Steel 35W250 vs M400-50A
Steel · grade comparison
Steel 35W250 and M400-50A are both steel grades. 35W250 is the stronger of the two: yield strength 360 MPa (52.2 ksi) against 310 MPa (45 ksi) for M400-50A, about 16% more; tensile strength follows at 480 MPa (69.6 ksi) vs 450 MPa (65.3 ksi). In exchange, M400-50A is the more ductile: elongation 28% versus 12% for 35W250, and 35W250 is harder (180 HB vs 152 HB). M400-50A runs hotter in service (200°C vs 180°C continuous) and M400-50A conducts heat better (27 W/m·K vs 24 W/m·K). On the shop floor, M400-50A sits in a lower cost tier (budget, $) than 35W250 (standard, $$).
35W250Choose it when strength drives the design.
M400-50AChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
35W250 vs M400-50A: 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
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Bulk Modulus 160 GPa23.2 Msi · Fatigue Strength (Endurance Limit) 210 MPa30.5 ksi · Hardness, Rockwell B 82 HRB
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Same in both: Liquidus Temperature 1,510°C2,750 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Same in both: Min Service Temperature -60°C-76 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
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)
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 2.4 kg CO₂/kg
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 5
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 | M400-50A |
|---|---|---|
| Sheet metal | Yes | — |
| Default condition | Final Annealed | — |
| Relative cost | $$ Standard | $ Budget |
| 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 M400-50A — frequently asked
Is 35W250 stronger than M400-50A?
Yes. 35W250 has a typical yield strength of 360 MPa (52.2 ksi) against 310 MPa (45 ksi) for M400-50A — about 16% more. Tensile strength is 480 MPa (69.6 ksi) vs 450 MPa (65.3 ksi).
Which is cheaper, 35W250 or M400-50A?
M400-50A is the lower-cost material: it sits in the budget tier ($) while 35W250 is standard ($$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, 35W250 or M400-50A?
M400-50A, by a small margin. Both rate fair for machinability — 50/100 against 45/100 for 35W250; for welding the order is M400-50A first (fair, 40/100) then 35W250 (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 35W250 and M400-50A 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.