Manufacturer Exporters Stainless Steel ASTM A193 B8 B8m Stud Bolts

Manufacturer Exporters Stainless Steel ASTM A193 B8 B8m Stud Bolts

First introduced in 1936, the ASTM A193 specification is widely used in petroleum and chemical construction industries. It covers both inch and metric series fasteners, providing high-strength materials for high-temperature or high-pressure environments. This standard applies to bolts, nuts, and other components used in pressure vessels, valves, flanges, and fittings. While national coarse (UNC) thread pitches are common, for diameters above one inch, threads are typically specified at 8 threads per inch (TPI).

Common A193 Grades

B8 Class 1 - Austenitic stainless steel, AISI 304, solution annealed.

B8M Class 1 - Austenitic stainless steel, AISI 316, solution annealed.

B8 Class 2 - Austenitic stainless steel, AISI 304, solution annealed and strain hardened.

B8M Class 2 - Austenitic stainless steel, AISI 316, solution annealed and strain hardened.

Mechanical Properties of A193

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

Chemical Composition of A193

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 for A193

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

Key Advantages

Wide Product Range We can supply all types of stainless steel hardware as required.

Excellent Service We prioritize honesty and sincerity in our customer service and management.

High Quality Our strict quality control ensures reliable performance and a strong market reputation.

OEM Available Custom production based on your drawings or samples is possible.

Fast Delivery We maintain large stock for quick deliveryâ€”3 days for stock items, 7â€“15 days for custom orders.

Low MOQ We offer flexible order quantities to meet your business needs effectively.

Sample Charges:

Sample Charge Sampling Time

As per your request 5â€“7 days

Free for Existing Mold 3 days

Packing Details:

Carton Size: 25*16*25CM

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

Color Printed Boxes & Cartons can be customized according to your preferences.

Company Information:
Hand Industrial Ltd was established in 2010 and has since become 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 to DIN, ANSI, BS, ISO, JIS standards and offer OEM services. Our products are highly popular in Europe, Australia, North America, the Middle East, Southeast Asia, and some African countries.

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

We also provide a wide range of stainless steel hex bolts, hex socket bolts, threaded nuts, hex nuts, and plain washers in various sizes.

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