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• Felipe Salinas Espinoza

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AISI 5160 Alloy Steel (UNS G51600)

AISI 5160 Alloy Steel (UNS G51600) Topics Covered Introduction Chemical Composition Physical Properties Mechanical Properties Thermal Properties Other Designations Fabrication and Heat Treatment Machinability Welding Heat Treatment Forging Annealing Applications

Introduction Alloy steels are designated by AISI four-digit numbers. They are more responsive to heat and mechanical treatments than carbon steels. They comprise various types of steels having compositions which exceed the limitations of Va, Cr, Si, Ni, Mo, C and B in the carbon steels. The following datasheet will provide more details about AISI A5160 alloy steel, which has high ductility, excellent toughness and high tensile-yield ratio.

Chemical Composition The chemical composition of AISI 5160 alloy steel is listed in the following table. Element

Content (%)

Iron, Fe

97.085 - 97.84

Manganese, Mn

0.750 - 1

Chromium, Cr

0.7 - 0.9

Carbon, C

0.560 - 0.640

Phosphorous, P

≤ 0.0350

Silicon, Si

0.150 - 0.3

Sulfur, S

≤ 0.04

Physical Properties The following table shows the physical properties of AISI 5160 alloy steel. Properties Density

Metric 7.85

g/cm3

Imperial 0.284 lb/in³

Mechanical Properties The mechanical properties of AISI 5160 alloy steel are outlined in the following table. Properties

Metric

Imperial

Tensile strength, ultimate

724 MPa

105000 psi

Tensile strength, yield

275 MPa

39900 psi

190-210

27557-30458

GPa

ksi

Bulk modulus (typical for steel)

140 GPa

20300 ksi

Shear modulus (typical for steels)

80 GPa

11600 ksi

0.27 – 0.30

0.27-0.30

Modulus of elasticity

Poissons ratio

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AISI 5160 Alloy Steel (UNS G51600)

Elongation at break (in 50mm)

17.20%

17.20%

Hardness, Brinell

197

197

Hardness, Knoop (converted from Brinell hardness)

219

219

Hardness, Rockwell B (converted from Brinell hardness)

92

92

13

13

Hardness, Vickers (converted from Brinell hardness)

207

207

Machinability (spheroidized annealed and cold drawn. Based on 100% machinability for AISI 1212 steel)

55

55

Hardness, Rockwell C (converted from Brinell hardness, value below normal HRC range, for comparison purposes only)

Thermal Properties The thermal properties of AISI 5160 alloy steel are outlined in the following table. Properties Thermal conductivity

Metric

Imperial

46.6 W/mK

323 BTU in/hr.ft2. °F

Other Designations Other designations that are equivalent to AISI 5160 alloy steel include the following: ASTM A29 ASTM A322 ASTM A331 ASTM A505 ASTM A519 ASTM A752 ASTM A829 SAE J1397 SAE J404 SAE J412 SAE J770

Fabrication and Heat Treatment Machinability Machining 5160 alloy steel is difficult in “as rolled” condition. Hence, the steel should be annealed before machining to obtain maximum speeds.

Welding AISI 5160 alloy steel has poor welding property owing to its high chromium and carbon content. Either arc or gas welding methods can be used to weld the steel.

Heat Treatment AISI 5160 alloy steel is generally hardened using oil. This steel is quenched at 829°C (1525°F) and tempered at temperatures ranging from 427 and 704°C (800 and 1300°F).

Forging Forging of 5160 alloy steel is performed at temperatures between 1149 and 1204°C (2100 and 2200°F).

Annealing

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AISI 5160 Alloy Steel (UNS G51600)

AISI 5160 alloy steel is annealed at 788°C (1450°F) and then air cooled.

Applications AISI 5160 alloy steel is suitable for manufacturing leaf springs used in automotive field. Date Added: Sep 6, 2012 | Updated: Jun 11, 2013

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