Low price for ASTM F436 F436M Hardened Steel Washers for Iraq Manufacturers

ASTM F436 F436M Hardened Steel Washers Hardened Circular, Clipped Circular, and Extra-Thick Washers, Beveled Washers Metric Size: M12-M100  Inch Size: 1/4”-4” Material Grade: Through hardened washers shall have a hardness of 38 to 45 HRC, except when zinc-coated by the hot-dip process, in which case they shall have a hardness of 26 to 45 HRC. Metric washers are suitable for use with fasteners covered in Specifications A 325M, A 490M, A 563M and with fasteners of Specification F 568 property classes 8.8 and higher. Inch washers are suitable for use with fasteners covered in Specifications A325, A 354, A 449, and A 490. Finish: Black Oxide, Zinc Plated, Hot Dip Galvanized, Dacromet, and so on Packing: Bulk about 25 kgs each carton, 36 cartons each pallet Advantage: High Quality and Strict Quality Control, Competitive price, Timely delivery; Technical support, Supply Test Reports Please feel free to contact us for more details.

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    Specifications grading is a system of student assessment described by Linda Nilson in her newest book, “Specifications Grading: Restoring Rigor, Motivating Students, and Saving Faculty Time”. In specs grading, assessments are aligned with learning outcomes and implemented using bundles of assignments that are graded pass/fail, and students choose the grade they wish to attain and select the bundles accordingly. For more background, see the links at the end of this post. 

    In this hangout, +Theron Hitchman of the University of Northern Iowa and I will be talking specs grading and its potential use in university mathematics courses. TJ and I just finished reading the book and so we are not experts in this — the discussion is for hammering out thoughts and airing out ideas. Hope to see you there. 

    In case it’s not clear, the hangout is on Thursday, December 4 at 3pm Eastern. 

    More background: 
    + Article on specs grading: https://www.utimes.pitt.edu/?p=30598
    + Interview with Linda Nilson: https://chronicle.com/blognetwork/castingoutnines/2014/11/25/41-interview-linda-nilson/
    + Link to her book: https://amzn.com/1620362422



    Darlene Armstrong, director and co-owner of the Denver School of Metal Arts, shows you how to anneal a sheet of copper using an acetylene torch.

    Annealing is a technique that all metalsmiths will utilize at some point in their work. Darlene Armstrong will show you how simple this technique is to learn and tell you what signs to look for to ensure you’ve annealed your metal properly. If you want to stamp, texture, forge or form metal, you need to know how to anneal it!

    If you would like to learn more about the Denver School of Metal Arts, call our office at (303)997-9846 or check out our website www.metalartschool.com.