Skip to main content

B8 And 304 SS All Thread Rod

Selected 304 Stainless Steel All Thread RodB8 Class 2 All Thread Rod
304 Stainless Steel All Thread RodB8 Class 2 All Thread Rod

304 Stainless Steel all thread rod is manufactured from 304 stainless steel and tested to meet ASTM A193 and A320 Grade B8, where specified below. ASTM A193 & A320 Grade B8 all thread rod is manufactured from carbide solution treated AISI 304 stainless steel , tested to meet the stringent chemical and mechanical requirements for use in high temperature and high pressure service. Dimensional specifications are governed by ASME B18.31.3. A193/A320 B8 all thread rod having diameters above 1" are most common 8UN (8 threads per inch). 304 stainless steel all thread rod is for general use in harsh atmospheric conditions and some corrosive environments. Grade B8 stainless steel all thread rod is for use in pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. Material is domestic where specified.

Products

Governing Standards

ASTM A193 (1) Covers alloy and stainless steel bolting materials and bolting components for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
ASME B18.31.3 Covers the general and dimensional data for inch series threaded rods.
ASME B1.1 UNC & UNF Class 2A Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.
  1. 1. Only applies to B8 as specified in the "Grade" column below.
ASTM A320 (1) Covers alloy steel bolting materials and bolting components for pressure vessels, valves, flanges, and fittings for low-temperature service.
ASME B18.31.3 Covers the general and dimensional data for inch series threaded rods.
ASME B1.1 UNC & UNF Class 2A Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.
  1. 1. Only applies to B8 as specified in the "Grade" column below.

Mechanical Properties

AISI 304 Stainless Steel, Carbide Solution Treated Per ASTM A193/A193M-16 (1)
Grade Material Tensile
Strength		 Yield Strength,
0.2% offset		 Elongation
in 4D		 Reduction
of Area		 Hardness
Min ksi Min ksi Min % Min % Max
B8 304 Stainless Steel 75 30 30 50 223 HBW or 96 HRB (2)
  1. 1. Only applies to B8 as specified in the "Grade" column below.
  2. 2. For sizes 3⁄4 in. in diameter and smaller, a maximum hardness of 241 HBW (100 HRB) is permitted.
AISI 304 Stainless Steel, Carbide Solution Treated Per ASTM A320/A320M-15a (1)
Grade Material Tensile
Strength		 Yield Strength,
0.2% offset		 Elongation in
2 in. or 50 mm		 Reduction
of Area		 Hardness
Min ksi Min ksi Min % Min % Max
B8 304 Stainless Steel 75 30 30 50 223 HBW or 96 HRB (2)
  1. 1. Only applies to B8 as specified in the "Grade" column below.
  2. 2. For sizes 3⁄4 in. in diameter and smaller, a maximum hardness of 241 HBW (100 HRB) is permitted.

Chemical Properties

Per ASTM A193/A193M-16 (1)
Grade Material Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel
% by weight % by weight % by weight % by weight % by weight % by weight % by weight
B8 304 Stainless Steel 0.08 max 2.00 max 0.045 max 0.030 max 1.00 max 18.0-20.0 8.0-11.0
  1. 1. Only applies to B8 as specified in the "Grade" column below.
Per ASTM 320/A320M-15a (1)
Grade Material Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel
% by weight % by weight % by weight % by weight % by weight % by weight % by weight
B8 304 Stainless Steel 0.08 max 2.00 max 0.045 max 0.030 max 1.00 max 18.0-20.0 8.0-11.0
  1. 1. Only applies to B8 as specified in the "Grade" column below.