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specification was withdrawn in May 2016 and replaced by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
Nominal
size and
thread pitch
d | S | E | M | dw | C | Total
runout of
bearing
surface |
| Width across flats | Width across corners | Thickness | Bearing face diameter | Washer face thickness |
| max | min | max | min | max | min | min | max | min | max |
| M16 x 2 | 27 | 26.16 | 31.18 | 29.56 | 17.1 | 16.4 | 24.9 | 0.8 | 0.4 | 0.47 |
| M20 x 2.5 | 34 | 33 | 39.26 | 37.29 | 20.7 | 19.4 | 31.4 | 0.8 | 0.4 | 0.58 |
| M22 x 2.5 | 36 | 35 | 41.57 | 39.55 | 23.6 | 22.3 | 33.3 | 0.8 | 0.4 | 0.63 |
| M24 x 3 | 41 | 40 | 47.34 | 45.2 | 24.2 | 22.9 | 38 | 0.8 | 0.4 | 0.72 |
| M27 x 3 | 46 | 45 | 53.12 | 50.85 | 27.6 | 26.3 | 42.8 | 0.8 | 0.4 | 0.8 |
| M30 x 3.5 | 50 | 49 | 57.74 | 55.37 | 30.7 | 29.1 | 46.6 | 0.8 | 0.4 | 0.87 |
| M36 x 4 | 60 | 58.8 | 69.28 | 66.44 | 36.6 | 35 | 55.9 | 0.8 | 0.4 | 1.05 |
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
| CHEMICAL COMPOSI % |
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.34 | 0.13 | 0.73 | 0.012 | 0.002 | 0.02 | 0.01 | 0.02 |
1045
| CHEMICAL COMPOSI % |
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.45 | 0.23 | 0.58 | 0.014 | 0.006 | 0.057 | 0.008 | 0.016 |
40CR
| CHEMICAL COMPOSI % |
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.4 | 0.21 | 0.54 | 0.015 | 0.008 | 0.95 | 0.02 | 0.02 |
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).
FAQ
1. How do you let me trust you.
Jiaxing City Qunbang Hardware Co.,ltd hs its own right of import
and export,QBH trademark in China,United States,European Union have
been registered.At the same time,you can also check the
registration information of our company in the China industry and
Commerce system.
2. How about your price.
We will be based on different markets,for different quality and
quantity,tailor-made prices for customers,in order to achieve
win-win goal.
3. How do you control your quality.
Incoming quality contral( IQC)→Process Quality control(PQC)→Output
quality control(OQC),and the random samples is sent to TUV for
testing.If the customer received the goods and found quality
problems,QBH company promises to be responsible for returning money
or replenishing the goods
4. Could you provide free samples?
For new customer, We can provide free samples for standard
fastener, But the clients will pay the express
charges. For old customer, We will send you free samples and pay
express charges by ourself.
5. Do you accept small order?
QBH company can accept small orders if we have them in
stock.Generally speaking,the stock probability of stainless steel
fasteners is higher than that of carbon steel fasteners.
6. How about your delivery time
What we pursure is the high efficiency movement pattern,the
stainless steel fastener delivery time about 15days,the carbon
steel fastener will it about 30days
7. What is your packing.
Usually 25KG/carbon,36CTNS on the pallets,or 20-30kg/Bags,then on
the pallet,QBH company personalized packagingis also available,like
10PCS/plastic bag or 10pcs/box,it can print some information
such as LOGO and pattern of customers.
8. What is your payment term
Normally,our terms of payment are TT and L/C,if we cooperate for a
long time,we can reach the point of mutual trust,and fully support
our customers to become bigger and stronger in the local market.
Not only in the price concessions,but also in the payment can also
be made on credit,Specific credit sales time needs to be negotiated
separately
