Steel 30Q130 vs FeSi75
Steel · grade comparison
Steel 30Q130 and FeSi75 are both steel grades. 30Q130 is the stronger of the two: tensile strength 345 MPa (50 ksi) against 120 MPa (17.4 ksi) for FeSi75, about 188% more. 30Q130 is the more ductile: elongation 8% versus 0% for FeSi75, and FeSi75 is harder (900 HV vs 170 HV). FeSi75 is lighter (3 g/cm³ vs 7.65 g/cm³ for 30Q130) and FeSi75 is stiffer (160 GPa vs 120 GPa). On the shop floor, 30Q130 machines more easily (fair vs not recommended), 30Q130 welds better (fair vs not recommended), and FeSi75 sits in a lower cost tier (budget, $) than 30Q130 (standard, $$).
30Q130Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
FeSi75Choose it when weight is the constraint, or when the part sees heat.
30Q130 vs FeSi75: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Reduction in Area
Compressive Strength
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Rockwell C
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)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
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 Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
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 | 30Q130 | FeSi75 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $ Budget |
| 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.
30Q130 vs FeSi75 — frequently asked
Is 30Q130 stronger than FeSi75?
Yes. 30Q130 has a typical tensile strength of 345 MPa (50 ksi) against 120 MPa (17.4 ksi) for FeSi75 — about 188% more.
Which is cheaper, 30Q130 or FeSi75?
FeSi75 is the lower-cost material: it sits in the budget tier ($) while 30Q130 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, 30Q130 or FeSi75?
30Q130. Its machinability rates fair (40/100) against not recommended (3/100) for FeSi75; for welding the order is 30Q130 first (fair, 35/100) then FeSi75 (not recommended, 3/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 30Q130 and FeSi75 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.