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# What is a good resource for estimating the yield and fatigue of a 316SS weld?

## What is a good resource for estimating the yield and fatigue of a 316SS weld?

(OP)
I am trying to estimate the rough yield strength and endurance limit or fatigue behavior for a 316SS fillet weld. I really just need rough (though realistic and up to date) numbers but I am having trouble finding a resource for this. I know the ASME BVPC has SN curves for 300 series welds, these are good but I am trying to find an alternate source.

Replies continue below

### RE: What is a good resource for estimating the yield and fatigue of a 316SS weld?

Don't lose track of the importance of the geometric variations and the stress concentrations inherent in any weld.

They make ciphering weld fatigue strength mighty perilous.

https://www.twi-global.com/technical-knowledge/pub...
"The most promising finding is that post-weld improvement techniques which introduce a significant fatigue crack initiation period, such as weld toe dressing, provide greater benefit for high strength than low strength steels. [28,29] However, the dependence on steel strength is still rather weak ( Fig.3), reflecting the severe stress concentration represented by the welded joint. [30]"

### RE: What is a good resource for estimating the yield and fatigue of a 316SS weld?

As TM said, the variations will be staggering because of small variations in weld geometry.
You need to use very conservative numbers if you want to avoid risk of failures.

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P.E. Metallurgy, consulting work welcomed

### RE: What is a good resource for estimating the yield and fatigue of a 316SS weld?

(OP)
Thank you, it does seem like a bit of a rabbit hole to try to nail something down for fatigue.

Is the same true for the yielding stress or is that more stable?

### RE: What is a good resource for estimating the yield and fatigue of a 316SS weld?

The yield should be pretty reliable.
The exact chemistry of the base and filler along with the welding method will establish the mechanical properties.
The residual ferrite levels will have an impact on the Yield.
Being consistent is the key.

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P.E. Metallurgy, consulting work welcomed

(OP)
Thank you Ed

### RE: What is a good resource for estimating the yield and fatigue of a 316SS weld?

Eurocodes have a very detailed catalogue of (weld) details with associated fatigue reduction factors.

### RE: What is a good resource for estimating the yield and fatigue of a 316SS weld?

The Metals Handbook Desk Edition is a comprehensive single-volume reference source on the properties, selection, processing, testing, and characterization of metals and their alloys. Although the information presented in this Volume is drawn principally from the multiple-volume ASM Handbook series,

DHURJATI SEN
Kolkata, India

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