Steel 35A250-A vs 35A250-SRA
Steel · 35A250 temper comparison
35A250-A and 35A250-SRA are two conditions of the same steel grade, 35A250: A (solution annealed) versus SRA (stress-relief annealed after blanking). The chemistry is identical, so every difference below comes from the condition. 35A250-A is the stronger of the two: yield strength 370 MPa (53.7 ksi) against 340 MPa (49.3 ksi) for 35A250-SRA, about 9% more; tensile strength follows at 500 MPa (72.5 ksi) vs 470 MPa (68.2 ksi). In exchange, 35A250-SRA is the more ductile: elongation 22% versus 16% for 35A250-A, and 35A250-A is harder (180 HV vs 165 HV). 35A250-A runs hotter in service (230°C vs 200°C continuous). On the shop floor, 35A250-A welds better (good vs fair).
35A250-AChoose it when strength drives the design, or when the part sees heat.
35A250-SRAChoose it when the part is bent, formed or impact-loaded.
35A250-A vs 35A250-SRA: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 190 GPa27.6 Msi · Shear Modulus 74 GPa10.7 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.6 g/cm³0.27 lb/in³ · Melting Point (Solidus) 1,480°C2,696 °F · Liquidus Temperature 1,510°C2,750 °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) 11.8 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 260 J/g112 BTU/lb · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V
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 45 / 100 · Polishability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 32 MJ/kg13,758 BTU/lb · Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 15%
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.
35A250-A vs 35A250-SRA — frequently asked
Is 35A250-A stronger than 35A250-SRA?
Yes. 35A250-A has a typical yield strength of 370 MPa (53.7 ksi) against 340 MPa (49.3 ksi) for 35A250-SRA — about 9% more. Tensile strength is 500 MPa (72.5 ksi) vs 470 MPa (68.2 ksi).
Which condition does FabDigit quote by default, A or SRA?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, 35A250-A or 35A250-SRA?
35A250-SRA, by a small margin. Both rate fair for machinability — 45/100 against 40/100 for 35A250-A; for welding the order is 35A250-A first (good, 60/100) then 35A250-SRA (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 35A250-A and 35A250-SRA 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.