Stainless Steel 15-7 Mo-RH950 vs 15-7 Mo-TH1050
Stainless Steel · 15-7 Mo temper comparison
15-7 Mo-RH950 and 15-7 Mo-TH1050 are two conditions of the same stainless steel grade, 15-7 Mo: RH950 (austenite conditioned at 954 °C, refrigerated −73 °C, aged 510 °C) versus TH1050 (austenite conditioned at 760 °C, cooled, then aged 566 °C). The chemistry is identical, so every difference below comes from the condition. 15-7 Mo-RH950 is the stronger of the two: yield strength 1,520 MPa (220 ksi) against 1,345 MPa (195 ksi) for 15-7 Mo-TH1050, about 13% more; tensile strength follows at 1,620 MPa (235 ksi) vs 1,415 MPa (205 ksi). In exchange, 15-7 Mo-TH1050 is the more ductile: elongation 7% versus 6% for 15-7 Mo-RH950, and 15-7 Mo-RH950 is harder (48 HRC vs 45 HRC). 15-7 Mo-TH1050 runs hotter in service (425°C vs 370°C continuous).
15-7 Mo-RH950Choose it when strength drives the design.
15-7 Mo-TH1050Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
15-7 Mo-RH950 vs 15-7 Mo-TH1050: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all stainless steel 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 stainless steel 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, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Hardness, Brinell 200 HB · Hardness, Rockwell B 92 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.8 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,440°C2,624 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 16 W/m·K9.2 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.5 µm/m·K6.4 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.1 % IACS · Electrical Resistivity 8.3×10⁻⁷ Ω·m32.7 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V
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 50 / 100 · Brazeability / Solderability 40 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 68 MJ/kg29,235 BTU/lb · Embodied Carbon (primary production) 5.4 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
15-7 Mo-RH950 vs 15-7 Mo-TH1050 — frequently asked
Is 15-7 Mo-RH950 stronger than 15-7 Mo-TH1050?
Yes. 15-7 Mo-RH950 has a typical yield strength of 1,520 MPa (220 ksi) against 1,345 MPa (195 ksi) for 15-7 Mo-TH1050 — about 13% more. Tensile strength is 1,620 MPa (235 ksi) vs 1,415 MPa (205 ksi).
Which condition does FabDigit quote by default, RH950 or TH1050?
Condition A is the default 15-7 Mo condition in the FabDigit quote flow (neither RH950 nor TH1050). 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, 15-7 Mo-RH950 or 15-7 Mo-TH1050?
15-7 Mo-TH1050, by a small margin. Both rate poor for machinability — 28/100 against 22/100 for 15-7 Mo-RH950.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 15-7 Mo-RH950 and 15-7 Mo-TH1050 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.