Steel A536 100-70-03 vs A536 65-45-12
Steel · grade comparison
Steel A536 100-70-03 and A536 65-45-12 are both steel grades. A536 100-70-03 is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 340 MPa (49.3 ksi) for A536 65-45-12, about 53% more; tensile strength follows at 760 MPa (110 ksi) vs 480 MPa (69.6 ksi). In exchange, A536 65-45-12 is the more ductile: elongation 14% versus 4% for A536 100-70-03, and A536 100-70-03 is harder (241 HB vs 170 HB). A536 100-70-03 runs hotter in service (400°C vs 350°C continuous). On the shop floor, A536 65-45-12 machines more easily (68 vs 55 out of 100) and A536 65-45-12 welds better (fair vs poor).
A536 100-70-03Choose it when strength drives the design, or when the part sees heat.
A536 65-45-12Choose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
A536 100-70-03 vs A536 65-45-12: 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.
Bulk Modulus
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, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 169 GPa24.5 Msi · Shear Modulus 65 GPa9.4 Msi · Poisson's Ratio 0.28
Physical
Density and transition temperatures.
Liquidus Temperature
Same in both: Density 7.1 g/cm³0.26 lb/in³ · Melting Point (Solidus) 1,150°C2,102 °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 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 220 J/g94.6 BTU/lb · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.9 % IACS · Electrical Resistivity 6×10⁻⁷ Ω·m23.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 15 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Polishability
Same in both: Brazeability / Solderability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Same in both: Embodied Carbon (primary production) 1.7 kg CO₂/kg · Typical Recycled Content 85%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 23.8 MN·m/kg
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.
Manufacturing and finishing
| Capability | A536 100-70-03 | A536 65-45-12 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 9 finishes: Copper Plating, Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Manganese Phosphate, Plasma Spray, Silver Plating, Zinc Phosphate.
A536 100-70-03 vs A536 65-45-12 — frequently asked
Is A536 100-70-03 stronger than A536 65-45-12?
Yes. A536 100-70-03 has a typical yield strength of 520 MPa (75.4 ksi) against 340 MPa (49.3 ksi) for A536 65-45-12 — about 53% more. Tensile strength is 760 MPa (110 ksi) vs 480 MPa (69.6 ksi).
Which is cheaper, A536 100-70-03 or A536 65-45-12?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, A536 100-70-03 or A536 65-45-12?
A536 65-45-12, by a small margin. Both rate good for machinability — 68/100 against 55/100 for A536 100-70-03; for welding the order is A536 65-45-12 first (fair, 35/100) then A536 100-70-03 (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A536 100-70-03 and A536 65-45-12 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.