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High Temperature High Tension Alloy Bolt Material  Chemical & Mechanical Requirements

 
 
ASTM A193 B7 (Cr- Mo AISI 4140,4142,4145 )
This material is considered as the most suitable  for bolts to be used at temperature below 450 °. C, with a minimum effect on its structural strength during application at a high temperature.The material has the following chemical properties and physical Characteristics.
 
C Mn P S Si Cr Mo
0.37-0.49 0.65-1.10 0.035 Max 0.04 Max 0.15-0.35 0.75-1.20 0.15-0.25
Dia Minimum Tempering Temperature ( ° F ) Tensile Strength min, ksi ( MPa) Yield Strength. min, 0.2% offset, Ksi ( MPa) Elongation in 4D min % Reduction of Area min % Hardness max
21/2" and under 1,100
(593 ° C )
125(860) 105(720) 16 50 321HB or 35 HRc
over 21/2" to 4" 1,100
(593 ° C )
115(795) 95(655) 16 50 302HB or 35 HRc
over   4" to 7" 1,100
(593 ° C )
100(690) 75(515) 16 50 277HB or 29 HRc
 
ASTM A1193 B7M (Cr- Mo AISI 4140,4142,4145 )
C Mn P S Si Cr Mo
0.37-0.49 0.65-1.10 0.035 Max 0.04 Max 0.15-0.35 0.75-1.20 0.15-0.25
Dia Minimum Tempering Temperature ( ° F ) Tensile Strength min, ksi ( MPa) Yield Strength. min, 0.2% offset, Ksi ( MPa) Elongation in 2D min % Reduction of Area min % Hardness max
21/2" and under 1,150
(620 ° C )
100(690) 80(550) 18 50 235HB, 99HRB
 
ASTM A193 B16 (Cr- Mo -V )
This material is considered as the most suitable  for bolts to be used at temperature below 450 °. C,even at a high  temperature range, the material has superior physical characterestics compared to ASTM A193 B7 previously mentioned.The chemical properties and physical characteristics are as follows
 
C Mn P S Si Cr Mo
0.36-0.47 0.65-1.10 0.035 Max 0.04 Max 0.15-0.35 0.75-1.20 0.15-0.25
Dia Minimum Tempering Temperature ( ° F ) Tensile Strength min, ksi ( MPa) Yield Strength. min, 0.2% offset, Ksi ( MPa) Elongation in 4D min % Reduction of Area min % Hardness max
21/2" and under 1200(650) 125(860) 105(720) 18 50 321HB
or 35 HRc
over
21/2" to 4"
1200(650) 110(760) 95(655) 17 45 302HB
or 35 HRc
over  
4" to 7"
1200(650) 100(690) 85(586) 16 45 277HB
or 29 HRc
 
ASTM A193 B5 (5% Cr AISI 501)
C Mn P S Si Cr Mo
0.10 max 1.00 max 0.040 max 0.030 Max 1.0 Max 4.00 - 6.00 0.40 -0.65
Dia Minimum Tempering Temperature ( ° F ) (°C) Tensile Strength min, ksi ( MPa) Yield Strength. min, 0.2% offset, Ksi ( MPa) Elongation in 2D min % Reduction of Area min % Hardness max
up to 4" incl 1.100 (593 ) 100(690) 80(550) 16 50 -
 
ASTM A193 B8 (AISI 304) B8A  Chemical Requirements
C
Mn
P
S
Si
Cr
Ni
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
18.00 - 20.00
8.00 -10.50
 
ASTM A193 B8C (AISI 347) B8CA
C
Mn
P
S
Si
Cr
Ni
Columbium + Tantalum
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
17.00 - 19.00
9.00 -13.00
10 x Carbon
content, min
 
ASTM A193 B8N (AISI 304N) B8NA
C
Mn
P
S
Si
Cr
Ni
Nitrogen
0.08 Max 2.00 Max 0.045 Max 0.030 Max 1.00 Max 18.00 - 20.00 8.00 -10.50 0.10 - 0.16
 
ASTM A193 B8MN (AISI 316N) B8MNA
C Mn P S Si Cr Ni Mo Nitrogen
0.08 Max 2.00 Max 0.045 Max 0.030 Max 1.00 Max 16.00 - 18.00 10.00 -14.00 2.00 - 3.00 0.10 - 0.16
 
ASTM A193 B8P (AISI 305) B8PA
C
Mn
P
S
Si
Cr
Ni
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
17.00 - 19.00
10.50 -13.00
 
ASTM A193 B8T (AISI 321) B8TA
C
Mn
P
S
Si
Cr
Ni
Titanium
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
17.00 - 19.00
9.00 -12.00
5 x Carbon content, min
 
ASTM A193 B8R B8RA
C
Mn
P
S
Si
Cr
Ni
Mo
Nitrogen
Columbium + Tanalum
V
0.06 Max
4.00 - 6.00
0.040 Max
0.030 Max
1.00 Max
20.50 - 23.50
11.50 -13.50
1.50 - 3.00
0.20 - 0.40
0.10 - 0.30
0.10 - 0.30
 
ASTM A193 B8S B8SA
C
Mn
P
S
Si
Cr
Ni
Nitrogen
0.10 Max
7.00 - 9.00
0.040 Max
0.030 Max
3.50 - 4.50
16.00 - 18.00
8.00 - 9.00
0.08 - 0.18
 
ASTM A193 B8LN, B8LNA
C
Mn
P
S
Si
Cr
Ni
Mo
Nitrogen
0.030 Max
2
0.045 Max
0.030 Max
1
18.00 - 20.00
8.00 - 10.50
-
0.10 - 0.16
 
B8MLN, B8MLNA
C
Mn
P
S
Si
Cr
Ni
Mo
Nitrogen
0.030 Max
2
0.045 Max
0.030 Max
1
16.00 - 18.00
10.00 - 14.00
2.00 - 3.00
0.10 - 0.16
 
CLASS I: B8, B8C, B8M, B8P, B8T, B8LN, B8MLN Mechanical Requirements
Dia
Heat Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of Area min %
Hardness max
All diameters
Carbide Solution Treated
75(515)
30(205)
30
50
223 HB or 96HRB
(3/4" in & smaller, 241HB or 100 HRB)
 
CLASS IA: B8A, B8CA, B8MA, B8PA, B8TA, B8LNA, B8MLNA, B8NA, B8MN4
Dia
Heat Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of Area min %
Hardness max
All diameters
Carbide Solution Treated in the finished conditions
75(515)
30(205)
30
50
192 HB
or 90HRB
 
CLASS IB: B8N, B8MN
Dia
Heat Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of Area min %
Hardness max
All diameters
Carbide Solution Treated
80(550)
35(240)
30
40
223 HB or 96HRB
(3/4" in & smaller, 241HB or 100 HRB)
 
CLASS IC: B8R
Dia
Heat
Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of
Area min %
Hardness max
All diameters
Carbide Solution
Treated
100(690)
55(380)
35
55
271 HB
or 28 HRC
 
CLASS IC: B8RA
Dia
Heat
Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of
Area min %
Hardness max
All diameters
Carbide Solution Treated in the finished condition
100(690)
55(380)
35
55
271 HB
or 28 HRC
 
CLASS IC: B8S
Dia
Heat
Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of
Area min %
Hardness max
All diameters
Carbide Solution Treated
95(655)
50(345)
35
55
271 HB
or 28 HRC
 
CLASS IC: B8SA
Dia
Heat
Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of
Area min %
Hardness max
All diameters
Carbide Solution Treated in the finished condition
95(655)
50(345)
35
55
271 HB
or 28 HRC
 
CLASS 2: B8, B8C, B8P, B8T, B8N
Dia Heat
Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of
Area min %
Hardness max
3/4" & under Carbide Solution Treated and strain
Hardened
125(860) 100(690) 12 35 321 HB
or 35 HRC
over 3/4" & 1" incl 115(795) 80(550) 15 35
over 1" & 11/4" incl 105(725) 65(450) 20 35
11/4" to 11/2" incl 100(690) 50(345) 28 45
 
CLASS 2: B8MN / B8M
Dia Heat
Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of
Area min %
Hardness max
3/4" & under Carbide Solution Treated and strain
Hardened
110(760) 95(655) 15 45 321 HB
or 35 HRC
over 3/4" & 1" incl 100(690) 80(550) 20 45
over 1" & 11/4" incl 95(655) 65(450) 25 45
11/4" to 11/2" incl 95(655) 75(515) 25 40
 
CLASS 2B: B8M2
Dia Heat
Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of
Area min %
Hardness max
2" & under Carbide Solution Treated and strain
Hardened
95(655) 75(515) 25 40 321 HB
or 35 HRC
over 2" & 21/2" incl 90(620) 65(450) 30 40
over 21/2" to 3" incl 80(550) 55(380) 30 40
 
ASTM A 320 L7M
Dia Heat
Treatement
Tensile Strength. min, ksi (MPa)
Yield Strength min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Reduction of
Area min %
Hardness max
21/2" and under Quenched and tempered at 1,150 °  F
(620 °  C) min
100(690) 80(550) 18 50 235HB
or 99HRB
 
ASTM A320 B8 (18Cr-8Ni AISI 304)
This material is considered as the most suitable for bolts and nuts to be used at temperatures (-)100-(-)200 °  C The chemical properties are as follows:
C
Mn
P
S
Si
Cr
Ni
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
18.00-20.00
8.00-10.50
 
ASTM A320 B8M
C
Mn
P
S
Si
Cr
Ni
Mo
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
16.00-18.00
10.00-14.00
2.00-3.00
 
ASTM A320 B8C
C
Mn
P
S
Si
Cr
Ni
Columbium + Tantulum
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
17.00-19.00
9.00-13.00
10 * Carbon content, min
 
ASTM A320 B8T
C
Mn
P
S
Si
Cr
Ni
Titanium
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
17.00-19.00
9.00-12.00
5 * Carbon content, min
 
Super High Temperature Resistant Bolt Material Chemical & Mechanical Requirements
This material is considered as suitable for bolts to be used as temperature below 1,200 °   F (650 °  C) and the material has superior resistence to oxidation and shrinkage to those high temperature resistant bolt material mentioned so far. The chemical properties and physical characteristics are as follows:
ASTM A453 Gr. 660
C
Mn
P
S
Si
Cr
0.08 Max
2.00 Max
0.040 Max
0.030 Max
1.00 Max
24.00-27.00
Ni
Mo
Ti
Al
V
Boron
13.50-16.00
1.00-1.50
1.90-2.35
0.35 Max
0.10-0.50
0.0010 - 0.010
CLASS
Tensile Strength.
min, Ksi (MPa)
YieldStrength. min,0.2% offset, Ksi(MPa)
Elongation in 4x Dia. min, %
Reduction of Area min, %
Brinell Hardness Number
A,B and C
130(895)
85(585)
15
18
248-341 (min 99HRB, max 37HRC)
 
ASTM B408 (800,800H)
Ni
Cr
Fe
Mu
C
Cu
Si
S
Al
Ti
30.0 - 35.0
19.0 - 23.0
*39.5 min
1.5 Max
0.10 Max
0.75 Max
1.0 Max
0.015 Max
0.15 - 0.60
0.15 - 0.60
 
* = Iron shall be determined arithmetically by differenece
 
HASTALLOY C/ASME SB336,UNS N10002
Class
Ni
Co
Cr
Mo
W
Fe
Si
Mn
C
C
Balance
< 2.5
16
16
4
5
< 1.00
< 1.00
< 0.08
 
Monel K-500
Ni C Mn Fe S Si Cu Al Ti
63 - 70 0.25 Max 1.50 Max 2.00 Max 0.01 Max 0.5 Max balance 2.3 - 3.15 0.35 - 0.85
 
Monel 400
Ni
C
Mn
Fe
S
Si
Cu
63 - 70
0.30 Max
2.0 Max
2.5 Max
0.024 Max
0.050 Max
balance
 
Nut Material Chemical & Mechanical Requirements
 
ASTM A194 Gr.2H
This is the material for bolts made from ASTM A-193 B7, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :
C
Mn
P
S
Si
Brinell Hardness
Rockwell Hardness
0.40 Min
1.00 Max
0.040 Max
0.050 Max
0.40 Max
To 11/2" incl 248 to 352
24 to 38 HRC
Over 11/2",
212 to 352
38 HRC Max
 
ASTM A194 Gr.2HM
C
Mn
P
S
Si
Brinell Hardness
Rockwell Hardness
0.40 Min
1.00 Max
0.040 Max
0.050 Max
0.40 Max
159 to 237
22 HRC Max
 
ASTM A194 Gr.4
This material is considered as the most suitable for nuts,when they are used with bolts made from ASTM A-193 B16 and A-320 L7. Even at high temperature range. then material has superior physical characteristics to those ASTMA A-194 2H previously mentioned. The chemical properties and physical characteristics are as follows :
C
Mn
P
S
Si
Mo
Brinell Hardness
Rockwell Hardness
0.40 - 0.50
0.70 - 0.90
0.035 Max
0.04 Max
0.15 - 0.35
0.20 - 0.30
248 to 352
24 to 38 HRC
 
ASTM A194 Gr. 8 (AISI 304)
This is nut material for bolts made from ASTM A-193 B8, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :
C
Mn
P
S
Si
Cr
Ni
Brinell Hardness
Rockwell Hardness
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
18.00 - 20.00
8.00 - 10.50
126 to 300
60 to 105 HRB
 
ASTM A194 Gr. 8M (AISI 316)
This is nut material for bolts made from ASTM A-193 B8M and A-320 B8M, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :
C
Mn
P
S
Si
Cr
Ni
Mo
Brinell Hardness
Rockwell Hardness
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
16.00 - 18.00
10.00 - 14.00
2.00 - 3.00
126 to 300
60 to 105 HRB
 
ASTM A194 Gr. 8C (AISI 347)
This is nut material for bolts made from ASTM A-193 B8C, A-320 B8Cand A-320 B8T, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :
 
C
Mn
P
S
Si
Cr
Ni
Cb + Ta
Brinell Hardness
Rockwell Hardness
0.08 Max
2.00 Max
0.045 Max
0.030  Max
1.00 Max
17.00 - 19.00
9.00 - 13.00
10 * C% min
126 to 300
60 to 105 HRB
 
ASTM A194 Gr. 8T (AISI 321)
This is nut material for bolts made from ASTM A-193 B8Tand A-320 B8T, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :
C
Mn
P
S
Si
Cr
Ni
Ti
Brinell Hardness
Rockwell Hardness
0.08 Max
2.00 Max
0.045 Max
0.030 Max
1.00 Max
17.00 - 19.00
9.00 - 12.00
5 C% min
126 to 300
60 to 105 HRB
 
ASTM A307
This material is suitable in structural application where nominal strength alongwith weldability is required.
Grade
P
S
Tensile Strength min, ksi (MPa)
Yield Strength. min, 0.2% offset, Ksi (MPa)
Elongation in 2" min %
Hardness max
A
0.06 Max
0.15 Max
60 (415)
-
18
121 - 241 BHN
B
0.04 Max
0.05 Max
60 - 100
(415 - 690)
-
18
121 - 212 BHN
C
-
-
58 - 80
(400 - 550)
36(50)
23
Not Required
 
ASTM A563
This specification of material is used for manufactoring nuts for balts/styds made from ASTM A307
Grade
C
Mn (Max)
P  (Max)
S (Max)
O,A,B,C
0.58 Max
-
0.13
-
D
0.58 Max
0.27
0.048
0.058
DH
0.18-0.58
0.57
0.048
0.058
 
Grade Hardness Required
O 103 to 302 BHN
A 116 to 302 BHN
B 90 to 121 BHN
C 143 to 352 BHN
D 159 to 352 BHN
DH 248 to 352 BHN
 
 
   
   
 
 
 
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