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Studs/Bolts/Nuts :

Studs/Bolts/Nuts Exporter

Contact Us For High Quality Studs/Bolts/Nuts

At JB Steel we pride ourselves on always putting the customer first. We help make stainless solutions simple for you by ensuring satisfaction through high delivery performance, flexibility and extensive service.

We are pleased to introduce ourselves as one of the leading Importers, Exporters, Suppliers & Stockists of Studs/Bolts/Nuts.

We would appreciate to get your esteemed enquires and look forward to the pleasure receiving your valuable response.

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:

  1. 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.
  2. 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


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