ASTM A193 B7 Heavy Hex Bolts

ASTM A193 B7 Heavy Hex Bolts

Short Description:

A193 B7 Heavy Hex Bolts Heavy Hex Cap Screws Standard: ASME/ANSI B18.2.1, ASME/ANSI B18.2.3.7M (Various types of head are available) Inch Size: 1/2”-2.3/4” with various lengths Metric Size: 1/2-M72 with various lengths Grade: ASTM A193 B7 Finish: Black Oxide, Zinc Plated, Zinc Nickel Plated, PTFE etc. 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 Pleas...


  • FOB Price: US $0.5 - 9,999 / Piece
  • Min.Order Quantity: 100 Piece/Pieces
  • Supply Ability: 10000 Piece/Pieces per Month
  • Port: Ningbo
  • Payment Terms: L/C,D/A,D/P,T/T
  • Product Detail

    Product Tags

    Product Description

    A193 B7 Heavy Hex Bolts Heavy Hex Cap Screws

    Standard: ASME/ANSI B18.2.1, ASME/ANSI B18.2.3.7M

    (Various types of head are available)

    Inch Size: 1/2”-2.3/4” with various lengths

    Metric Size: 1/2-M72 with various lengths

    Grade: ASTM A193 B7

    Finish: Black Oxide, Zinc Plated, Zinc Nickel Plated, PTFE etc.

    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.

    Product Standards

    ASTM A193

    Scope

    Originally approved in 1936, this specification is heavily utilized in petroleum and chemical construction applications.  The ASTM standard covers alloy steel and stainless steel bolting materials for high temperature service. This specification includes fasteners intended for use in pressure vessels, valves, flanges, and fittings. Although, this material is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.

    Below is a basic summary of a few of the common grades. ASTM A193 covers a number of other standard specifications not covered in this description including B5, B6, and B16.

    Grades

    B7 Alloy steel, AISI 4140/4142 quenched and tempered
    B8 Class 1 Stainless steel, AISI 304, carbide solution treated.
    B8M Class 1 Stainless steel, AISI 316, carbide solution treated.
    B8 Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened
    B8M Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened

    Mechanical Properties

    Grade Size Tensile ksi, min Yield, ksi, min Elong, %, min RA % min
    B7 Up to 2-1/2 125 105 16 50
    2-5/8 - 4 115 95 16 50
    4-1/8 - 7 100 75 18 50
    B8 Class 1 All 75 30 30 50
    B8M Class 1 All 75 30 30 50
    B8 Class 2 Up to 3/4 125 100 12 35
    7/8 - 1 115 80 15 35
    1-1/8 - 1-1/4 105 65 20 35
    1-3/8 - 1-1/2 100 50 28 45
    B8M Class 2 Up to 3/4 110 95 15 45
    7/8 - 1 100 80 20 45
    1-1/8 - 1-1/4 95 65 25 45
    1-3/8 - 1-1/2 90 50 30 45

    Recommended Nuts and Washers

    Bolt Grade Nuts Washers
    B7 A194 Grade 2H F436
    B8 Class 1 A194 Grade 8 SS304
    B8M Class 1 A194 Grade 8M SS316
    B8 Class 2 A194 Grade 8 SS304
    B8M Class 2 A194 Grade 8M SS316

    Strain hardened nuts available as a supplementary requirement

    Product Certificates

    1
    2
    3
    4
    A325M Test Report
    A563M 10S Test Report

    About us

    Testing Lab

    1. Strength Testing Facility
    2. Impact Testing Facility
    3. Hardness Testing Facility
    5. Metallographic Analysis Facility

    Workshop

    1 Annealing Furnace
    2 Cold Forging Line
    3 Hot Forging Line
    4 Heat Treatment line
    5 Heat Treatment Line
    6 Thread Rolling  Line
    7 Thread Rolling  Line
    8 Thread Rolling  Line
    9 CNC Lathe Workshop
    10 CNC Machining Center

    Warehouse

    3 Carton and Pallet
    5 Threaded Rod Packing
    2 Metal Keg and Pallet
    6 Threaded Rod Packing
    4 Threaded Rod Packing
    1 Stock Shelf

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