design.
B617-H04 vs B617-H08: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 79 GPa11.5 Msi · Shear Modulus 29 GPa4.2 Msi · Bulk Modulus 100 GPa14.5 Msi · Poisson's Ratio 0.37 · Reduction in Area 70%
Physical
Density and transition temperatures.
Same in both: Density 10.31 g/cm³0.37 lb/in³ · Melting Point (Solidus) 779°C1,434 °F · Liquidus Temperature 875°C1,607 °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 237 J/kg·K0.06 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 18.7 µm/m·K10.4 µin/in·°F · Latent Heat of Fusion 105 J/g45.1 BTU/lb · 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 78 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 55% · Weldability 55 / 100 · Castability 72 / 100 · Brazeability / Solderability 95 / 100 · Polishability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 1,500 MJ/kg644,885 BTU/lb · Embodied Carbon (primary production) 100 kg CO₂/kg · Embodied Water 3,000 L/kg359 gal/lb · Typical Recycled Content 45%
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.
B617-H04 vs B617-H08 — frequently asked
Is B617-H08 stronger than B617-H04?
Yes. B617-H08 has a typical yield strength of 450 MPa (65.3 ksi) against 310 MPa (45 ksi) for B617-H04 — about 45% more. Tensile strength is 500 MPa (72.5 ksi) vs 400 MPa (58 ksi).
Which condition does FabDigit quote by default, H04 or H08?
O is the default B617 condition in the FabDigit quote flow (neither H04 nor H08). 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, B617-H04 or B617-H08?
B617-H08, by a small margin. Both rate good for machinability — 68/100 against 63/100 for B617-H04.
Ready to make it?
Upload a CAD file and FabDigit prices the part in B617-H04 and B617-H08 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.