Nickel Alloy Alloy 42-H vs Alloy 42-SR
Nickel Alloy · Alloy 42 temper comparison
Alloy 42-H and Alloy 42-SR are two conditions of the same nickel alloy grade, Alloy 42: H (hardened) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Alloy 42-H is the stronger of the two: yield strength 720 MPa (104 ksi) against 560 MPa (81.2 ksi) for Alloy 42-SR, about 29% more; tensile strength follows at 800 MPa (116 ksi) vs 680 MPa (98.6 ksi). In exchange, Alloy 42-SR is the more ductile: elongation 12% versus 3% for Alloy 42-H, and Alloy 42-H is harder (247 HB vs 200 HB). Alloy 42-SR runs hotter in service (400°C vs 300°C continuous). On the shop floor, Alloy 42-SR welds better (68 vs 58 out of 100).
Alloy 42-HChoose it when strength drives the design.
Alloy 42-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Alloy 42-H vs Alloy 42-SR: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all nickel alloy 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 nickel alloy 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
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 57 GPa8.3 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.28
Physical
Density and transition temperatures.
Same in both: Density 8.12 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 10.5 W/m·K6.1 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 4.9 µm/m·K2.7 µin/in·°F · Latent Heat of Fusion 275 J/g118 BTU/lb · Min Service Temperature -196°C-321 °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) -0.45 V · Corrosion Resistance 32 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 80 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 85 MJ/kg36,543 BTU/lb · Embodied Carbon (primary production) 6.5 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 25%
Strength versus weight
Yield strength against density for every nickel alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Alloy 42-H vs Alloy 42-SR — frequently asked
Is Alloy 42-H stronger than Alloy 42-SR?
Yes. Alloy 42-H has a typical yield strength of 720 MPa (104 ksi) against 560 MPa (81.2 ksi) for Alloy 42-SR — about 29% more. Tensile strength is 800 MPa (116 ksi) vs 680 MPa (98.6 ksi).
Which condition does FabDigit quote by default, H or SR?
Annealed is the default Alloy 42 condition in the FabDigit quote flow (neither H 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 welds better, Alloy 42-H or Alloy 42-SR?
Alloy 42-SR. Its weldability rates good (68/100) against good (58/100) for Alloy 42-H.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 42-H and Alloy 42-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.