ASTM A320 B8CL2螺栓,主要用于石油管道,化工管道,压力容器等行业专用紧固件。范围:耐低温,耐高温专用紧固件
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)
18
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 (癈)
Tensile
Strength
min, ksi
MPa
Yield
Strength. min,
0.2% offset, Ksi
Elongation in
2"
min %
Reduction of
Area
min %
Hardness
max
21/2" and under
1150
(620 ? C )
100(690)
80(550)
18
50
235HB, 99HRB
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
2.00
0.045 Max
0.030 Max
1.00
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
2.00
0.045 Max
0.030 Max
1.00
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)