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Studs/Bolts/Nuts
THREADED ROD / STUD / BOLT / NUT / WASHER
ASME SA 193 Grade B7, Grade B7M, Grade B16
ASTM A 193 Grade B7, Grade B7M, Grade B16
ASME SA 320 Grade L7, Grade L7M, Grade L43
ASTM A 320 Grade L7, Grade L7M, Grade L43
ASME SA 194 Grade 2H, Grade 2HM, Grade 3, Grade 4, Grade 7, Grade 7M, Grade 16
ASTM A 194 Grade 2H, 2HM, 3, 4, 7, 7M, 16
ASME SA 193 Grade B8, Grade B8M, Grade B8 Class 2, Grade B8M Class 2
ASTM A 193 Grade B8, B6M, B8 Class 2, B8M Class 2
ASME SA 320 Grade B8, Grade B8M, Grade B8 Class 2, Grade B8M Class 2
ASTM A 320 Grade B8, B8M, B8 Class 2, B8M Class 2
ASME SA 307 Grade A, B, C Carbon Steel Bolt and Stud 60000 PSI Tensile Strength
ASTM A 307 Grade A, B, C Carbon Steel Bolt and Stud 60,000 PSI Tensile Strength
ASME SA 194 Grade 8, Grade 8M, Grade 8F, Grade 8A, Grade 8C, Grade 6, Grade 310
ASTM A 194 Grade 8, 8M, 8F, 8A, 8C, 6, 310
Stainless Steel Carbide Solution Treated & Strain Hardened Threaded Bar, Rod, Stud
Roll Threaded Bars, Roll Threaded Rods, Roll Threaded Studs
B-8 Class-1 Stainless Steel AISI 304 / 304L Carbide Solution Treated
B-8 Class-2 Stainless Steel AISI 304 / 304L Carbide Solution Treated, Strain Hardened
B-8M Class-1 Stainless Steel AISI 316 / 316L Carbide Solution Treated
B-8M Class-2 Stainless Steel AISI 316 / 316L Carbide Solution Treated, Strain Hardened
B-8C Stainless Steel AISI 347 / 347H Carbide Solution Treated, Strain Hardened
B-8T Stainless Steel AISI 321 / 321H Carbide Solution Treated, Strain Hardened
B-8P Stainless Steel AISI 305 Carbide Solution Treated, Strain Hardened
Threaded Rod / Threaded Bar DIN 975, Stud Bolt DIN 976
Hexagon Bolt DIN 601, DIN 931, DIN 933, Hexagon Nut DIN 555, DIN 934
Plain Washer DIN 125, Stud Metal End DIN 938, DIN 939, DIN 940
Property Class : 4.8, 5.6, 5.8, 8.8, 10.9, 12.9
Coating : Bright Zinc Plated, Hot Dip Galvanised, Phosphatided, Nickel Plated
Material : 22CrMo4, 24CrMo4, 25CrMo4, 26CrMo4, 34CrMo4, 42CrMo4, 34CrNiMo6, 41CrNiMo6
Material : AISI 4130, SAE 4130, AISI 4140, SAE 4140, AISI 4145, SAE 4145, AISI 4340, SAE 4340
Material : EN 8, EN 9, EN 19, EN 24 Condition : Normalised, Tempered, Quenched & Tempered
HEAT-TREATED ALLOY STUDS, BOLTS THREADED BARS & RODS
Chemical Composition
| Elements |
A354 Grades BC, BD |
A193 Grade B7 |
| **See Note Below |
Chromium-Molybdenum |
Range percentCheck variation
over percentRange percent |
Check variation
over or under percent |
| Carbon... |
----*0.38-0.48 |
0.02 |
| Manganese... |
----0.750-1.00 |
0.04 |
| Phosphorus, max... |
0.040.0050.04 |
0.005 over |
| Sulphur, max... |
0.040.0050.04 |
0.005 over |
| Silicon... |
----0.20-0.35 |
0.02 |
| Chromium... |
----0.80-1.10 |
0.05 |
| Molybdenum... |
----0.15-0.25 |
0.02 |
| Elements |
A193 Grade B16
Chromium-Molybdenum-Vanadium |
| Range percent |
Check variation
over or under percent |
| Carbon... |
0.36-0.44 |
0.02 |
| Manganese... |
0.45-0.70 |
0.03 |
| Phosphorus, max... |
0.04 |
0.005 over |
| Sulphur, max... |
0.04 |
0.005 over |
| Silicon... |
0.20-0.35 |
0.02 |
| Chromium... |
0.80-1.15 |
0.05 |
| Molybdenum... |
0.50-0.65 |
0.03 |
| Vanadium... |
0.25-0.35 |
0.03 |
| Elements |
A320 Grade L7 |
A320 Grade L43 |
Chromium-Molybdenum
(AISI 4140, 4142, 4145) |
Nickel-Chromium-Molybdenum
(AISI 4340) |
Range percentCheck variation
over percentRange percent |
Check variation
over or under percent |
| Carbon... |
*0.38-0.480.020.38-0.148 |
0.02 |
| Manganese... |
0.75-1.000.040.60-0.85 |
0.03 |
| Phosphorus, max... |
0.040.005 over0.04 |
0.005 over |
| Sulphur, max... |
0.040.005 over0.04 |
0.005 over |
| Silicon... |
0.20-0.350.020.20-0.35 |
0.02 |
| Nickel... |
----1.65-2.00 |
0.05 |
| Chromium... |
0.80-1.100.050.70-1.90 |
0.03 |
| Molybdenum... |
0.15-0.250.020.20-0.30 |
0.02 |
*For bar sizes over 3-1/2 in. to 4 in., inclusive, the carbon content may be 0.50 pct. max.** Any alloy steel capable of meeting the tensile requirements of Specification A354 may be used.
Tensile Requirements
GradeDiameter, in.Min
tempering
temp FTensile
strength
min psiYield
point
min psiElongation
in 2 in.
min pct |
Reduction
of area
min pct |
A354 Grade BC{2-1/2 and under
{Over 2-1/2 to 4 incl. |
850125,000109,00016 |
50 |
| A354 Grade BD1-1/2 and under |
850115,00099,00016 |
45 |
A193 Grade B7
Chromium-
Molybdenum{2-1/2 and under
{Over 2-1/2 to 4 incl.
{Over 4 to 7 incl. |
850150,000125,00014 |
35 |
A193 Grade B16
Chromium-
Molybdenum-
Vanadium |
{2-1/2 and under
{Over 2-1/2 to 4 incl.
{Over 4 to 7 incl. |
1100
1100
1100125,000
115,000
100,000105,000
95,000
75,00016
16
18 |
50
50
50 |
A320 Grade L7
Chromium-
Molybdenum |
2-1/2 and under--125,000105,00016 |
50 |
A320 Grade L43
Nickel-Chromium-
Molybdenum |
4 and under--125,000105,00016 |
50 |
Commonly used are the following grades of heat-treated alloy steel for high-pressure or extreme temperature service in diameters of 1/2 in. to 2 in., inclusive. Other grades and other diameters are available on special order.ASTM A354, Grades BC and BD - heat-treated alloy steels for applications at normal atmospheric temperatures where high strength is required.ASTM A193, Grade B7 - a heat-treated chromium-molybdenum steel widely used for medium high-temperature service.ASTM A193, Grade B16 - a heat-treated chromium-molybdenum-vanadium steel for high-pressure, high-temperature service.ASTM A320, Grade L7 - This grade is intended for low-temperature service down to minus 150ºF and has a minimum Charpy impact value of 15 ft-lb at this temperature. Sizes 2-1/2 in. and under.ASTM A320, Grade L43 - The same properties offered by Grade L7 in sizes up to 2-1/2 are obtainable up to 4 in. in Grade L43
ASTM, SAE AND ISO GRADE MARKINGS AND MECHANICAL PROPERTIES FOR STEEL FASTENERS
Identification
Grade MarkSpecificationFastener
DescriptionMaterialNominal Size
Range (in.) |
Mechanical Properties |
Proof Load
(psi)Yield Strength
Min (psi) |
Tensile Strength
Min (psi) |
No
Grade
Mark |
SAE J429
Grade 1 |
Bolts,
Screws,
Studs |
Low or Medium Carbon Steel1/4 thru 1-1/233,00036,000 |
60,000 |
ASTM A307
Grades A&BLow Carbon Steel1/4 thru 4-- |
-- |
SAE J429
Grade 2Low or Medium Carbon Steel1/4 thru 3/4 Over 3/4 to 1-1/255,000
33,00057,000
36,000 |
74,000
60,000 |
No
Grade
MarkSAE J429
Grade 4StudsMedium Carbon Cold Drawn Steel1/4 thru 1-1/2--100,000 |
115,000 |
B5ASTM A193
Grade B5AISI 501 |
1/4 Thru 4-- |
80,000 |
100,000 |
B6ASTM A193
Grade B6AISI 41085,000 |
110,000 |
B7ASTM A193
Grade B7AISI 4140, 4142, OR 4105 |
1/4 thru 2-1/2
Over 2-1/2 thru 4
Over 4 thru 7--
--
-- |
105,000
95,000
75,000 |
125,000
115,000
100,000 |
B16ASTM A193
Grade B16CrMoVa Alloy Steel105,000
95,000
85,000 |
125,000
115,000
100,000 |
B8ASTM A193
Grade B8AISI 304 |
1/4 and larger--30,000 |
75,000 |
B8CASTM A193
Grade B8C |
AISI 347 |
B8MASTM A193
Grade B8M |
AISI 316 |
B8TASTM A193
Grade B8T |
Bolts,
Screws,
Studs for High-Temperature Service |
AISI 3211/4 and larger--30,000 |
75,000 |
B8ASTM A193
Grade B8AISI 304
Strain Hardened |
1/4 thr 3/4
Over 3/4 thru 1
Over 1 thru 1-1/4
Over 1-1/4 thru 1-1/2--
--
--
-- |
100,000
80,000
65,000
50,000 |
125,000
115,000
105,000
100,000 |
B8CASTM A193
Grade B8C |
AISI 347
Strain Hardened |
B8MASTM A193
Grade B8MAISI 316
Strain Hardened95,000
80,000
65,000
50,000 |
110,000
100,000
95,000
90,000 |
B8TASTM A193
Grade B8TAISI 321
Strain Hardened100,000
80,000
65,000
50,000 |
125,000
115,000
105,000
100,000 |
L7ASTM A320
Grade L7 |
Bolts,
Screws,
Studs for Low-Temperature Service |
AISI 4140,
4142 or 4145 |
1/4 thru 2-1/2 --105,000 |
125,000 |
L7AASTM A320
Grade L7A |
AISI 4037 |
L7BASTM A320
Grade L7B |
AISI 4137 |
L7CASTM A320
Grade LC7 |
AISI 8740 |
L43ASTM A320
Grade L43AISI 43401/4 thru 4--105,000 |
125,000 |
B8ASTM A320
Grade B8 |
Bolts,
Screws,
Studs for Low-Temperature Service |
AISI 304 |
1/4 and larger--30,000 |
75,000 |
B8CASTM A320
Grade B8C |
AISI 347 |
B8TASTM A320
Grade B8T |
AISI 321 |
B8FASTM A320
Grade B8F |
AISI 303
or 303Se |
B8MASTM A320
Grade B8M |
AISI 316 |
B8ASTM A320
Grade B8AISI 304 |
1/4 thru 3/4
Over 3/4 thru 1
Over 1 thru 1-1/4
Over 1-1/4 thru 1-1/2--
--
--
--100,000
80,000
65,00
50,00 |
100,000
80,000
65,00
50,00 |
B8CASTM A320
Grade B8C |
AISI 347 |
B8FASTM A320
Grade B8F |
AISI 303
or 303Se |
B8MASTM A320
Grade B8M |
AISI 316 |
B8TASTM A320
Grade B8T |
AISI 321 |
 |
SAE J429
Grade 5 |
Bolts,
Screws,
StudsMedium Carbon Steel, Quenched and Tempered |
1/4 thru 1
Over 1 to 1-1/285,000
74,00092,000
81,000 |
120,000
105,000 |
ASTM A4491/4 thru 1
Over 1 to 1-1/2
Over 1-1/2 thru 385,000
74,000
55,00092,000
81,000
58,000 |
120,000
105,000
90,000 |
 SAE J429
Grade 5.1SemsLow or Medium Carbon Steel, Quenched and TemperedNo. 6
thru 3/885,000-- |
120,000 |
 SAE J429
Grade 5.2Bolts,
Screws,
StudsLow Carbon Martensitic Steel, Quenched and Tempered1/4 thru 185,00092,000 |
120,000 |
A325ASTM A325
Type 1 |
High Strength
Structural Bolts |
Medium Carbon Steel, Quenched and Tempered1/2 thru 1
1-1/8 thru 1-1/285,000
74,00092,000
81,000 |
120,000
105,000 |
A325ASTM A325
Type 2Low Carbon Martensitic Steel, Quenched and Tempered1/2 thru 185,00092,000 |
120,000 |
A325ASTM A325
Type 3Atmospheric Corrosion Resisting Steel, Quenched and Tempered1/2 thru 1
1-1/8 thru 1-1/285,000
74,00092,000
81,000 |
120,000
105,000 |
BBASTM A354
Grade BB |
Bolts,
StudsAlloy Steel, Quenched and Tempered1/4 thru 2-1/2
2-3/4 thru 4 |
80,000
75,00083,000
78,000 |
105,000
100,000 |
BCASTM A354
Grade BC105,000
95,000109,000
99,000 |
125,000
115,000 |
 SAE J429
Grade 7Bolts,
Screws,Medium Carbon Alloy Steel, Quenched and Tempered41/4 thru 1-1/2105,000115,000 |
133,000 |
 |
SAE J429
Grade 8 |
Bolts,
Screws,
Studs |
Medium Carbon Alloy Steel, Quenched and Tempered |
1/4 thru 1-1/2120,000130,000 |
150,000 |
ASTM A354
Grade BD |
Alloy Steel, Quenched and Tempered 4 |
No Grade
MarkSAE J429
Grade 8.1StudsMedium Carbon Alloy or SAE 1041 Modified Elevated Temperature Drawn Steel1/4 thru 1-1/2120,000130,000 |
150,000 |
A490ASTM A490High Strength Structural BoltsAlloy Steel, Quenched and Tempered1/2 thru 1-1/2120,000130,000 |
150,000 min
170,000 max |
No Grade
MarkISO R898
Class 4.6 |
Bolts,
Screws,
Studs |
Medium Carbon Steel, Quenched and Tempered |
All Sizes
thru 1-1/2 |
33,00036,000 |
60,000 |
No Grade
MarkISO R898
Class 5.855,00057,000 |
74,000 |
8.8
or
88ISO R898
Class 8.8 |
Alloy Steel, Quenched and Tempered |
85,00092,000 |
120,000 |
10.9
or
109ISO R898
Class 10.9120,000130,000 |
150,000 |
FASTENER IDENTIFICATION MARKING
Grade
Identification
MarkingSpecificationMaterialNominal Size
In.Proof
Load
Stress
ksi |
Hardness
Rockwell |
See
Note |
| Min |
Max |
No Mark |
ASTM A563 - Grade 0Carbon Steel1/4 thru 1-1/269B55C32 |
3,4 |
| ASTM A563 - Grade ACarbon Steel1/4 thru 1-1/290B68C32 |
3,4 |
| ASTM A563 - Grade BCarbon Steel |
1/4 thru 1120 |
B69C32 |
3,4 |
| over 1 thru 1-1/2 |
105 |
 ASTM A563 - Grade CCarbon Steel
May be Quenched
and Tampered1/4 thru 4144B78C38 |
5 |
 ASTM A563 - Grade C3Atmospheric
Corrosion
Resistant Steel
May be Quenched
and Tampered1/4 thru 4144B78C38 |
5,9 |
 ASTM A563 - Grade DCarbon Steel
May be Quenched
and Tampered1/4 thru 4150B84C38 |
6 |
 ASTM A563 - Grade DHCarbon Steel
Quenched
and Tampered1/4 thru 4175C24C38 |
6 |
 ASTM A563 - Grade DH3Atmospheric
Corrosion
Resistant Steel,
Quenched
and Tampered1/4 thru 4175C24C38 |
5,9 |
 ASTM A194 - Grade 1Carbon Steel1/4 thru 4130B70-- |
7 |
 ASTM A194 - Grade 2Medium Carbon
Steel1/4 thru 4150159352 |
7,8 |
 ASTM A194 - Grade 2HMedium Carbon
Steel, Quenched
and Tempered1/4 thru 4175C24C38 |
7 |
 ASTM A194 - Grade 2HMMedium Carbon
Steel, Quenched
and Tempered1/4 thru 4150159237 |
7,8 |
 ASTM A194 - Grade 4Medium Carbon
Alloy Steel,
Quenched
and Tempered1/4 thru 4175C24C38 |
7 |
 ASTM A194 - Grade 7Medium Carbon
Alloy Steel,
Quenched
and Tempered1/4 thru 4175C24C38 |
7 |
 ASTM A194 - Grade 7MMedium Carbon
Alloy Steel,
Quenched
and Tempered1/4 thru 4150159237 |
7 |
| See Note 1,2 |
10 |
|
NOTES:
- In addition to the indicated grade marking, all grades, except A563 grades O, A and B, must be marked for manufacturer identification.The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. When nuts are machined from bar stock the nut must be additionally marked with the letter 'B'.Nuts are not required to be marked unless specified by the purchaser. When marked, the identification marking shall be the grade letter O, A or B.Properties shown are those of nonplated or noncoated coarse thread hex nuts.Properties shown are those of coarse thread heavy hex nuts.Properties shown are those of coarse thread heavy hex nuts.Properties shown are those of coarse 8-pitch thread heavy hex nuts.Hardnesses are Brinell Hardness Numbers.The nut manufacturer, at his option, may add other markings to indicate the use of atmospheric corrosion resistant steel.
- Specifications --
ASTM A563 -- Carbon and Alloy Steel Nuts.
ASTM A194/A194M -- Carbon and Alloy Steel Nuts for Bolts for High Pressure and High Temperature Service
MECHANICAL REQUIREMENTS FOR STAINLESS STEEL FASTENERS
| Grade(1) |
General
Descpription
of Material |
Bolts, Screws and Studs |
Nuts |
Full Size Bolts,
Screws, Studs |
Machine Test Sprecimens of
Bolts, Screws, Studs |
Hardness
RockwellProof
Load
Stress |
Hardness
Rockwell |
Yield (2)
StrengthTensile
StrengthYield (2)
StrengthTensile
Strength |
Elong-
ation(3) |
| Min psiMin psiMin psiMin psi% Min.Minpsi |
Min |
303AAustenitic
Stainless Steel-
Sol. Annealed |
30,00075,00030,00075,00020B7575,000 |
B75 |
304-AAustenitic
Stainless Steel-
Sol. Annealed |
30,00075,00030,00075,00020B7575,000 |
B75 |
304Austenitic
Stainless Steel-
Cold Worked |
50,00090,00045,00085,00020B8590,000 |
B85 |
304-SHAustenitic
Stainless Steel-
Strain HardenedSee
Note 6See
Note 6See
Note 6See
Note 6 |
15C25 |
See
Note 6 |
C20 |
305-AAustenitic
Stainless Steel-
Sol. Annealed |
30,00075,00030,00075,00020B7075,000 |
B70 |
305Austenitic
Stainless Steel-
Cold Worked |
50,00090,00045,00085,00020B8590,000 |
B85 |
305-SHAustenitic
Stainless Steel-
Strain HardenedSee
Note 6See
Note 6See
Note 6See
Note 6 |
15C25 |
See
Note 6 |
C20 |
316-AAustenitic
Stainless Steel-
Sol. Annealed |
30,00075,00030,00075,00020B7075,000 |
B70 |
316Austenitic
Stainless Steel-
Cold Worked |
50,00090,00045,00085,00020B8590,000 |
B85 |
316-SHAustenitic
Stainless Steel-
Strain HardenedSee
Note 6See
Note 6See
Note 6See
Note 6 |
15C25 |
See
Note 6 |
C20 |
XM7-AAustenitic
Stainless Steel-
Sol. Annealed |
30,00075,00030,00075,00020B7075,000 |
B70 |
XM7Austenitic
Stainless Steel-
Cold Worked |
50,00090,00045,00085,00020B8590,000 |
B85 |
384-AAustenitic
Stainless Steel-
Sol. Annealed |
30,00075,00030,00075,00020B7075,000 |
B70 |
384Austenitic
Stainless Steel-
Cold Worked |
50,00090,00045,00085,00020B8590,000 |
B85 |
410-HMartensitic
Stainless Steel-
Hardened and
Tempered |
95,000125,00095,000125,00020C22125,000 |
C22 |
410-HTMartensitic
Stainless Steel-
Hardened and
Tempered |
135,000180,000135,000180,00012C36180,000 |
C36 |
416-HMartensitic
Stainless Steel-
Hardened and
Tempered |
95,000125,00095,000125,00020C22125,000 |
C22 |
416-HTMartensitic
Stainless Steel-
Hardened and
Tempered |
135,000180,000135,000180,00012C36180,000 |
C36 |
430Ferritic
Stainless Steel |
40,00070,00040,00070,00020B7570,000 |
B75 |
Note 6. Austenitic stainless steel, strain hardened bolts, screws, studs, and nuts shall have the following strength per properties.
Product
Size |
Bolts, Screws, Studs |
Nuts |
| Tested Full SizeMachine Test Specimens, |
Proof
Load
Stress |
Yield
StrengthTensile
StrengthYield
Strength |
Tensile
Strength |
| in.min psimin psimin psimin psi |
psi |
| to 5/8 in. |
100,000125,00090,000115,000 |
125,000 |
| over 5/8 to 1 in. |
70,000105,00065,000100,000 |
105,000 |
| over 1 to 1-1/2 in. |
50,00090,00045,00085,000 |
90,000 |
|
