STEEL STRUCTURE HEAVY HEX BOLTS HEAVY HEX NUTS A325M+A563M+F436M+F959M

M22X100 DACROMET

ASTM Standards

A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

A563M Specification for Carbon and Alloy Steel Nuts (Metric)

A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel

D3951 Practice for Commercial Packaging

F436M Specification for Hardened Steel Washers (Metric)

F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets (Metric)

F788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series

F959M Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners (Metric)

F1136M Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners (Metric)

F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection

F1789 Terminology for F16 Mechanical Fasteners

G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels

ASME Standards

B 1.13M Metric Screw Threads

B 18.18.3M Inspection and Quality Assurance for Special Purpose Fasteners

B 18.2.3.7M Metric Heavy Hex Structural Bolts

B 18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products

This specification covers two types of quenched and tempered, steel, metric heavy hex structural bolts having a minimum tensile strength of 830 MPa (Note 1).

Formerly under the jurisdiction of Committee F16 on Fasteners, this specification was withdrawn in May 2016 and replaced by Specification F3125/F3125M for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi (830 MPa) and 150 ksi (1040 MPa) Minimum Tensile Strength, Inch and Metric Dimensions. Specification F3125/F3125M supersedes and replaces specifications; A325, A325M, A490, A490M, F1852 and F2280. The unified Specification F3125/F3125M corrects known inconsistencies in the original documents and the combination will assure that requirements of the products covered under the original standards stay aligned.

A563M Specification

ASTM A563M Heavy Hex Nuts (Metric) for use with ASTM A325M Bolts

This ASTM A563 and ASTM A563M heavy hex nuts specification covers chemical and mechanical requirements for eight property classes of hex and hex-flange carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts.

Note 1: Throughout this specification, the term class means property class.

Note 2: Requirements for the four classes 5, 9, 10, and 12 are essentially identical with requirements given for these classes in ISO 898/II. Requirements for Classes 8S and 10S are essentially identical with requirements in an ISO 4775 Hexagon Nuts for High-Strength Structural Bolting with Large Width Across Flats, Product Grade B, Property Classes 8 and 10. Classes 8S3 and 10S3 are not recognized in ISO standards.

1.2 Classes 8S3 and 10S3 nuts have atmospheric corrosion resistance and weathering characteristics comparable to those of the steels covered in Specification A 588/A 588M. The atmospheric corrosion resistance of these steel’s substantially is better than that of carbon steel with or without copper addition. and when properly exposed to the atmosphere, these steels can be used bare (un-coated) for many applications.

1.3 The nut size range for which each class is applicable is given in the table on mechanical requirements.

Notes:

1. The nuts will generally conform to ANSI B18.2.4.1M – Metric Heavy Hexagonal Nuts

2. Thread will conform to class 6H of ANSI B1.13M for Coarse Series

3. Material & Heat Treatment: To achieve mechanical properties of Properties Class 8S or 10S of ASTM A563M.

4. Nuts of Property Class 8S are used with bolts of ASTM A325M – Type 1 (uncoated). Nuts of Property Class 10S are used with bolts of ASTM A325M – Type 1(Zinc– coated) (in general nuts of a higher property class can replace nuts of a lower property class in a joint).

5. In Bolt/Nut assembly, tightening should be done by rotation of nut.

6. Sizes in brackets are non preferred standards.

7. All dimensions are in millimeters.

A563M Nut Dimension Classes 8S & 10S

Process flow

Cold forging

Annealing treatment(if need) ➨ wiredrawing ➨ clod forging ➨ thread rolling ➨make heat treatment ➨ Finish ➨ Packing

Hot forging

Cutting material ➨ hot forging ➨ turning ➨ shrink diameter(half thread) ➨thread rolling ➨ make heat treatment ➨ Finish ➨ Packing

Product Grade

Grade 8S Grade 10s

Materials and Chemical compstition

1035

1045

40CR

Finish

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

The advantages of QBH

• QBH brand sales to the main quality assurance.
• Years of export trade management, excellent service, word-of-mouth guarantee.
• By working with TUV,escort for quality.
• Customization of non-standard parts can be made according to customer's requirements and drawings.
• For quality customers,we can provide a certain credit period.
  

General:

In brief Type 3 grade A325 bolts shall be marked “A325” to distinguish them from standard grade A325s. Likewise Grade A490 bolts are available in diameters from 1/2 to 1-1/2 inch diameters with a minimum tensile strength of 150,000 PSI for all diameters, and are offered in two types.

In Fact ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength. It defines mechanical properties for bolts that range from 1⁄2 to 1 1⁄2 inches (13 to 38 mm) in diameter.

In accordance with ASTM A325, all threaded components of the fastener assembly must be galvanized by the same process and the supplier’s option is limited to one process per item with no mixed processes in a lot.

This Specification deals principally with two strength grades of high-strength bolts, ASTM A325 and A490, and with their design, installation and inspection in structural steel joints. Equivalent fasteners, however, such as ASTM F1852 (equivalent to ASTM A325) twist-off-type tension-control bolt assemblies, are also covered. These provisions may not be relied upon for high-strength fasteners of other chemical composition, mechanical properties, or size. These provisions do not apply when material other than steel is included in the grip; nor are they applicable to anchor rods. This Specification relates only to the performance of fasteners in structural steel joints and those few aspects of the connected material that affect this performance. Many other aspects of connection design and fabrication are of equal importance and must not be overlooked. For more general information on design and issues relating to high-strength bolting and the connected material, refer to current steel design textbooks and the Guide to Design Criteria for Bolted and Riveted Joints, 2 nd Edition (Kulak et al., 1987).

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