Precious Metal B541-A vs B541-SR
Precious Metal · B541 temper comparison
B541-A and B541-SR are two conditions of the same precious metal grade, B541: A (solution annealed) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. B541-SR is the stronger of the two: yield strength 560 MPa (81.2 ksi) against 200 MPa (29 ksi) for B541-A, about 180% more; tensile strength follows at 700 MPa (102 ksi) vs 430 MPa (62.4 ksi). In exchange, B541-A is the more ductile: elongation 30% versus 5% for B541-SR, and B541-SR is harder (205 HV vs 120 HV). B541-A runs hotter in service (400°C vs 230°C continuous) and B541-SR conducts heat better (55 W/m·K vs 48 W/m·K).
B541-AChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
B541-SRChoose it when strength drives the design.
B541-A vs B541-SR: 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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Vickers
Same in both: Shear Modulus 39 GPa5.7 Msi · Bulk Modulus 145 GPa21 Msi · Poisson's Ratio 0.37
Physical
Density and transition temperatures.
Same in both: Density 16 g/cm³0.58 lb/in³ · Melting Point (Solidus) 1,000°C1,832 °F · Liquidus Temperature 1,045°C1,913 °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 150 J/kg·K0.04 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 15 µm/m·K8.3 µin/in·°F · Latent Heat of Fusion 75 J/g32.2 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 8.5 % IACS · Electrical Resistivity 2.03×10⁻⁷ Ω·m7.99 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) 0.25 V · Corrosion Resistance 98 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 70 / 100 · Castability 70 / 100 · Brazeability / Solderability 90 / 100 · Polishability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 170,000 MJ/kg7.31×10⁷ BTU/lb · Embodied Carbon (primary production) 13,000 kg CO₂/kg · Embodied Water 120,000 L/kg14,379 gal/lb · Typical Recycled Content 60%
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.
B541-A vs B541-SR — frequently asked
Is B541-SR stronger than B541-A?
Yes. B541-SR has a typical yield strength of 560 MPa (81.2 ksi) against 200 MPa (29 ksi) for B541-A — about 180% more. Tensile strength is 700 MPa (102 ksi) vs 430 MPa (62.4 ksi).
Which condition does FabDigit quote by default, A or SR?
HT-CW is the default B541 condition in the FabDigit quote flow (neither A nor SR). 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, B541-A or B541-SR?
B541-SR. Its machinability rates fair (38/100) against poor (30/100) for B541-A.
Ready to make it?
Upload a CAD file and FabDigit prices the part in B541-A and B541-SR 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.