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High-Quality Stainless Steel B8 B8m Stud Bolts
Originally approved in 1936, this specification is heavily utilized in petroleum and chemical construction applications. A193/A193M(A194/A194M) covers both inch and metric series products. 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 8Â 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.
A193 Grades
B8
Class 1Â Stainless steel, AISI 304, carbide solution treated.
B8M
Class 1Â Stainless steel, AISI 316, carbide solution treated.
B8
Class 2Â Stainless steel, AISI 304, carbide solution treated, strain hardened
B8M
Class 2Â Stainless steel, AISI 316, carbide solution treated, strain hardened
A193 Mechanical Properties
Grade
Size
Tensile ksi, min
Yield, ksi, min
Elong, %, min
RA %Â min
HBW
HRC
B8 Class 1
All
75
30
30
50
223 max
35 max
B8M Class 1
All
75
30
30
50
223 max
96 max
B8 Class 2
Up to 3/4
125
100
12
35
321 max
35 max
7/8 -Â 1
115
80
15
35
1-1/8 -Â 1-1/4
105
65
20
35
1-3/8 -Â 1-1/2
100
50
28
45
B8M Class 2
Up to 3/4
110
95
15
45
321 max
35 max
7/8 -Â 1
100
80
20
45
1-1/8 -Â 1-1/4
95
65
25
45
1-3/8 -Â 1-1/2
90
50
30
45
A193 Chemical Properties
Element
B8 (AISI 304)
B8M (AISI 316)
Carbon
0.08% max
0.08% max
Manganese
2.00% max
2.00% max
Phosphorus, max
0.045%
0.045%
Sulfur, max
0.030%
0.030%
Silicon
1.00% max
1.00% max
Chromium
18.0 -Â 20.0%
16.0 -Â 18.0%
Nickel
8.0 -Â 11.0%
10.0 -Â 14.0%
Molybdenum
Â
2.00 -Â 3.00%
A193 Recommended Hardware
Bolt Grade
Nuts
Washers
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
Advantages
Many products
Any type of stainless steel hardware can be supplied.
Good Service
We treat clients in great honest and sincere management is our top mission.
Good Quality
We have strict quality control system .Good reputation in the market.
OEM Accepted
We can produce as per your drawings or samples.
Shortest Delivery
We have large stock, 3Â days for stock items,7-15days for production.Â
Low MOQ
It can meet your business very well.
Sample Charge:
Samples charge
Sampling time
According to your request
5-7days
Free for Existing Mold
3days
Packing Information:
Carton Size: 25*16*25CM Wooden Pallet/Case Size: 110*90*80CM Color Printed Box&Cartons can be made per customers' desire. 
Company Information:
Hand Industrial  Ltd is established in 2010, and one professional manufacturer and supplier of stainless steel hardware. Our products contains stainless steel bolts and thread studs, stainless steel machine screws,stainless steel tapping screws and self drilling screws in different material from SS 304,SS 316,SS 316L,SS 410,etc. We often make DIN. ANSI. BS. ISO. JIS standard and OEM service is available. Our products are very popular in European, Australia, North America, Mid,east, and South East Asia and some African countries.
We can supply different sizes of super alloy steel hex bolts\hex socket bolts\threaded studs\hex nuts\plain washers.
We can supply different sizes of SS hex bolts\hex socket bolts\threaded nuts\hex nuts\plain washers.
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Because they come in a wide variety of styles and types, choosing the right one for the job can be confusing.
We've outlined some of the basics below. If you have any questions, contact one of our product specialists for more information.
High-Quality Stainless Steel B8 B8m Stud Bolts