Material Selection

Compare candidate materials on stiffness, strength and density.

🔧 Material Selection Guide

Compare engineering materials by properties, applications, and weighted scoring

Application Filter

Application Category

Min Yield Strength

MPa

Max Density

kg/m³

Min Max Temp

°C

Min Corrosion Resistance

23 of 23 materials match

Priority Weights (1-10)

Strength Priority

Lightweight Priority

Low Cost Priority

Machinability Priority

Corrosion Resistance Priority

Temperature Priority

Compare Materials

Primary Material

Compare With

AISI 4140 (Chrome-Moly)

Category: Alloy Steel

Applications:

Gears
Shafts
Tooling
High-stress components

Top Ranked Materials

#117-4 PH Stainless

6.4

Stainless Steel • σy: 1170 MPa • ρ: 7780 kg/m³

#26061-T6 Aluminum

6.3

Aluminum • σy: 276 MPa • ρ: 2700 kg/m³

#3Delrin (Acetal/POM)

6.3

Plastic • σy: 70 MPa • ρ: 1410 kg/m³

#4Ti-6Al-4V (Grade 5)

6.2

Titanium • σy: 880 MPa • ρ: 4430 kg/m³

#5ABS

6.1

Plastic • σy: 45 MPa • ρ: 1050 kg/m³

#6Nylon 6/6

6.0

Plastic • σy: 85 MPa • ρ: 1140 kg/m³

#7316 Stainless Steel

5.8

Stainless Steel • σy: 290 MPa • ρ: 8000 kg/m³

#87075-T6 Aluminum

5.8

Aluminum • σy: 503 MPa • ρ: 2810 kg/m³

#9Glass Fiber (Epoxy)

5.8

Composite • σy: 300 MPa • ρ: 1900 kg/m³

#10304 Stainless Steel

5.7

Stainless Steel • σy: 215 MPa • ρ: 8000 kg/m³

AISI 4140 (Chrome-Moly) Properties

Density

7850.00kg/m³

Young's Modulus

210.00GPa

Yield Strength

655.00MPa

Tensile Strength

1020.00MPa

Elongation

18.00%

Max Temperature

450.00°C

Thermal & Electrical

Thermal Conductivity

42.60W/m·K

Thermal Expansion

12.20µm/m·K

Elec. Conductivity

8.00% IACS

Relative Cost

1.50×

Manufacturing Ratings

Machinability7/10

Weldability5/10

Corrosion Resistance4/10

Hardness

28 HRC/HB

Property Comparison

Strength vs Density

Carbon Steel

Alloy Steel

Stainless Steel

Aluminum

Titanium

Copper

Nickel Alloy

Plastic

Composite

Strength-to-Weight Ratio

Detailed Comparison

Property	AISI 4140 (Chrome-Moly)	6061-T6 Aluminum	Unit
Density	7850	2700	kg/m³
Young's Modulus	210	68.9	GPa
Yield Strength	655	276	MPa
Tensile Strength	1020	310	MPa
Elongation	18	12	%
Thermal Conductivity	42.6	167	W/m·K
Thermal Expansion	12.2	23.6	µm/m·K
Max Temperature	450	150	°C
Elec. Conductivity	8	43	% IACS
Corrosion Resistance	4	8	/10
Machinability	7	9	/10
Relative Cost	1.5	2.5	×

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