FabDigit

EN24T vs AR400 and 2 more: properties

EN24TAR400AR500A514

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Tensile Strength (Ultimate)

900 MPa131 ksi
1,250 MPa181 ksi
1,650 MPa239 ksi
800 MPa116 ksi

Yield Strength (0.2% offset)

560 MPa81.2 ksi
1,050 MPa152 ksi
1,350 MPa196 ksi
760 MPa110 ksi

Elongation at Break

16%
11%
9%
19%

Reduction in Area

45%
40%
30%
50%

Compressive Strength

580 MPa84.1 ksi
1,100 MPa160 ksi
1,400 MPa203 ksi
760 MPa110 ksi

Shear Strength

540 MPa78.3 ksi
780 MPa113 ksi
1,000 MPa145 ksi
480 MPa69.6 ksi

Fatigue Strength (Endurance Limit)

430 MPa62.4 ksi
520 MPa75.4 ksi
700 MPa102 ksi
380 MPa55.1 ksi

Fracture Toughness (K_IC)

85 MPa·√m77.4 ksi·√in
70 MPa·√m63.7 ksi·√in
50 MPa·√m45.5 ksi·√in
120 MPa·√m109 ksi·√in

Charpy V-Notch Impact (RT)

35 J25.8 ft·lbf
30 J22.1 ft·lbf
35 J25.8 ft·lbf
75 J55.3 ft·lbf

Hardness, Brinell

265 HB
400 HB
500 HB
250 HB

Hardness, Rockwell C

26 HRC
43 HRC
50 HRC
24 HRC

Hardness, Vickers

278 HV
420 HV
525 HV
262 HV

Hardness, Rockwell B

100 HRB

Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29

Physical

Density and transition temperatures.

Melting Point (Solidus)

1,420°C2,588 °F
1,420°C2,588 °F
1,420°C2,588 °F
1,425°C2,597 °F

Liquidus Temperature

1,480°C2,696 °F
1,500°C2,732 °F
1,500°C2,732 °F
1,510°C2,750 °F

Same in both: Density 7.85 g/cm³0.28 lb/in³

Thermal

How each material carries heat and how hot it can run.

Thermal Conductivity

44 W/m·K25.4 BTU/hr·ft·°F
42 W/m·K24.3 BTU/hr·ft·°F
40 W/m·K23.1 BTU/hr·ft·°F
42 W/m·K24.3 BTU/hr·ft·°F

Thermal Expansion (CTE, 20–100 °C)

12.3 µm/m·K6.8 µin/in·°F
12 µm/m·K6.7 µin/in·°F
12 µm/m·K6.7 µin/in·°F
12 µm/m·K6.7 µin/in·°F

Latent Heat of Fusion

250 J/g107 BTU/lb
250 J/g107 BTU/lb
270 J/g116 BTU/lb
250 J/g107 BTU/lb

Max Service Temperature (continuous)

400°C752 °F
250°C482 °F
250°C482 °F
400°C752 °F

Min Service Temperature

-40°C-40 °F
-20°C-4 °F
-40°C-40 °F
-45°C-49 °F

Same in both: Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F

Electrical

Conductivity and insulation.

Electrical Conductivity

7.8 % IACS
8 % IACS
7.5 % IACS
7 % IACS

Electrical Resistivity

2.2×10⁻⁷ Ω·m8.66 µΩ·in
2.2×10⁻⁷ Ω·m8.66 µΩ·in
2.3×10⁻⁷ Ω·m9.06 µΩ·in
2.4×10⁻⁷ Ω·m9.45 µΩ·in

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Galvanic Potential (seawater, vs SCE)

-0.61 V
-0.62 V
-0.6 V

Corrosion Resistance

12 / 100
12 / 100
13 / 100
16 / 100

Manufacturability

FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.

Machinability

46 / 100
22 / 100
12 / 100
38 / 100

Machinability Rating (AISI 1212 = 100 %)

48%
20%
10%
40%

Weldability

30 / 100
55 / 100
45 / 100
55 / 100

Formability (cold)

25 / 100
25 / 100
15 / 100
30 / 100

Brazeability / Solderability

45 / 100
20 / 100
40 / 100

Polishability

70 / 100
55 / 100
55 / 100
50 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Energy (primary production)

32 MJ/kg13,758 BTU/lb
28 MJ/kg12,038 BTU/lb
30 MJ/kg12,898 BTU/lb
31 MJ/kg13,328 BTU/lb

Embodied Carbon (primary production)

2.3 kg CO₂/kg
2.3 kg CO₂/kg
2.3 kg CO₂/kg
2.4 kg CO₂/kg

Embodied Water

55 L/kg6.6 gal/lb
45 L/kg5.4 gal/lb
55 L/kg6.6 gal/lb
45 L/kg5.4 gal/lb

Typical Recycled Content

35%
25%
25%
30%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

115 kN·m/kg
159 kN·m/kg
210 kN·m/kg
102 kN·m/kg

Modulus of Resilience

765 kJ/m³
2,689 kJ/m³
4,445 kJ/m³
1,409 kJ/m³

Thermal Diffusivity

11.9 mm²/s
11.4 mm²/s
10.8 mm²/s
11.4 mm²/s

Thermal Shock Resistance Index

16
21
27
14

Same in both: Specific Stiffness (E / density) 26.1 MN·m/kg

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.

2005001,0002,0007.588.5Density (g/cm³)Yield strength (MPa) — log scaleAR400AR500A514EN24T

Manufacturing and finishing

CapabilityEN24TAR400AR500A514
Default conditionHRQ&TQ&TQ&T
Relative cost$$ Standard$$$ Premium$$$$ High$$ Standard
Min. machined wall0.8 mm0.8 mm0.8 mm0.8 mm
Best machined surfaceRa 1.6 µmRa 1.6 µmRa 1.6 µmRa 1.6 µm

Both are offered for CNC machining and Sheet metal. Both take the same 38 finishes: AlCrN, AlTiN, Black Oxide, CVD Al2O3, CVD TiCN, CVD TiN, Cerakote, Chrome Plating, Copper Plating, CrN, DLC, E-Coating and 26 more.

Ready to make it?

Upload a CAD file and FabDigit prices the part in EN24T and AR400 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.