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B8M Class 2 All Thread Rod

ASTM A193/A320 Grade B8M all thread rod is dual certified. The A193 specification covers fasteners that are intended for high temperature and high pressure applications, while A320 covers low temperature applications. Both grades are made from AISI 316 stainless steel and tested to meet requirements per ASTM A193/A320. Dimensional specifications are governed by ASME B18.31.3. A193/A320 B8M all thread rod having diameters above 1" are most common 8UN (8 threads per inch). Non-magnetic, 316 stainless has good corrosion resistance. For use in pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.

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Governing Standards
Mechanical Properties
Chemical Properties

Mechanical Properties

Mechanical PropertiesGrade B8M Class 2 Stainless Steel

AISI 316 Stainless Steel, Carbide Solution Treated, Strain Hardened				Per ASTM A193/A193M-16
Material	Tensile Strength	Yield Strength, 0.2% offset	Elongation in 4D	Reduction of Area	Hardness
Material	Min ksi	Min ksi	Min %	Min %	Max
316 Stainless Steel	110	95	15	45	321 HBW or 35 HRC

AISI 316 Stainless Steel, Carbide Solution Treated, Strain Hardened				Per ASTM A320/A320M-15a
Diameter	Tensile Strength	Yield Strength, 0.2% offset	Elongation in 2 in. or 50 mm	Reduction of Area	Hardness
Diameter	Min ksi	Min ksi	Min %	Min %	Max
3/4" and under	110	95	15	45	321 HBW or 35 HRC
over 3/4 to 1", incl	100	80	20	45	321 HBW or 35 HRC
over 1 to 1 1/4", incl	95	65	25	45	321 HBW or 35 HRC
over 1 1/4 to 1 1/2", incl (1)	90	50	30	45	321 HBW or 35 HRC

1. These upper diameter limits were established on the basis that these were the largest sizes commonly available that consistently met specification property limits. They are not intended as absolute limits beyond which bolting materials could no longer be certified to the specification.

B8M Class 2 All Thread Rod

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Diameter Length Item # Availability Price Quantity UOM

1/2

12 FT

R8M20500000

In Stock

$11.79382/FT

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1/2-13 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD

$11.79382/FT

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$11.79382/ EA
25	$11.13933/ EA
80	$9.98462/ EA
500	$9.57868/ EA

5/8

12 FT

R8M20620000

5-7 Working Days

$21.85506/FT

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5/8-11 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD

$21.85506/FT

Qty

5-7 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$21.85506/ EA
25	$20.64224/ EA
50	$18.50245/ EA
500	$17.7502/ EA

3/4

12 FT

R8M20750000

5-7 Working Days

$34.90559/FT

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3/4-10 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD

$34.90559/FT

Qty

5-7 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$34.90559/ EA
40	$32.96855/ EA
70	$29.55099/ EA
150	$28.34955/ EA

7/8

12 FT

R8M20870000

In Stock

$36.55685/FT

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7/8-9 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD

$36.55685/FT

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$36.55685/ EA
30	$34.52817/ EA
50	$30.94895/ EA
110	$29.69067/ EA

12 FT

R8M21000000

In Stock

$42.74609/FT

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1-8 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD

$42.74609/FT

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$42.74609/ EA
20	$40.37394/ EA
40	$36.18874/ EA
80	$34.71743/ EA

ASTM A193	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.

ASTM A320	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.

Per ASTM A193/A193M-16
Grade	Material	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Nickel	Molybdenum
Grade	Material	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight
B8M	316 Stainless Steel	0.08 max	2.00 max	0.045 max	0.030 max	1.00 max	16.0-18.0	10.0-14.0	2.00-3.00

Per ASTM 320/A320M-15a
Grade	Material	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Nickel	Molybdenum
Grade	Material	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight
B8M	316 Stainless Steel	0.08 max	2.00 max	0.045 max	0.030 max	1.00 max	16.0-18.0	10.0-14.0	2.00-3.00

B8M Class 2 All Thread Rod

Technical Data

Governing Standards

Governing StandardsGrade B8M Class 2 Stainless Steel

Mechanical Properties

Mechanical PropertiesGrade B8M Class 2 Stainless Steel

Chemical Properties

Chemical PropertiesGrade B8M Class 2 Stainless Steel

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1/2-13 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD

5/8-11 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD

3/4-10 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD

7/8-9 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD

1-8 X 12 FT A193/A320 B8M CLASS 2 ALL THREAD ROD