N.T. Switzner

5 Questions 9 Answers 0 Followers

Questions related from N.T. Switzner

What is the origin of PREN (pitting resistance equivalent number)?

Dear metals/corrosion community, What is the origin of PREN (pitting resistance equivalent number)? Since PREN is an empirical relationship, who did the original research? Have all of the data,...

16 September 2020 2,969 7 View

How does manganese influence the work hardening rate of low-carbon (ferrite/pearlite) steel?

Hi All, In the context of tensile testing of low-carbon (ferrite/pearlite) steel, are there any studies about the effects of composition (specifically manganese content) on the work hardening rate...

16 September 2020 3,340 3 View

For steel, are the qualitative measures of machinability and toughness, directly opposed to one another?

When I think of a machinable steel, I think of a steel that lends itself to small chips (easy chip breaking) during a machining process such as lathe turning. On the other hand, 304 stainless...

16 August 2020 4,029 10 View

What are the effects of trace or residual phosphorus on low carbon, Si/Mn, ferrite/pearlite, Q&T and HSLA steel?

Hi All, Please expound on why low phosphorus is a desirable characteristic for steels? - Which industries represent the greatest demand for low phosphorus steels and why? - Add links to helpful...

24 October 2019 9,340 2 View

Is cobalt a residual element in recycled steel?

I'm interested in low carbon steel for oil and gas line-pipe. Some steel made after 1950 has higher cobalt content (0.015-0.040%) than pre-1945 steel (

12 September 2019 3,164 2 View