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B8 Class 2 All Thread Rod

ASTM A193/A320 Grade B8 all thread rod is dual certified. The A193 specification covers fasteners intended for high temperature and high pressure applications, while A320 covers low temperature applications. Both grades are made from AISI 304 stainless steel and are tested to meet ASTM A193/A320. 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). Non-magnetic, 304 stainless has good corrosion resistance. For use in pressure vessels, valves, flanges, or other special purpose applications.

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Governing Standards
Mechanical Properties
Chemical Properties

Mechanical Properties

Mechanical PropertiesGrade B8 Class 2 Stainless Steel

AISI 304 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
304 Stainless Steel	125	100	12	35	321 HBW or 35 HRC

AISI 304 Stainless Steel, Carbide Solution Treated, Strain Hardened				Per ASTM A320/A320M-15a
Material	Tensile Strength	Yield Strength, 0.2% offset	Elongation in 2 in. or 50 mm	Reduction of Area	Hardness
304 Stainless Steel	Min ksi	Min ksi	Min %	Min %	Max
3/4" and under	125	100	12	35	321 HBW or 35 HRC
over 3/4 to 1", incl	115	80	15	30	321 HBW or 35 HRC
over 1 to 1 1/4", incl	105	65	20	35	321 HBW or 35 HRC
over 1 1/4 to 1 1/2", incl (1)	100	50	28	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.

B8 Class 2 All Thread Rod

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Diameter Length Item # Availability Price Quantity UOM

1/2

12 FT

RB820500000

5-7 Working Days

$6.98214/FT

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1/2-13 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

$6.98214/FT

Qty

5-7 Working Days

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Quantity	Price
Quantity	Price
1	$6.98214/FT
144	$6.59467/FT
576	$5.91106/FT
1728	$5.67074/FT

5/8

12 FT

RB820620000

5-7 Working Days

$9.41483/FT

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5/8-11 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

$9.41483/FT

Qty

5-7 Working Days

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Quantity	Price
Quantity	Price
1	$9.41483/FT
96	$8.89236/FT
384	$7.97057/FT
1152	$7.64652/FT

3/4

12 FT

RB820750000

5-7 Working Days

$18.40322/FT

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3/4-10 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

$18.40322/FT

Qty

5-7 Working Days

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Quantity	Price
Quantity	Price
1	$18.40322/FT
60	$17.38195/FT
240	$15.58012/FT
720	$14.94669/FT

7/8

12 FT

RB820870000

5-7 Working Days

$24.82435/FT

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7/8-9 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

$24.82435/FT

Qty

5-7 Working Days

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Quantity	Price
Quantity	Price
1	$24.82435/FT
60	$23.44675/FT
240	$21.01624/FT
720	$20.16179/FT

12 FT

RB821000000

5-7 Working Days

$28.27779/FT

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1-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

$28.27779/FT

Qty

5-7 Working Days

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Quantity	Price
Quantity	Price
1	$28.27779/FT
60	$26.70855/FT
144	$23.93991/FT
576	$22.9666/FT

1 1/8

12 FT

RB821120000

5-7 Working Days

$36.68964/FT

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1 1/8-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

$36.68964/FT

Qty

5-7 Working Days

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Quantity	Price
Quantity	Price
1	$36.68964/FT
60	$34.65358/FT
144	$31.06136/FT
576	$29.79851/FT

1 1/4

12 FT

RB821250000

5-7 Working Days

$43.13551/FT

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1 1/4-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

$43.13551/FT

Qty

5-7 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$43.13551/FT
60	$40.74175/FT
144	$36.51842/FT
576	$35.03371/FT

1 3/8

12 FT

RB821370000

5-7 Working Days

$62.24369/FT

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1 3/8-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

$62.24369/FT

Qty

5-7 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$62.24369/FT
60	$58.78954/FT
144	$52.69536/FT
576	$50.55295/FT

1 1/2

12 FT

RB821500000

5-7 Working Days

$75.27335/FT

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1 1/2-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

$75.27335/FT

Qty

5-7 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$75.27335/FT
60	$71.09614/FT
144	$63.72624/FT
576	$61.13535/FT

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
Grade	Material	% 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

Per ASTM 320/A320M-15a
Grade	Material	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Nickel
Grade	Material	% 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

B8 Class 2 All Thread Rod

Technical Data

Governing Standards

Governing StandardsGrade B8 Class 2 Stainless Steel

Mechanical Properties

Mechanical PropertiesGrade B8 Class 2 Stainless Steel

Chemical Properties

Chemical PropertiesGrade B8 Class 2 Stainless Steel

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1/2-13 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

5/8-11 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

3/4-10 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

7/8-9 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

1-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

1 1/8-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

1 1/4-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

1 3/8-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD

1 1/2-8 X 12 FT A193/A320 B8 CLASS 2 ALL THREAD ROD