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ASTM A193 Bolts

ASTM A193 Bolts

The specification for ASTM A193 covers alloy and stainless steel bolting for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. The ASTM A193 specification covers bars, bolts, screws, studs, stud bolts, and wire. The material may be further processed by centerless grinding or by cold drawing. Below are some of the ASTM A193 grades used commonly by Atlanta Rod.

A193 Bolts

See Also: ASTM A194 Nuts

Common ASTM A193 grades used by Atlanta Rod:

ASTM A193 B7                             Alloy steel, AISI 4140 or 4142, quenched and tempered

ASTM A193 B6                             Stainless steel, AISI 410, heat treated

ASTM A193 B8                             Class 1 Stainless steel, AISI 304, carbide solution treated.

ASTM A193 B8M                         Class 1 Stainless steel, AISI 316, carbide solution treated.

ASTM A193 B8 Class 2                Stainless steel, AISI 304, carbide solution treated, strain hardened

ASTM A193 B8M Class 2            Stainless steel, AISI 316, carbide solution treated, strain hardened

ASTM A193 B8T                          Class 1 or 2 Stainless steel, AISI 321, with additional element of Titanium

ASTM A193 B16                          Chromium-Molybdenum-Vanadium, similar to B7 with Vandium added

ASTM A193 B7M                         Similar properties as B7 but with specialized heat treating to create differing mechanical properties

ASTM A193 B8R                          Stainless steel, AISI 209, also known as Nitronic 50, nitrogen strengthened

ASTM A193 B8S                           Stainless Steel, AISI 218, also known as Nitronic 60, nirtrogen strengthened

See Also: ASTM A193 at ASTM.org.

ASTM A193 Characteristics

Grade Description Diameter Tensile Strength, min. Yield Strength, min. Hardness, max. Marking
ASTM A193 B6 S41000 (410) Up to 4” 110 85 B6
ASTM A193 B7 Chromium-Molybdenum 2 1/2” and under 125 105 321 HB or 35 HRC B7
over 2 1/2” to 4” 115 95 321 HB or 35 HRC
over 4” to 7” 100 75 321 HB or 35 HRC
ASTM A193 B7M Chromium-Molybdenum 4” and under 100 80 235 HB or 99 HRB B7M
over 4” to 7” 100 75 235 HB or 99 HRB
ASTM A193 B16 Chromium-Molybdenum- Vanadium 2 1/2” and under 125 105 321 HB or 35 HRC B16
over 2 1/2” to 4” 110 95 321 HB or 35 HRC
over 4” to 8” 100 85 321 HB or 35 HRC
ASTM A193 B8 class 1 S30400 (304) all 75 30 223 HB or 96 HRB B8
ASTM A193 B8 class 2 S30400 (304) 3/4” and under 125 100 321 HB or 35 HRC B8SH
over 3/4” to 1” 115 80 321 HB or 35 HRC
over 1” to 1 1/4” 105 65 321 HB or 35 HRC
over 1 1/4” to 1 1/2” 100 50 321 HB or 35 HRC
ASTM A193 B8C class 1 S34700 (347) all 75 30 223 HB or 96 HRB B8C
ASTM A193 B8C class 2 S34700 (347) 3/4” and under 125 100 321 HB or 35 HRC B8CSH
over 3/4” to 1” 115 80 321 HB or 35 HRC
over 1” to 1 1/4” 105 65 321 HB or 35 HRC
over 1 1/4” to 1 1/2” 100 50 321 HB or 35 HRC
ASTM A193 B8M class 1 S31600 (316) all 75 30 223 HB or 96 HRB B8M
ASTM A193 B8M class 2 S31600 (316) 3/4” and under 110 95 321 HB or 35 HRC B8MSH
over 3/4” to 1” 100 80 321 HB or 35 HRC
over 1” to 1 1/4” 95 65 321 HB or 35 HRC
over 1 1/4” to 1 1/2” 90 50 321 HB or 35 HRC
ASTM A193 B8T class 1 S32100 (321) all 75 30 223 HB or 96 HRB B8T
ASTM A193 B8T class 2 S32100 (321) 3/4” and under 125 100 321 HB or 35 HRC B8TSH
over 3/4” to 1” 115 80 321 HB or 35 HRC
over 1” to 1 1/4” 105 65 321 HB or 35 HRC
over 1 1/4” to 1 1/2” 100 50 321 HB or 35 HRC
ASTM A193 B8R S20910 all 100 55 271 HB or 28 HRC B8R
ASTM A193 B8S S21800 all 95 50 271 HB or 28 HRC B8S

 

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