Chemical Composition Base Element Fe (Iron) C (Carbon) 0.4 % Cr (Chromium) 0.8 to 1.1 % Fe (Iron) 98.2 to 98.7 % (estimate) Mo (Molybdenum) 0.15 to 0.25 % Balance Fe (Iron) Composition Note Fe is listed as a Balance element for this material, but its % value is not listed in the specification. The value shown is a calculated one. Mechanical Properties Yield Strength 655 MPa Ultimate Tensile Strength 896 MPa Elongation 15 % strain Brinell Hardness 270 Other Information Material Class Ferrous Alloy Country USA Description Rolled: 130,000 TS; 95,000 YS; 15 El; 40 RA; 270 HB; Annealed: 90,000 TS; 65,000 YS; 27 El; 55 RA; 185 HB; For gears, shafts, axles, fittings, bolts; oil hardened. Designation ARISTOLOY 4140 Specification Type Manufacturer's Specification Specification Status Obsolete Source Woldman's Engineering Alloys 9th ed. J. Frick Editor, ASM International 2000 Available forms Shaft Similar Alloys Click here to find similar alloys
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Chemical Composition

Base Element

Fe (Iron)

C (Carbon)

0.4

Cr (Chromium)

0.8 to 1.1

Fe (Iron)

98.2 to 98.7

% (estimate)

Mo (Molybdenum)

0.15 to 0.25

Balance

Fe (Iron)

Composition Note

Fe is listed as a Balance element for this material, but its % value is not listed in the specification. The value shown is a calculated one.

Mechanical Properties

Yield Strength

655

MPa

Ultimate Tensile Strength

896

MPa

Elongation

% strain

Brinell Hardness

270

Other Information

Material Class

Ferrous Alloy

Country

USA

Description

Rolled: 130,000 TS; 95,000 YS; 15 El; 40 RA; 270 HB; Annealed: 90,000 TS; 65,000 YS; 27 El; 55 RA; 185 HB; For gears, shafts, axles, fittings, bolts; oil hardened.

Designation

ARISTOLOY 4140

Specification Type

Manufacturer's Specification

Specification Status

Obsolete

Source

Woldman's Engineering Alloys 9th ed. J. Frick Editor, ASM International 2000

Available forms

Shaft

Similar Alloys

Click here to find similar alloys

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