Steel E335 QT-200HB vs E335 QT-28-32HRC
Steel · E335 temper comparison
E335 QT-200HB and E335 QT-28-32HRC are two conditions of the same steel grade, E335: QT-200HB (+QT) versus QT-28-32HRC (+QT). The chemistry is identical, so every difference below comes from the condition. E335 QT-28-32HRC is the stronger of the two: yield strength 680 MPa (98.6 ksi) against 470 MPa (68.2 ksi) for E335 QT-200HB, about 45% more; tensile strength follows at 900 MPa (131 ksi) vs 700 MPa (102 ksi). In exchange, E335 QT-200HB is the more ductile: elongation 18% versus 15% for E335 QT-28-32HRC, and E335 QT-28-32HRC is harder (285 HB vs 215 HB).
E335 QT-200HBChoose it when the part is bent, formed or impact-loaded.
E335 QT-28-32HRCChoose it when strength drives the design.
E335 QT-200HB vs E335 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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
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
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 247 J/g106 BTU/lb · Max Service Temperature (continuous) 350°C662 °F · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 10 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 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: Brazeability / Solderability 55 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 2 kg CO₂/kg · Embodied Water 40 L/kg4.8 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.
E335 QT-200HB vs E335 QT-28-32HRC — frequently asked
Is E335 QT-28-32HRC stronger than E335 QT-200HB?
Yes. E335 QT-28-32HRC has a typical yield strength of 680 MPa (98.6 ksi) against 470 MPa (68.2 ksi) for E335 QT-200HB — about 45% more. Tensile strength is 900 MPa (131 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, QT-200HB or QT-28-32HRC?
+AR is the default E335 condition in the FabDigit quote flow (neither QT-200HB 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 welds better, E335 QT-200HB or E335 QT-28-32HRC?
E335 QT-200HB. Its weldability rates fair (38/100) against poor (30/100) for E335 QT-28-32HRC.
Ready to make it?
Upload a CAD file and FabDigit prices the part in E335 QT-200HB and E335 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.