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Stud bolts ASTM A193 B7—ASTM A194 2H

Stud bolts ASTM A193 B7—ASTM A194 2H
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Description

Standard: ASTM A193 B7—ASTM A194 2H
                   ASTM A193 B7M—ASTM A194 2HM
                   ASTM A320 L7—ASTM A194 GR.7
                   ASTM A320 L7M—ASTM A194 GR7M

MATERIAL: 1040，1045，4140，4142
Surface protection: Plain, Hot dip galvanized, Galvanization, Dacroment, Xylan .
Packing: Standard packing or According to customers' requirements
According to customers' Drawings and/or samples

 

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 or high pressure 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

 

Company profile
 
Ningbo Taida Hezhong Fastener Manufacturing Co., Ltd. is located at No. 286 Galaxy Road, Chengdong Industrial Park, Economic Development Zone, Xiangshan, Ningbo China. The company was founded in 2003 and covers an area of 13999 square meters, including a building area of 11899 square meters. The company has developed to a high professional level in the industry, specializing in the production of high-strength bolts, nuts, bolts, and non-standard special fasteners that are resistant to high pressure, high and low temperature, and corrosion, as well as high-strength bolts, nuts, bolts, and non-standard fasteners with independent research and development patents that never loosen. In recent years, the company has been committed to developing coating technology for various harsh environments and media, producing coating products to meet the anti-corrosion and acid-base requirements of bolt fasteners, making them widely used in petroleum drilling and production equipment, petrochemical equipment, pumps, valves, and seals, petrochemical pipeline containers, and marine engineering. Fasteners for equipment in highly corrosive and harsh environments such as platforms, oil well production, seawater/water injection and sewage pipelines, hydrogen energy electrolyte tanks, offshore wind power, land-based steel tower wind power, and mixed tower wind power.
Production levels include: 6.8, 8.8, 10.9, 12.9, 10.9HV, 10.9HR, 8.8HR, B7, B7M, B16, L7, L7M, L4 3, B 8, B8 M, 660A \ B \ C \ D, N4400, 410, 420, 600, 625, 655, 665, 718, 2205, 2507, F51, F53, C276, 17-4, 825, 925, N08020
Production range: Diameter M12~M100 (1/2 "~4"); Bolt length 25-200mm; The length of the tooth strip is 55-8800mm.
modular-1

01

High Quality

The company has advanced production and inspection equipment, participates in the formulation of several international standards, and has abundant technical strength. It has won 5 national invention patents and 15 national utility model patents.

02

Advanced Equipment

The company has the most advanced automated stereoscopic warehouse storage system and 20tons - level AGV intelligent handling robots for fastener industry in Ningbo area.

03

Professional Team

The company has its own R & D team and several senior technical and quality management personnel.

04

Custom Service

Our company has complete production & testing equipment. Can develop and produce products according to the drawings or samples provided by customers

 

The Fatest Industrial equipments To Achieve Technology Consulti

The main equipment includes: 4 heat treatment Lines such as 80 meter long multi roll furnace, No. 6 mesh belt furnace, induction furnace and other heat treatment equipments; a robot - automatic hot forging bolt production machine; 21 full - automatic thread rolling machines; 3 multi - station cold forging machines; 9 chamfering - stamping machines; 1 dedicated production line for windpower anchor bolts; 3 turning - milling compound machines; 1 model - 100 peeling machine; 1 model - 40 peeling machine; 1 model - 100 straightening and calendering machine. The inspection equipment includes: 200 tons and 100 tons tensile strength testing machines; a fully automatic impact testing machines; an ultrasonic flaw detector; a magnetic particle flaw detectors; an eddy current flaw detector; 3 hardness test machines; a torque testing machine; a transverse vibration testing machine; a German Spectro desktop spectrometer; an American Niton handheld spectrometer; a projector; a metallographic analysis microscope, and other advanced laboratory equipment and dedicated vacuum-tight chamber .

We can provide a variety of fasteners, in line with national standards, the Ministry of Chemical Industry standards, the United States ASTM standards

Complete certificate: API-20E, API-20F, NORSOK M650/ISO17782，TUV Nande CE certification, TUV Nande AD2000 certification,ISO9001, ISO14001, ISO45001, to meet the needs of customers in many fields.

Diameter M12~M100 (1/2 "~4"); Bolt length 25-200mm; The length of the tooth strip is 55-8800mm.

During the development process, the company has always focused on the construction and improvement of the quality management system.

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200 ton and 100 ton tensile strength testing

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fully automatic impact testing machines

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hardness machines

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Magnetic particle testing machine permeation chamber

 

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