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Fastener Specifications
MaterialSelection |
Temperature
Range | Material Bolt/Nut | | 1000C - 2000C | A320B8/Gr .8 | | 460C - 1000C | A320L7/Gr .4 | | 00C - 450C | A320L7/Gr .4
SNB7/S45C | | 00C - 3000C | A307 SS400 | | 3000C - 4000C | A193B7/Gr .2H
B7/2H
SNB7/S45C | | 4000C - 5500C | A193B16/Gr .4 |
| Temperature
Range | Material Bolt/Nut | | 5500C- 6500C | A193B8/Gr .8 | | A193B8M/Gr .8M | | 6500C | A453Gr.660,
A453Gr.660/Gr 8C | | 7500C | Hastalloy B& C | | 10000C | Chromium Alloy |
|
HighTemperature 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 temperaturebelow 450 0. C, with a minimum effect on its structural strength during application at ahigh 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
( 0 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
(593oC ) | 125(860) | 105(720) | 16 | 50 | 321HB
or 35 HRc | | over 21/2" to 4" | 1,100
(593oC ) | 115(795) | 95(655) | 16 | 50 | 302HB
or 35 HRc | | over 4" to 7" | 1,100
(593oC ) | 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
0 F (0C) | 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
(620oC ) | 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 temperaturebelow 450oC,even at a high temperature range, the material has superior physicalcharacterestics compared to ASTM A193 B7 previously mentioned.
The chemical properties and physical characteristics are as follows | | C | Mn | P | S | Si | Cr | Mo | Al | V | | 0.36-0.47 | 0.45-0.70 | 0.035 Max | 0.04 Max | 0.15-0.35 | 0.80-1.15 | 0.50-0.65 | 0.015Max | 0.25-0.35 | | Dia | Minimum
Temperature
oF (0C) | 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(725) | 18 | 50 | 321HB
or 35 HRC | over
21/2" to 4" | 1200(650) | 110(760) | 95(655) | 17 | 45 | 302HB
or 33 HRC | | over 4" to7" | 1200(650 ) | 100(690) | 85(586) | 16 | 45 | 227HB
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
oF (0C) | Tensile
Strength
min, ksi
(MPa) | Yield
Strength. min,
0.2% offset, Ksi
(MPa) | Elongation in
2"
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 | 2.00 | 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 | CarbideSolution 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 | CarbideSolution 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 | CarbideSolution 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 | CarbideSolution 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 | CarbideSolution 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 | CarbideSolution 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 | CarbideSolution 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 | CarbideSolution Treated and
strain
Hardened | 125(860) | 100(690) | 12 | 35 | 321HB
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 | CarbideSolution Treated and
strain
Hardened
| 110(760) | 95(655) | 15 | 45 | 321HB
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 | CarbideSolution Treated and
strain
Hardened | 95(655) | 75(515) | 25 | 40 | 321HB
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 |
|
Low-TemperatureAlloy Steel Bolt Material Chemical & Mechanical Requirements
ASTM A320-L7 (Cr- Mo AISI 4140,4142,4145 )
This material is considered as the most suitable for bolts to be used at temperature0-(-)100oC,
The chemical properties and physical characteristics are as follows: |
| C | Mn | P | S | Si | Cr | Mo | Impact EnergyAbsorption Requirements | | 0.38-0.48 | 0.75-1.00 | 0.035 Max | 0.04 Max | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | Minimum Impact Value | Minimum Impact Value | | Dia | Tensile
Strength
min, ksi
(MPa) | Yield
Strength. min,
0.2% offset, Ksi
(MPa) | Elongation in
2"
min % | Reduction of
Area
min % | Hardness
max | | Required for Average of Eachset of three specimens
ft lbf [J] | Permitted for Specimen only ofa set
ft lbf [J | | 21/2" and under | 125
( 860 ) | 105
( 725 ) | 16 | 50 | 277-321HB
for reference | | 20[27] | 15[20] |
| | ASTM A 320 L7M| Dia. | Heat Treatment | 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 1,150oF
(620oC) 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 attemperatures (-)100-(-)200oC 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 BoltMaterial Chemical & MechanicalRequirements
This material is considered as suitable for bolts to be used as temperature below 1,200oF (650oC) and the material has superior resistence to oxidation andshrinkage to those high temperature resistant bolt material mentioned so far. The chemicalproperties 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 | | Cr | 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, ks
(MPa) | Yield
Strength. 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 A453 Gr. 651 | C | Mn | P | S | Si | Cr | | 0.28 - 0.35 | 0.75 -1.50 | max 0.040 | max 0.030 | 0.30 - 0.80 | 8.00-11.00 | | Cr | Mo | Ti | W | Cb | Cu | | 18.00-21.00 | 1.00-1.75 | 0.10 - 0.35 | 1.00 - 1.75 | 025 - 0.60 | max 0.50 | | CLASS | Tensile
Strength
min, ks
(MPa) | Yield
Strength. min,
0.2% offset, Ksi
(MPa) | Elongation in
4x Dia
min, % | Reduction of
Area
min, % | Brinell Hardness Number | | A ( 3" and under) | 100(690) | 70(485) | 18 | 35 | 217-277 (min 95HRB, max 28HRC) | | A (over 3") | | 60(415) | | | | | B ( 3" and under) | 95(655) | 60(415) | 18 | 35 | 217-277 (min 95HRB, max 28HRC) | | B (over 3") | | 50(345) | | | |
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 | CLASS | CONDITION | Tensile
Strength
min, ksi
(MPa) | Yield
Strength. min, Ksi
(MPa) | Elongation in
%
min | | 800 | (all sizes) Hot finished rodsand bars | 80(550) | 35(240) | 25 | | (all sizes) Cold drawn and(annealed) Hot finished rods and bars | 75(520) | 30(205) | 30 | | 800H | (all sizes) Cold drawn and(annealed) Hot finished rods and bars | 65(450) | 25(170) | 30 |
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 withsuitable heat treatment. The chemical properties and physical characteristics are asfollows : | 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 boltsmade from ASTM A-193 B16 and A-320 L7. Even at high temperature range. then material hassuperior physical characteristics to those ASTMA A-194 2H previously mentioned. Thechemical 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 withsuitable heat treatment. The chemical properties and physical characteristics are asfollows : | 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 beused with suitable heat treatment. The chemical properties and physical characteristicsare 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 physicalcharacteristics 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 beused with suitable heat treatment. The chemical properties and physical characteristicsare 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 alongwithweldability is required. | Grade | P | S | Tensile
Strength
min, ksi
(MPa) | Yield
Strength. min,
0.2% offset, Ksi
(MPa) | Elongationin
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 fromASTM 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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