Steel 35W250 vs E3404
Steel · grade comparison
Steel 35W250 and E3404 are both steel grades. 35W250 is the stronger of the two: yield strength 360 MPa (52.2 ksi) against 310 MPa (45 ksi) for E3404, about 16% more; tensile strength follows at 480 MPa (69.6 ksi) vs 350 MPa (50.8 ksi). 35W250 is the more ductile: elongation 12% versus 10% for E3404, and E3404 is harder (89 HRB vs 82 HRB). 35W250 is stiffer (195 GPa vs 115 GPa) and E3404 runs hotter in service (200°C vs 180°C continuous). On the shop floor, 35W250 machines more easily (45 vs 35 out of 100).
35W250Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
E3404Choose it when the part sees heat.
35W250 vs E3404: 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.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Rockwell B
Same in both: Hardness, Brinell 180 HB · Hardness, Vickers 190 HV
Physical
Density and transition temperatures.
Melting Point (Solidus)
Same in both: Density 7.65 g/cm³0.28 lb/in³ · Liquidus Temperature 1,510°C2,750 °F
Thermal
How each material carries heat and how hot it can run.
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 24 W/m·K13.9 BTU/hr·ft·°F · Latent Heat of Fusion 260 J/g112 BTU/lb · Min Service Temperature -60°C-76 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 18 / 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 30 / 100 · Polishability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Same in both: Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 15%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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 | 35W250 | E3404 |
|---|---|---|
| Sheet metal | Yes | — |
| Default condition | Final Annealed | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
| Black Oxide | Yes | — |
| Cerakote | Yes | — |
| Chrome Plating | Yes | — |
| E-Coating | Yes | — |
| Hot-Dip Galvanizing | Yes | — |
| Nickel Plating | Yes | — |
| PTFE Coating | Yes | — |
| Painting | Yes | — |
| Powder Coating | Yes | — |
| Tin Plating | Yes | — |
| Zinc Plating | Yes | — |
| Zinc-Flake (Dip-Spin) Coating | Yes | — |
| Zinc-Nickel Plating | Yes | — |
They share 9 finishes: Copper Plating, Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Manganese Phosphate, Plasma Spray, Silver Plating, Zinc Phosphate.
35W250 vs E3404 — frequently asked
Is 35W250 stronger than E3404?
Yes. 35W250 has a typical yield strength of 360 MPa (52.2 ksi) against 310 MPa (45 ksi) for E3404 — about 16% more. Tensile strength is 480 MPa (69.6 ksi) vs 350 MPa (50.8 ksi).
Which is cheaper, 35W250 or E3404?
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, 35W250 or E3404?
35W250, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for E3404; for welding the order is 35W250 first (fair, 35/100) then E3404 (poor, 30/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 35W250 and E3404 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.