TECHNICAL STANDARD
DATE: 01 MAY 2003
KBR BOLTING TYPES CARBON AND ALLOY STEEL
P17-1TS
ENGINEERING SERVICES BY KBR TECHNICAL SERVICES, INC.
PAGE 1 OF 2
1. GENERAL 1.1 Scope This standard defines the KBR bolting types for carbon and alloy steel bolting. 1.2 Codes and Industry Standards The following documents are referenced herein and form part of the Order. Current editions of the industry standards including all mandatory addenda in effect at the time of the order shall apply unless otherwise indicated. AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) ASME Boiler and Pressure Vessel Code Section II, "Material Specifications", Part A - "Ferrous Materials" AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM A36/A36M, "Carbon Structural Steel" ASTM A193/A193M, "Alloy Steel and Stainless Steel Bolting Materials for High-Temperature Service" ASTM A194/A194M, "Carbon and Alloy Steel Nuts for Bolts for High-Pressure and High Temperature Service" ASTM A276, "Stainless Steel Bars and Shapes" ASTM A307, "Carbon Steel Bolts and Studs, 60 000 psi Tensile Strength" ASTM A320/A320M, "Alloy Steel Bolting Materials for Low-Temperature Service" ASTM A325, "Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength" ASTM A563, "Carbon and Alloy Steel Nuts" 2. KBR BOLT TYPES 2.1 Numbering System Bolts and nuts are identified by a two part designation as shown in the following example: B
B8
Bolt Style (Table I)
KBR Bolting Type (Table II)
The above example indicates a Machine Bolt of Unstabilized 18Cr-8Ni, AISI Type 304 material. Bolts are purchased to ASTM A320 Gr. B, Class 1 or Class 2, and nuts are purchased to ASTM A194 Gr. 8MA or 8TA. 2.2 Bolt Type Definitions 2.2.1 Bolt style prefixes are defined in Table I. TABLE I - BOLT STYLE PREFIXES Bolt Style Stud Bolt Machine Bolt Cap Screw Stud
Prefix A B C D
TECHNICAL STANDARD KBR BOLTING TYPES CARBON AND ALLOY STEEL
P17-1TS
ENGINEERING SERVICES BY KBR TECHNICAL SERVICES, INC.
PAGE 2 OF 2
DATE: 01 MAY 2003
2.2.2 The material and dimensional specifications for the KBR bolting types, and the material and dimensional specifications for the nuts to be used with various bolting types shall be as defined in Table II. TABLE II - MATERIAL SPECIFICATIONS KBR Bolting Type (2)
Bolt Material (Generic)
AISI Material Type
B5 B6 B7
5Cr 12Cr Cr-Mo
B7M
Cr-Mo
B8N (3)
Unstabilized 18Cr-8Ni Unstabilized 18Cr-8Ni
B8NI
ASTM Specifications (1) Bolts
Nuts
501 410 4140, 4142, or 4145
A193 Gr B5 A193 Gr B6 A193 Gr B7
A194 Gr 3 A194 Gr 6 A194 Gr 2H
4140, 4142, or 4145
A193 Gr B7M
A194 Gr 2HM
304 304
A193 Gr. B8, Cl. 1 or Cl. 2 A193 Gr. B8 Cl. 1
A194 Gr 8MA or 8TA A194 Gr 8A or 8CA
B8 (3)
Unstabilized 18Cr-8Ni
304
A320 Gr. B8, Cl. 1 or Cl. 2
A194 Gr 8MA or 8TA
B8I
Unstabilized 18Cr-8Ni
304
A320 Gr. B8 Cl. 1
A194 Gr 8A or 8CA
B8X
Unstabilized 18Cr-8Ni
304
A320 Gr. B8 Cl. 2
A194 Gr 8MA or 8TA
Stabilized 18Cr-8Ni
347
A193 Gr B8C Cl. 1
A194 Gr 8MA or 8TA
B8CT
321
A193 Gr B8T Cl. 1
A194 Gr 8MA or 8TA
B8M (3)
18Cr-10Ni-2Mo
316
A193 Gr B8M Cl. 1 or Cl. 2
A194 Gr 8MA
B8MI
18Cr-10Ni-2Mo
316
A320 Gr B8M Cl. 1
A194 Gr 8MA
B16 CB
Cr-Mo-V Carbon Steel
-
A193 Gr B16 A307 Gr B
A194 Gr 4 A563 Gr A
HS
Carbon Steel
-
A325 Type 3A
A563 Gr C3 Cl. A
L7
Cr-Mo
A320 Gr L7
A194 Gr 4
S
Carbon Steel (Bar Stock)
4140, 4142, or 4145 1005 to 1025 (4)
A36
A563 Gr A
310
25Cr-20Ni
-
A276 Type 310 (5)
A276 Type 310 (6)
NOTES TO TABLE II: (Numbers in parentheses refer to the following Notes) 1. 2. 3. 4. 5. 6.
ASME specifications are preceded by SA instead of A, and have the same numerical designation (e.g., SA193). ASME materials are in accordance with ASME Section II, Part A. The KBR Bolting Type shall not be marked on the bolting material. Bolting shall be marked in accordance with the applicable material specification only. Either Class 1, solution treated, or Class 2, solution treated and strain hardened, may be used. Carbon content shall not exceed 0.25% to permit possible field welding. Dimensions to A193 Dimensions to A194
