Steel M140-30P vs M19
Steel · grade comparison
Steel M140-30P and M19 are both steel grades. M19 is the stronger of the two: yield strength 340 MPa (49.3 ksi) against 315 MPa (45.7 ksi) for M140-30P, about 8% more; tensile strength follows at 460 MPa (66.7 ksi) vs 335 MPa (48.6 ksi). M19 is the more ductile: elongation 25% versus 10% for M140-30P, and M140-30P is harder (180 HV vs 150 HV). M19 is stiffer (200 GPa vs 120 GPa) and M19 runs hotter in service (200°C vs 150°C continuous). On the shop floor, M19 machines more easily (fair vs poor) and M19 welds better (fair vs poor).
M19Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
M140-30P vs M19: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Rockwell B
Hardness, Vickers
Reduction in Area
Same in both: Bulk Modulus 160 GPa23.2 Msi
Physical
Density and transition temperatures.
Liquidus Temperature
Same in both: Density 7.65 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,480°C2,696 °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)
Min Service Temperature
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
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)
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 | M140-30P | M19 |
|---|---|---|
| Sheet metal | — | Yes |
| Default condition | — | 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.
M140-30P vs M19 — frequently asked
Is M19 stronger than M140-30P?
Yes. M19 has a typical yield strength of 340 MPa (49.3 ksi) against 315 MPa (45.7 ksi) for M140-30P — about 8% more. Tensile strength is 460 MPa (66.7 ksi) vs 335 MPa (48.6 ksi).
Which is cheaper, M140-30P or M19?
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, M140-30P or M19?
M19. Its machinability rates fair (45/100) against poor (30/100) for M140-30P; for welding the order is M19 first (fair, 50/100) then M140-30P (poor, 30/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in M140-30P and M19 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.