Steel 4335V (Modified 4340) vs H11
Steel · grade comparison
Steel 4335V (Modified 4340) and H11 are both steel grades. 4335V (Modified 4340) is the stronger of the two: yield strength 1,380 MPa (200 ksi) against 510 MPa (74 ksi) for H11, about 171% more; tensile strength follows at 1,520 MPa (220 ksi) vs 800 MPa (116 ksi). In exchange, H11 is the more ductile: elongation 20% versus 12% for 4335V (Modified 4340), and 4335V (Modified 4340) is harder (440 HB vs 200 HB). H11 runs hotter in service (540°C vs 300°C continuous) and 4335V (Modified 4340) conducts heat better (42 W/m·K vs 25 W/m·K). On the shop floor, H11 machines more easily (good vs poor), H11 welds better (fair vs poor), and H11 sits in a lower cost tier (standard, $$) than 4335V (Modified 4340) (high, $$$$).
4335V (Modified 4340)Choose it when strength drives the design.
H11Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
4335V (Modified 4340) vs H11: 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
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 C
Hardness, Vickers
Hardness, Rockwell B
Same in both: Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Latent Heat of Fusion 250 J/g107 BTU/lb
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)
Brazeability / Solderability
Polishability
Castability
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb
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 | 4335V (Modified 4340) | H11 |
|---|---|---|
| CNC machining | — | Yes |
| Default condition | — | Annealed |
| Relative cost | $$$$ High | $$ Standard |
| Min. machined wall | — | 0.8 mm |
| Best machined surface | — | Ra 1.6 µm |
| AlCrN | — | Yes |
| AlTiN | — | Yes |
| Black Oxide | — | Yes |
| CVD Al2O3 | — | Yes |
| CVD TiCN | — | Yes |
| CVD TiN | — | Yes |
| Cerakote | — | Yes |
| Chrome Plating | — | Yes |
| CrN | — | Yes |
| DLC | — | Yes |
| E-Coating | — | Yes |
| HVOF Coating | — | Yes |
| Hot-Dip Galvanizing | — | Yes |
| MoS2 | — | Yes |
| Multilayer CVD | — | Yes |
| Nickel Plating | — | Yes |
| PTFE Coating | — | Yes |
| Painting | — | 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.
4335V (Modified 4340) vs H11 — frequently asked
Is 4335V (Modified 4340) stronger than H11?
Yes. 4335V (Modified 4340) has a typical yield strength of 1,380 MPa (200 ksi) against 510 MPa (74 ksi) for H11 — about 171% more. Tensile strength is 1,520 MPa (220 ksi) vs 800 MPa (116 ksi).
Which is cheaper, 4335V (Modified 4340) or H11?
H11 is the lower-cost material: it sits in the standard tier ($$) while 4335V (Modified 4340) is high ($$$$). 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, 4335V (Modified 4340) or H11?
H11. Its machinability rates good (55/100) against poor (22/100) for 4335V (Modified 4340); for welding the order is H11 first (fair, 35/100) then 4335V (Modified 4340) (poor, 22/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 4335V (Modified 4340) and H11 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.