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dodolo 發問時間: 科學工程學 · 8 年前

ASTM A838

請問各位先進 "ASTM A838" 是甚麼規範? 他主要在說明甚麼事情? 麻煩各位先進幫忙一下, 謝謝

已更新項目:

請問台灣有哪家公司用這種材料做產品加工?

2 個已更新項目:

謝謝shamejudge的協助,感謝您

有哪位先進知道哪家工廠有用這種材料做加工? 麻煩介紹一下 謝謝

2 個解答

評分
  • 8 年前
    最佳解答

    ASTM A838 - 02(2007) Standard Specification for Free-Machining Ferritic Stainless Soft Magnetic Alloy Bar for Relay Applications

    Abstract

    This specification covers nominally 17.5% Cr free-machining ferritic stainless soft magnetic alloy produced or supplied expressly in cold-finished bar form for use in magnetic cores and other parts requiring a corrosion-resistant, high permeability, low-coercivity steel. This specification does not cover either cast parts or parts produced by powder metallurgy techniques. Two specific alloy types are covered distinguished by different silicon levels. Required measurements include chemical analysis and dc magnetic property measurement. The magnetic properties depend both on the grade and the dimensions. Apart from the requirements, the specification contains useful appendices discussing the magnetic testing of these alloys and typical magnetic and physical properties.

    2012-07-30 20:35:04 補充:

    1. Scope

    1.1 This specification covers free-machining ferritic stainless soft magnetic alloy produced or supplied expressly in cold-finished bar form for use in magnetic cores and other parts requiring a high permeability, low-coercivity stainless steel.

    2012-07-30 20:36:28 補充:

    1.1.1 This specification does not cover either cast parts or parts produced by powder metallurgy techniques.

    2012-07-30 20:37:03 補充:

    1.2 Two specific alloy types are covered. The primary constituents are shown in Table 1. These types have corrosion resistance similar to AISI Type 430F and Type 430F, Specification A 582/A 582M.

    2012-07-30 20:37:15 補充:

    1.1.3 This specification covers only these alloy types supplied in cold-finished bars in cross-sectional shapes such as rounds, squares, hexagons, and octagons with diameters (diagonals) greater than or equal to 0.250 in. (6.35 mm) and less than or equal to 1.625 in. (41.28 mm).

    2012-07-30 20:38:12 補充:

    1.4 Certain cold-finished round bar products are capable of being supplied mill annealed to required magnetic properties such as low coercivity. The size range that can be mill annealed is from 0.250 to 1.625 in. (6.35 to 41.28 mm).

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  • Lv 6
    8 年前

    叫的到料都是好解決的事情......

    而且其實除非有特殊需求, 很多機械設備對料的要求沒一定要那麼特殊

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