Steel A572 Gr 50 Annealed vs A572 Gr 50-HR
Steel · A572 Gr 50 temper comparison
A572 Gr 50 Annealed and A572 Gr 50-HR are two conditions of the same steel grade, A572 Gr 50: Annealed versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. A572 Gr 50-HR is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 300 MPa (43.5 ksi) for A572 Gr 50 Annealed, about 27% more; tensile strength follows at 485 MPa (70.3 ksi) vs 450 MPa (65.3 ksi). In exchange, A572 Gr 50 Annealed is the more ductile: elongation 30% versus 21% for A572 Gr 50-HR, and A572 Gr 50-HR is harder (150 HB vs 130 HB).
A572 Gr 50 AnnealedChoose it when the part is bent, formed or impact-loaded.
A572 Gr 50-HRChoose it when strength drives the design.
A572 Gr 50 Annealed vs A572 Gr 50-HR: 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.
A572 Gr 50 AnnealedA572 Gr 50-HR
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Reduction in Area 50% · Compressive Strength 380 MPa55.1 ksi · Shear Strength 290 MPa42.1 ksi · Fatigue Strength (Endurance Limit) 240 MPa34.8 ksi · Fracture Toughness (K_IC) 85 MPa·√m77.4 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,510°C2,750 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 50 W/m·K28.9 BTU/hr·ft·°F · 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 · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 8.6 % IACS · Electrical Resistivity 2×10⁻⁷ Ω·m7.87 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 12 / 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 45 / 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 40%
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.
A572 Gr 50 Annealed vs A572 Gr 50-HR — frequently asked
Is A572 Gr 50-HR stronger than A572 Gr 50 Annealed?
Yes. A572 Gr 50-HR has a typical yield strength of 380 MPa (55.1 ksi) against 300 MPa (43.5 ksi) for A572 Gr 50 Annealed — about 27% more. Tensile strength is 485 MPa (70.3 ksi) vs 450 MPa (65.3 ksi).
Which condition does FabDigit quote by default, Annealed or HR?
HR is the default A572 Gr 50 condition in the FabDigit quote flow. 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, A572 Gr 50 Annealed or A572 Gr 50-HR?
A572 Gr 50 Annealed, by a small margin. Both rate good for machinability — 65/100 against 58/100 for A572 Gr 50-HR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A572 Gr 50 Annealed and A572 Gr 50-HR 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.