Steel 35A250-A vs 35A250-C
Steel · 35A250 temper comparison
35A250-A and 35A250-C are two conditions of the same steel grade, 35A250: A (solution annealed) versus C (organic (resin) insulation coating, high interlaminar resistance). The chemistry is identical, so every difference below comes from the condition. Both yield at about 370 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (solution annealed versus organic (resin) insulation coating, high interlaminar resistance). 35A250-A runs hotter in service (230°C vs 180°C continuous). On the shop floor, 35A250-A welds better (good vs poor).
35A250-AChoose it when the part sees heat, or when it will be welded.
35A250-A vs 35A250-C: 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.
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 · Tensile Strength (Ultimate) 500 MPa72.5 ksi · Yield Strength (0.2% offset) 370 MPa53.7 ksi · Elongation at Break 16% · Shear Strength 380 MPa55.1 ksi · Fatigue Strength (Endurance Limit) 260 MPa37.7 ksi · Charpy V-Notch Impact (RT) 8 J5.9 ft·lbf · Hardness, Rockwell B 88 HRB · Hardness, Vickers 180 HV
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.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 23 W/m·K13.3 BTU/hr·ft·°F · 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.
Same in both: Electrical Conductivity 3.3 % IACS · Electrical Resistivity 5.2×10⁻⁷ Ω·m20.5 µΩ·in
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.
Weldability
Formability (cold)
Same in both: Machinability 40 / 100 · Machinability Rating (AISI 1212 = 100 %) 50% · 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-C — frequently asked
What is the difference between 35A250-A and 35A250-C?
35A250-A and 35A250-C are two conditions of the same steel grade, 35A250: A (solution annealed) versus C (organic (resin) insulation coating, high interlaminar resistance). The chemistry is identical, so every difference below comes from the condition. Both yield at about 370 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (solution annealed versus organic (resin) insulation coating, high interlaminar resistance).
Which condition does FabDigit quote by default, A or C?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which welds better, 35A250-A or 35A250-C?
35A250-A. Its weldability rates good (60/100) against poor (25/100) for 35A250-C.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 35A250-A and 35A250-C 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.