Table 1B List of Bolting Specifications Applicable ASTM Specifications
Bolting Materials [Note(1)]
H | igh Strength [Note (2)] | Intermediate Strength [Note (3)] | Low Strength [Note (4)] | Nickel and Special Alloy [Note (5)] | ||||||||||
Spec. No. | Grade | Notes | Spec. No. | Grade | Notes | Spec. No. | Grade | Notes | Spec. No. | Grade | Notes | |||
A 193 | B7 | . . . | A 193 | B5 | . . . | A 193 | B8 Cl.1 | (6) | B164 | . . . | (7)(8)(9) | |||
A 193 | B16 | . . . | A 193 | B6 | . . . | A 193 | B8C Cl.1 | (6) | ||||||
A 193 | B6X | . . . | A 193 | B8M Cl.1 | (6) | B166 | . . . | (7)(8)(9) | ||||||
A 320 | L7 | (10) | A 193 | B7M | . . . | A 193 | B8T Cl.1 | (6) | ||||||
A 320 | L7A | (10) | ||||||||||||
A 320 | L7B | (10) | A 193 | B8 Cl.2 | (11) | A 193 | B8A | (6) | B335 | N10665 | (7) | |||
A 193 | B8 Cl.2B | (11) | N10675 | (7) | ||||||||||
A 320 | L7C | (10) | A 193 | B8C Cl.2 | (11) | A 193 | B8CA | . . . | ||||||
A 320 | L43 | (10) | A 193 | B8M Cl.2 | (11) | A 193 | B8MA | . . . | B408 | . . . | (7)(8)(9) | |||
A 193 | B8M Cl.2B | (11) | ||||||||||||
A 354 | BC | . . . | A 193 | B8T Cl.2 | (11) | A 193 | B8TA | (6) | B473 | . . . | (7) | |||
A 354 | BD | . . . | A 320 | B8 Cl.2 | (11) | A 307 | B | (12) | ||||||
A 320 | B8C Cl.2 | (11) | B574 | . . . | (7) | |||||||||
A 540 | B21 | . . . | A 320 | B8F Cl.2 | (11) | A 320 | B8 Cl.1 | (6) | ||||||
A 540 | B22 | . . . | A 320 | B8M Cl.2 | (11) | A 320 | B8C Cl.1 | (6) | ||||||
A 540 | B23 | . . . | A 320 | B8T Cl.2 | (11) | A 320 | B8M Cl.1 | (6) | ||||||
A 540 | B24 | . . . | A 449 | (13) | A 320 | B8T Cl.1 | (6) | |||||||
A 453 | 651 | (14) | ||||||||||||
A 453 | 660 | (14) | ||||||||||||
GENERAL NOTES:
(a) Bolting material shall not be used beyond temperature limits specified in the governing code.
(b) ASME Boiler and Pressure Vessel Code, Section II materials may also be used provided the requirements of the ASME specification are identical or more stringent than the corresponding ASTM specification for the Grade, Class, or Type listed.
NOTES:
(1) Repair welding of bolting material is prohibited.
(2) These bolting materials may be used with all listed materials and gaskets.
(3) These bolting materials may be used with all listed materials and gaskets, provided it has been verified that a sealed joint can be maintained under rated working pressure and temperature.
(4) These bolting materials may be used with all listed materials but are limited to Class 150 and Class 300 joints. See para. 5.3.4 for recommended gasket practices.
(5) These materials may be used as bolting with comparable nickel and special alloy parts.
(6) This austenitic stainless material has been carbide solution treated but not strain hardened. Use A 194 nuts of corres- ponding material.
(7) Nuts may be machined from the same material or may be of a compatible grade of ASTM A 194.
(8) Maximum operating temperature is arbitrarily set at 260°C (500°F) unless the material has been annealed, solution annealed, or hot finished because hard temper adversely affects design stress in the creep rupture range.
(9) Forging quality is not permitted unless the producer last heating or working these parts tests them as required for other permitted conditions in the same specification and certifies their final tensile, yield, and elongation properties to equal or exceed the requirements for one of the other permitted conditions.
(10) This ferritic material is intended for low temperature service. Use A 194 Gr. 4 or Gr. 7 nuts.
(11) This austenitic stainless material has been carbide solution treated and strain hardened. Use A 194 nuts of corres- ponding material.
(12) This carbon steel fastener shall not be used above 200°C (400°F) or below −29°C (−20°F). See also Note (4). Bolts with drilled or undersized heads shall not be used.
(13) Acceptable nuts for use with quenched and tempered bolts are A 194 Gr. 2 or Gr. 2H Mechanical property require- ments for studs shall be the same as those for bolts.
(14) This special alloy is intended for high temperature service with austenitic stainless steel.
