ASTM A193 B7 Full Thread Stud Bolt B16.5 Flange Connection

• Customization: Available
• Material: Carbon Steel
• Type: Round Head
• Model NO.: SBN-006
• Connection: Common Bolt
• Head Style: Round
• Standard: DIN, ANSI, GB, JIS, BSW, ASME, ISO, Hg
• Grade: 8.8
• Application: Machinery, Chemical Industry, Environmental, Building, B16.5 Flanges Connection
• Finish: Black
• Surface Treatment: Black
• Delivery: 2-4 Weeks
• Thread: Full Thread, Unc, Unf
• Length: According to Client's Requirement
• Size Range: M6-M100, 1/4"- 4"
• Transport Package: Plywood Cases/Wooden Boxes
• Specification: 1/2" x 3"
• Trademark: Qishine
• Origin: China
• HS Code: 7318159090
• Package Size: 30.00cm * 30.00cm * 35.00cm
• Package Gross Weight: 115.000kg

Product Description

Company Profile

ASTM A193 B7 Full Thread Stud Bolt - B16.5 Flange Connection

 

• Complies with ASTM A193 B7 standard, made of high-strength alloy steel with excellent tensile strength and corrosion resistance
• Full Thread design, compatible with B16.5 flange connection for stable and non-loose installation
• Industrial heavy-duty quality with precision threaded processing, suitable for high-frequency scenarios like piping, machinery, and chemical engineering
• Customizable in various specifications and sizes, supporting bulk purchases with factory-direct cost-effectiveness

 

Product Introduction

Our ASTM A193 B7 Bolt (Full Thread Stud Bolt) is a high-performance fastener specifically designed for B16.5 Flange Connection. Crafted from premium alloy steel, this High Strength Alloy Bolt meets rigorous industrial standards, delivering reliable performance in heavy duty working environments.

 

The Precision Threaded Bolt structure ensures a tight fit and easy installation, while the full-thread design enhances load-bearing capacity and stability. As a professional Industrial Flange Bolt, it is widely applied in petroleum, chemical, power, machinery, and other fields, perfectly matching the needs of flange connection projects.

 

Every B7 Full Thread Bolt undergoes strict quality inspection-from material selection to production processing-to guarantee consistent dimensional accuracy and mechanical properties. Whether for standard specifications or customized requirements, we provide cost-effective solutions for global buyers.

 

 

Certifications

 

As we know that Stud Bolts have many categories, the type for flange connection is called flange stud bolts, which has fully thread with chambered ends. The theoretical length is measured the thread. Continuous threaded stud bolt is very similar to it, except no chambered ends.
 

 

 

 

Stud Bolt Materials

The most common materials for stud bolts (for flanges) are ASTM A193 (grade B7, B8, B8M, B8T), ASTM A453 (grade 660), ASTM A320 (grade L7, L7M), and ASTM A182 (duplex and super duplex bolting). For aggressive fluids and environments, stud bolts can be coated with Xylan/PTFE, Zinc and other materials.

ASTM A193 Stud Bolts: Chemical Composition

Physical Element	ASTM A193 grade B7 (AISI 4140)	ASTM A193 grade B8 (AISI 304)	ASTM A193 grade B8M (AISI 316)
Carbon	0.38 - 0.48%	0.08% max	0.08% max
Manganese	0.75 - 1.00%	2.00% max	2.00% max
Phosphorus, max	0.035%	0.045%	0.045%
Sulfur, max	0.040%	0.030%	0.030%
Silicon	0.15 - 0.35%	1.00% max	1.00% max
Chromium	0.80 - 1.10%	18.0 - 20.0%	16.0 - 18.0%
Nickel	absent	8.0 - 11.0%	10.0 - 14.0%
Molybdenum	0.15 - 0.25%	absent	2.00 - 3.00%

ASTM A193 Stud Bolts: Mechanical Properties

ASTM A193	Size	Min Tensile Strength (KSI)	Min Yield Strength (KSI)	Min Elongation (%)	RA % min	Max HBW	Max HRC
ASTM A193 grade B7	Up to 2-1/2	125	105	16	50	321	35
	2-5/8 - 4	115	95	16	50
	4-1/8 - 7	100	75	18	50
ASTM A193 grade B8 Class 1	All	75	30	30	50	223	35
ASTM A193 grade B8M Class 1	All	75	30	30	50	223	96
ASTM A193 grade B8 Class 2	Up to 3/4	125	100	12	35	321	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
ASTM A193 grade B8M Class 2	Up to 3/4	110	95	15	45	321	35
	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

 

The material chosen for the threaded stud and the hex nuts should be compatible. Materials for bolting sets shall be selected based on the process's working temperatures, as shown in the table below:

	TEMPERATURE °C ( °F )
STUD BOLTS MATERIALS	MIN.	MAX.
CARBON STEEL	-29 (-20)	300 (572)
A193 B7, L7	-73 (-100)	400 (752)
A193 B6	0 (32)	500 (932)
A193 B8	-200 (-325)	575 (1067)
A193 B16	0 (32)	520 (968)
A193 B17B	-29 (-20)	650 (1202)
A913 Inconel 718	0 (32)	750 (1382)
A453 Gr. 660	-29 (20)	538 (1000)

 

Application Scenarios (Long-Tail Keyword Expansion Area)

This B16.5 Flange Bolt is an ideal choice for various industrial scenarios:

 

• Piping Systems: Fixing flange interfaces, suitable for petroleum, natural gas, water supply and drainage pipelines
• Mechanical Equipment: Component connection for heavy machinery and general machinery to ensure stable operation
• Chemical Industry: Corrosion-resistant demand scenarios, adapting to equipment installation in acid-base environments
• Power Engineering: Flange connection for power plants and substations to ensure safety in high-voltage environments
• Construction Engineering: Flange fixation for large building steel structures to enhance structural stability

Product Advantages (Trust-Building Area)

1. Standard Compliance: Strictly adheres to ASTM A193 B7 and B16.5 standards with traceable quality
2. High-Quality Material: Alloy steel construction offers high temperature resistance, wear resistance, tensile strength, and long service life
3. Exquisite Craftsmanship: Precision thread processing with small tolerances, high installation fit, and no slipping risk
4. Bulk Supply: Factory-direct supply with sufficient inventory, supporting bulk purchases and short delivery cycles
5. Service Guarantee: Provides quality inspection reports and after-sales technical support to solve procurement worries

 

 Stud Bolts' Coating

Stud bolts can be coated to increase the resistance to corrosion. The most common types of coatings for stud bolts are listed below:

• Electro zinc plating
• Electro cadmium plating
• Hot dip galvanizing
• PTFE Coating
• Phosphate coating
• Electroless nickel plating
• Zinc-nickel coating
• Aluminum coating
• Silver coating
• Zinc/Nickel by electrodeposition
• Xylan coating