Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: SF Bay Bridge
    From: Lu Abel
    Date: 2013 Apr 5, 20:37 -0700
    The suspicion at the moment is that the steel suffers from "hydrogen embrittlement"    I'm not a metallurgist, but I understand the even very small quantities of hydrogen as an impurity in steel can seriously degrade the tensile strength of ultra-high-strength steels.


    From: Örjan Sandström <pokerbacken---.com>
    To: luabel{at}ymail.com
    Sent: Friday, April 5, 2013 11:07 AM
    Subject: [NavList] Re: SF Bay Bridge


    no idea, not impossible, high tensile steels are, Uhm, less than ideal to work with.
    How hard? I find it hard to express exactly how difficult they can be to work without resorting to quite harsh language, let us just say they require attention and good tools/machines.
    I have worked steel that required the edge to be near perfectly sharpened, a tiny imperfection that would not have mattered machining even 316 stainless or hardened truck springs would make a MESS of this stuff (looked dull and uneven almost like packed silvery sand)
    ----------------------------------------------------------------
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com
    ----------------------------------------------------------------
    View and reply to this message: http://fer3.com/arc/m2.aspx?i=123359


       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site