Steel Y35-IH vs Y35 QT-28-32HRC
Steel · Y35 temper comparison
Y35-IH and Y35 QT-28-32HRC are two conditions of the same steel grade, Y35: IH (induction hardened) versus QT-28-32HRC. The chemistry is identical, so every difference below comes from the condition. Y35 QT-28-32HRC is the stronger of the two: yield strength 800 MPa (116 ksi) against 720 MPa (104 ksi) for Y35-IH, about 11% more; tensile strength follows at 965 MPa (140 ksi) vs 900 MPa (131 ksi). Y35-IH is harder — 510 HB against 293 HB for Y35 QT-28-32HRC — which matters for wear surfaces and threads. Y35 QT-28-32HRC runs hotter in service (300°C vs 200°C continuous). On the shop floor, Y35 QT-28-32HRC machines more easily (good vs poor), Y35 QT-28-32HRC welds better (poor vs not recommended), and Y35 QT-28-32HRC forms better (poor vs not recommended).
Y35-IHChoose it when surface hardness matters.
Y35 QT-28-32HRCChoose it when strength drives the design, or when the part sees heat.
Y35-IH vs Y35 QT-28-32HRC: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all 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 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.
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
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Hardness, Rockwell B 92 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,490°C2,714 °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 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.7 µm/m·K6.5 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -20°C-4 °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) -0.61 V · Corrosion Resistance 10 / 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: Castability 40 / 100 · Brazeability / Solderability 55 / 100 · Polishability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 1.9 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Y35-IH vs Y35 QT-28-32HRC — frequently asked
Is Y35 QT-28-32HRC stronger than Y35-IH?
Yes. Y35 QT-28-32HRC has a typical yield strength of 800 MPa (116 ksi) against 720 MPa (104 ksi) for Y35-IH — about 11% more. Tensile strength is 965 MPa (140 ksi) vs 900 MPa (131 ksi).
Which condition does FabDigit quote by default, IH or QT-28-32HRC?
CD is the default Y35 condition in the FabDigit quote flow (neither IH nor QT-28-32HRC). 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, Y35-IH or Y35 QT-28-32HRC?
Y35 QT-28-32HRC. Its machinability rates good (60/100) against poor (25/100) for Y35-IH; for welding the order is Y35 QT-28-32HRC first (poor, 22/100) then Y35-IH (not recommended, 8/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Y35-IH and Y35 QT-28-32HRC 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.