Chapter 2, Problem 1P

Determine the tensile and yield strengths for the following materials:

1. (a)   UNS G10200 hot-rolled steel.
2. (b)   SAE 1050 cold-drawn steel.
3. (c)   AISI 1141 steel quenched and tempered at 540°C.
4. (d)   2024-T4 aluminum alloy.
5. (e)   Ti-6A1-4V annealed titanium alloy.

To determine

The tensile and yield strength of the UNS G10200 hot-rolled steel.

Explanation of Solution

The ability of material to withstand pulling force is called as tensile strength. The tensile strength express as the force per unit area.

The amount of stress that causes permanent deformation in the material is called as yield strength. It is the maximum stress after which the material changes their shape. The material deforms permanently after the elastic limit.

Refer to the Table A-20 “Deterministic ASTM Minimum Tensile and Yield Strengths for Some Hot-Rolled (HR) and Cold-Drawn (CD) Steels” to obtain the tensile and yield strength as $380\text{MPa}$ and $210\text{MPa}$ respectively.

Thus, the tensile strength and the yield strength for the UNS G10200 hot-rolled steel is $380\text{MPa}$ and $210\text{MPa}$ respectively.

To determine

The tensile and yield strength of SAE 1050 cold-drawn steel.

Explanation of Solution

Refer to the Table A-20 “Deterministic ASTM Minimum Tensile and Yield Strengths for Some Hot-Rolled (HR) and Cold-Drawn (CD) Steels” to obtain the tensile strength and the yield strength of the SAE 1050 cold-drawn steel as $690\text{MPa}$ and $580\text{MPa}$ respectively.

Thus, the tensile strength and the yield strength of SAE 1050 cold-drawn steel is $690\text{MPa}$ and $580\text{MPa}$ respectively.

To determine

The tensile and yield strength of AISI 1141 steel quenched and tempered at $540{}^{\text{0}}\text{C}$.

Explanation of Solution

Refer to Table A-21 “Mean Mechanical Properties of some Heat-Treated Steels” to obtain the tensile and yield strength for the AISI 1141 steel quenched and tempered at $540{}^{\text{0}}\text{C}$ as $896\text{MPa}$ and $765\text{MPa}$ respectively.

Thus, the tensile strength and the yield strength of the AISI 1141 steel quenched and tempered at $540{}^{\text{0}}\text{C}$ is $896\text{MPa}$ and $765\text{MPa}$ respectively.

To determine

The tensile and yield strength of the 2024-T4 aluminum alloy.

Explanation of Solution

Refer to Table A-22 “Result of Tensile Tests of Some Metals” to obtain the tensile and yield strength of aluminum alloy as $446\text{MPa}$ and $296\text{MPa}$ respectively.

Thus, the tensile strength and the yield strength of the 2024-T4 aluminum alloy. is $446\text{MPa}$ and $296\text{MPa}$ respectively.

To determine

The tensile and yield strength of the Ti-6Al-4V annealed titanium alloy.

Explanation of Solution

Refer to Table A-24(c) “Mechanical Properties of some Titanium Alloys ” to obtain the  tensile and yield strength of Ti-6Al-4V annealed titanium alloy as $900\text{MPa}$ and $830\text{MPa}$ respectively.

Thus, the tensile strength and the yield strength of Ti-6Al-4V annealed titanium alloy is $900\text{MPa}$ and $830\text{MPa}$ respectively.