Clarification about correlation of yield strength and hardness of a 8640 steel after heat treatment
Clarification about correlation of yield strength and hardness of a 8640 steel after heat treatment
(OP)
Dear all,
First of all I will describe my current situation.
I am starting an internship on a new company, I am still on my third day, but an accident happened and as I am the only one here who has any knowledge on materials the responsible engineer came up to me and asked me the following question:
"I am doing an FEA to investigate the cause of the accident and I want to know if there is a way to find out a table or any reference correlating the hardness of a 8640 steel with the yield and ultimate tensile strength after certain heat treatment, knowing the properties before the treatment and the hardness post heat-treating? Assuming that I know the heat treatment"
I know that is too little information, but it would be of great help if anyone could give any advice.
Matheus
First of all I will describe my current situation.
I am starting an internship on a new company, I am still on my third day, but an accident happened and as I am the only one here who has any knowledge on materials the responsible engineer came up to me and asked me the following question:
"I am doing an FEA to investigate the cause of the accident and I want to know if there is a way to find out a table or any reference correlating the hardness of a 8640 steel with the yield and ultimate tensile strength after certain heat treatment, knowing the properties before the treatment and the hardness post heat-treating? Assuming that I know the heat treatment"
I know that is too little information, but it would be of great help if anyone could give any advice.
Matheus





RE: Clarification about correlation of yield strength and hardness of a 8640 steel after heat treatment
RE: Clarification about correlation of yield strength and hardness of a 8640 steel after heat treatment
RE: Clarification about correlation of yield strength and hardness of a 8640 steel after heat treatment
RE: Clarification about correlation of yield strength and hardness of a 8640 steel after heat treatment
RE: Clarification about correlation of yield strength and hardness of a 8640 steel after heat treatment
ISO 18265 shows a number of hardness conversions and their approximate tensile strength for steels. For quenched and tempered steels in the range of ~ 22 to 60 HRC, the ratio of yield strength to tensile strength is in the range of 90-98%, with 90-95% being typical up to ~ 45 HRC and 95-98% for steels > 45 HRC. You can obtain ISO 18265 directly from ISO or from a licensed vendor such as IHS:
http://www.iso.ch
http://global.ihs.com