Steel Application - High Strength Weldment
Steel Application - High Strength Weldment
(OP)
Hello all,
I would like to asks the groups assistance on a design problem/material specification.
We are designing a railroad track hand tool where part of the tool will be fabricated from 1.25" steel plate that will be flame cut into a specific profile. Onto this piece will be welded a mild steel tube (about 1" dia) that will act as a pivot point.
Working stress is about 40ksi.
I would like to use A36 plate but modifing the tool profile to lower stress will add undesirable weight.
I would like to find a steel with an Sy in the range of 80ksi that does not need to be heat treated after welding or preheated during welding.
I have looked at HSLA A656 grade 80 but the max plate thickness it is available is 3/4"
Has anyone ever worked with HSLA-100 as used in shipbuilding?
Any other ideas?
TIA
Bill
I would like to asks the groups assistance on a design problem/material specification.
We are designing a railroad track hand tool where part of the tool will be fabricated from 1.25" steel plate that will be flame cut into a specific profile. Onto this piece will be welded a mild steel tube (about 1" dia) that will act as a pivot point.
Working stress is about 40ksi.
I would like to use A36 plate but modifing the tool profile to lower stress will add undesirable weight.
I would like to find a steel with an Sy in the range of 80ksi that does not need to be heat treated after welding or preheated during welding.
I have looked at HSLA A656 grade 80 but the max plate thickness it is available is 3/4"
Has anyone ever worked with HSLA-100 as used in shipbuilding?
Any other ideas?
TIA
Bill





RE: Steel Application - High Strength Weldment
RE: Steel Application - High Strength Weldment
17-4 PH Stainless Solution annealed has 110ksi Yield strength. I will be interested to hear comments on the viability of as-welded metallurgy and choice of filler metal.
Jesus is THE life,
Leonard
RE: Steel Application - High Strength Weldment
Leonard: I'm clueless, how does my stipulations avoid weld cracking??
Why did the catastrophic failure occur?
Bill
RE: Steel Application - High Strength Weldment
So I was incorrect in what I first said.
Jesus is THE life,
Leonard
RE: Steel Application - High Strength Weldment
Nick
I love materials science!
RE: Steel Application - High Strength Weldment
Bill
RE: Steel Application - High Strength Weldment
Bill,
An example of where you need to stress relieve: You have a welded assembly and when you machine it, some of the residual stresses from welding are relieved and the geometry distorts so that tolerances cannot be held like for a bearing fit. Another example is where the applied service stress superimposed on residual welding stress exceed the yield strength or fatigue strength.
Jesus is THE life,
Leonard
RE: Steel Application - High Strength Weldment
4130 might work for you.
Jesus is THE life,
Leonard
RE: Steel Application - High Strength Weldment