High-Quality Stainless Steel B8 B8m Stud Bolts

High-Quality Stainless Steel B8 and B8m Stud Bolts

First introduced in 1936, the ASTM A193 standard is widely used in the oil and chemical industries. This specification covers both inch and metric series fasteners. It includes alloy steel and stainless steel bolting materials suitable for high-temperature or high-pressure applications. These bolts are commonly used in pressure vessels, valves, flanges, and fittings. While they are often available with national coarse (UNC) thread pitches, for traditional applications, threads are typically specified at 8 threads per inch (TPI) for diameters above one inch.

Common A193 Grades

B8 Class 1 - Stainless steel, AISI 304, solution annealed.

B8M Class 1 - Stainless steel, AISI 316, solution annealed.

B8 Class 2 - Stainless steel, AISI 304, solution annealed, cold worked.

B8M Class 2 - Stainless steel, AISI 316, solution annealed, cold worked.

A193 Mechanical Properties

Grade Size Tensile ksi, min Yield, ksi, min Elong, %, min RA %, 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 - 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 45 321 max 35 max

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

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 - 20.0% 16.0 - 18.0%

Nickel 8.0 - 11.0% 10.0 - 14.0%

Molybdenum Â 2.00 - 3.00%

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

Wide Range of Products We can supply all types of stainless steel hardware.

Excellent Service We provide honest and sincere service to our clients.

Superior Quality Our strict quality control ensures reliable products.

OEM Support Custom production based on your drawings or samples is available.

Fast Delivery Stock items can be delivered within 3 days; custom orders take 7-15 days.

Low MOQ Flexible order sizes to meet your business needs.

Sample Charge:

Sample Charges Sampling Time

Based on your request 5-7 days

Free for Existing Mold 3 days

Packing Information:

Carton Size: 25*16*25CM

Wooden Pallet/Case Size: 110*90*80CM

Color Printed Boxes & Cartons Available Upon Request.

Company Information:
Hand Industrial Ltd was established in 2010 as a professional manufacturer and supplier of stainless steel hardware. Our product range includes stainless steel bolts, threaded studs, machine screws, tapping screws, and self-drilling screws in various materials such as SS 304, SS 316, SS 316L, and SS 410. We produce according to DIN, ANSI, BS, ISO, JIS standards, and offer OEM services. Our products are popular in Europe, Australia, North America, the Middle East, Southeast Asia, and parts of Africa.

We can supply different sizes of super alloy steel hex bolts, hex socket bolts, threaded studs, hex nuts, and plain washers.

We also offer a wide range of stainless steel hex bolts, hex socket bolts, threaded nuts, hex nuts, and plain washers.

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