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Lightweight M6 - M100 Duplex Stainless Steel Bolts Nut Washer Stud Non - Magnetic

Categories Duplex Stainless Steel Fasteners
Brand Name: HT
Model Number: 304 316 321 317L 410 stainless steel bolt nut washer stud
Certification: ISO9001
Place of Origin: China
MOQ: 1 set
Price: Negotiation
Payment Terms: L/C,T/T, Western Union
Supply Ability: 1000 set per month
Delivery Time: 30-35 work days
Packaging Details: wooden case, wooden pallet
Product Type: Bolt, Nut, Washer, Stud bolt, U bolt
Name: 304 316 321 317L 410 stainless steel bolt nut washer stud
Size: M6-M100
Finish: Cold galvanizing, Zinc-Nickel, Black, Cadium plated
Producing standard: DIN, ASME
Material: Nickel alloy/stainless steel/duplex stainless
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    Lightweight M6 - M100 Duplex Stainless Steel Bolts Nut Washer Stud Non - Magnetic

    304 316 321 317L 410 stainless steel bolt nut washer stud


    1. What are the differences between 18-8, type 304, and type 316 stainless steels?

    Stainless Steel” is the general name for a large family of alloy steels that contain at least 10.5% chromium as part of their composition. At and above this level of chromium, a complex chrome-oxide surface layer forms that prevents further oxygen atoms from penetrating into the steel and thus protects the iron in the matrix from rusting. This layer is what makes the steel “stainless.” Higher levels of chromium and the addition of other alloying elements such as molybdenum and nickel enhance this protective barrier and further improve the corrosion resistance of the stainless steel. There are many different types of stainless, but by far the most popular and widely used are the 300 series stainless steels, also known as the austenitic stainless steels.


    The 300 series designation contains many different compositions of alloy steel (303, 304, 305, 316, 321, 347, etc.) but the common factors among them are:

    • Their carbon content is generally held to a maximum of 0.08%
    • They (generally) have 18% chromium
    • They (generally) have 8% nickel
    • They are non-magnetic
    • They cannot be hardened by heat treatment
    • They can be hardened by cold working the material (“work hardening.”)

    The term “18-8” is often used to designate products made from 300 series stainless. This “18-8” call out is referring to the 18% chromium/8% nickel alloy mixture of the steel. “18-8” is not an actual specification, as it only refers to two different alloys in the steel. While all 300 series stainless steels share this 18/8 mix, slight differences in chemical composition between the different grades of the 300 series do make certain grades more resistant than others against particular types of corrosion. In the fastener industry the term “18-8” is often used as a designation for a bolt, nut, or washer manufactured from 300 series stainless steel material that has the 18% chromium/8% nickel alloy mixture. However, a fastener manufactured from stainless material that meets the 18/8 alloy mix does not necessarily meet the other slight differences in chemistry required to certify it as Type 304 stainless. Type 304 is by far the most popular of the 300 series stainless steels.


    2. 304 316 321 317L 410 stainless steel bolt dimension

    TypeStud BoltThreaded RodHex Socket Cap Screw
    Hex NutU-BoltSpring Washer
    Pain WasherHex Bolt (full thread, partial thread)
    SizeStud BoltDIN: M6~M100ASME: 1/4"~5"
    Hex BoltDIN: M6~M64ASME: 1/2"~2 1/2"
    FinishCold galvanizing, Hot-dip Galvanizing, PTFE, Zinc Nickel, Black coating, Plain
    Producing StandardASMEASME B18.2.1Hex Bolts
    ASME B18.2.2Hex Nuts
    ASME B18.22.1Plain Washers
    DINDIN931Hex Bolt with partial thread
    DIN 933Hex Bolt with full thread
    DIN 912Hex Socket Cap Screw
    DIN 934Hex Nut
    DIN 125Plain Washer
    DIN127Spring Washer
    DIN 975Threaded Rods
    DIN 976Stud Bolts
    DN 3570U-Bolt
    Material GradeStainless Steel304/304L, 316/316L, 316Ti, 317/317L, 321, 347/347H, 310, 309, A453 660C,660D, S31254 /254SMO, 904L /1.4539 /N08904, N08367, N08926 / 1.4529
    Duplex Steel2205 /S31803, S32750/2507, S32760
    Nickel Alloy SteelUNS N02200/Ni 200, UNS N02201 /Ni201,
    UNS N04400/ Monel 400, UNS N05500/ Monel K500 ,
    UNS N06600/ Inconel 600, UNS N06601/ Inconel 601,
    UNS N06625/ Inconel 625, UNS N08825/ Incoloy 825,
    UNS N08800 /Incoloy 800, UNS N08810 /Incoloy 800H ,
    UNS N08811 /Incoloy 800HT, UNS N08020 /Alloy 20,
    UNS N06002 /Hastelloy X, UNS N06022/ Hastelloy C22, UNS N06200/C2000, UNS N10276/ Hastelloy C276,
    UNS N10665 /Hastelloy B2, UNS N10675/Hastelloy B3,
    UNS N08020/ Alloy 20, UNS N08031/ Alloy 31
    Carbon SteelGrade 4.8, 5.8, 6.8, 8.8, 10.8, 12.9
    Alloy SteelA193 B7, A194 2H, A320 L7, L7M

    3. Stainless steel hex cap screw markings

    Inch

    • 18-8 , which can be 302, 303 or 304 stainless, refers to 18% chromium and 8% nickel content.
    • 316 is more corrosion resistant than 18-8 because it contains molybdenum, but in inch fasteners both have the same tensile strength.

    Metric

    • A2 refers to metric 18-8.
    • A4 refers to metric 316.
    • Class 50, 70 and 80 designate increasingly higher metric strength levels.
    • A manufacturer’s mark is required on metric M5 or larger diameters.

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