Kobelco Steel & Alloys

Studs/Bolts/Nuts

Studs/Bolts/Nuts Exporter

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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--		--	60,000
	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	1/4 Thru 4--	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	1/4 thru 2-1/2 Over 2-1/2 thru 4 Over 4 thru 7-- -- --	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			100,000 80,000 65,000 50,000	125,000 115,000 105,000 100,000	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	Bolts, Screws, Studs	Alloy Steel, Quenched and Tempered 4	1/4 thru 1-1/2120,000130,000	150,000
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		Medium Carbon Steel, Quenched and Tempered		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		Alloy Steel, Quenched and Tempered		150,000

FASTENER IDENTIFICATION MARKING

Grade Identification MarkingSpecificationMaterialNominal Size In.Proof Load Stress ksi	Hardness Rockwell		See Note
	Min	Max	See Note
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
	ASTM A563 - Grade BCarbon Steel	over 1 thru 1-1/2	B69C32	3,4	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)		Hardness RockwellProof Load Stress	Hardness Rockwell
		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	Proof Load Stress
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

Studs/Bolts/Nuts

Studs/Bolts/Nuts Exporter

Contact Us For High Quality Studs/Bolts/Nuts

HEAT-TREATED ALLOY STUDS, BOLTS THREADED BARS & RODS

ASTM, SAE AND ISO GRADE MARKINGS AND MECHANICAL PROPERTIES FOR STEEL FASTENERS

FASTENER IDENTIFICATION MARKING

MECHANICAL REQUIREMENTS FOR STAINLESS STEEL FASTENERS

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