Steel 1126-HR vs 1126 QT-200HB
Steel · 1126 temper comparison
1126-HR and 1126 QT-200HB are two conditions of the same steel grade, 1126: HR (hot rolled) versus QT-200HB (Q&T). The chemistry is identical, so every difference below comes from the condition. 1126 QT-200HB is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 280 MPa (40.6 ksi) for 1126-HR, about 71% more; tensile strength follows at 690 MPa (100 ksi) vs 505 MPa (73.2 ksi). 1126 QT-200HB is harder — 200 HB against 143 HB for 1126-HR — which matters for wear surfaces and threads. On the shop floor, 1126-HR forms better (45 vs 35 out of 100).
1126 QT-200HBChoose it when strength drives the design, or when surface hardness matters.
1126-HR vs 1126 QT-200HB: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
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
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 1,500°C2,732 °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.
Same in both: Electrical Conductivity 10 % IACS · Electrical Resistivity 1.7×10⁻⁷ Ω·m6.69 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 11 / 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 60 / 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 35%
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.
1126-HR vs 1126 QT-200HB — frequently asked
Is 1126 QT-200HB stronger than 1126-HR?
Yes. 1126 QT-200HB has a typical yield strength of 480 MPa (69.6 ksi) against 280 MPa (40.6 ksi) for 1126-HR — about 71% more. Tensile strength is 690 MPa (100 ksi) vs 505 MPa (73.2 ksi).
Which condition does FabDigit quote by default, HR or QT-200HB?
CD is the default 1126 condition in the FabDigit quote flow (neither HR nor QT-200HB). 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, 1126-HR or 1126 QT-200HB?
1126-HR, by a small margin. Both rate very good for machinability — 76/100 against 70/100 for 1126 QT-200HB; for welding the order is 1126-HR first (poor, 30/100) then 1126 QT-200HB (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1126-HR and 1126 QT-200HB 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.