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ASTM A194 GR 8M

Home 9 FASTENERS 9 STAINLESS STEEL 9 ASTM A194 GR 8M
ASTM A194 GR 8M

Product Specification

Chemical Composition

Mechanical Composition

Equivalent Grades

ASTM A194 Grade 8M Bolt, Nuts, Washers Manufacturer in India

ASTM A194 Grade 8M, ASTM A194 Grade 8M Bolt, Nuts, ASTM A194 Bolt Manufacturer in India 

Detailed Information:

As a leading manufacturer and exporter of ASTM A194 Grade 8M Stainless Steel Hex Nuts, RatnaExporter.com provides features such as non-corrosive, accurate dimensions, lightweight, long-life features, sturdy design, and easy handling.

ASTM A194 covers various bolts from carbon steel, alloy steel, and stainless steel, including the ASTM A194 Grade 8M Nuts. The SA194 Grade 8M Heavy Hex Nuts indicates that this alloy is an austenitic grade alloy, whereas the ASTM A194 specification covers martensitic and austenitic stainless steel nuts.

The stainless steel used to make A194 Grade 8M Heavy Hex Nuts is austenitic alloy 316. Regarding classes, A194 Grade 8M Nut Material is categorized into two subclasses: class 1 is a carbide solution-treated fastener, and class 2 is a strain-hardened fastener. It is intended for high-pressure or/and high-temperature applications that these specified A194 Grade 8M Hex Nuts are both carbide solution treated and strain hardened. 

The material, in this case, marine grade stainless steel, i.e., Asme Sa194 Grade 8M nut, may be processed. Centerless grinding or cold drawing processes process A194 Gr 8M nuts. The Austenitic stainless steel grades can be solution annealed or annealed and strain-hardened. Furthermore, A194 Gr 8m Material must pass hardness, load-proof, and cone-proof tests.

ASTM A194 Grade 8m Nuts Specification

Standards Designation
ASTM A194 Grade 8M: Stainless AISI 316 Heavy Hex Nuts.
Dimensions ASME B18.2.1, B18.3
Threads Configuration ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads
Certification Dual Certified As per ASTM & ASME Codes
Additional Certifications PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Mandatory Requirements Free from Mercury & Radioactive Contamination
Melt Origin South America/East Europe/JapanKorea/
Product Origin Made in India
Additional Requirements NACE MR0103 / MR0175 / ISO 15156 Compliance

 

Standards Designation
ASTM A194 Grade 8M: Stainless AISI 316 Heavy Hex Nuts.

 

ASTM A194 Gr 8M Nuts Chemical Composition

ASTM

A194 Grade 8

Percentage

%

C.

0.08M %

Mn.

2.00 %

Si.

1.00 %

P.

0.05 

S.

0.03 

Cr.

16-18

Ni.

10-14

Mo.

2.3

A194 Gr 8M Nuts Mechanical Behaviour

B scale

C scale

Hardness – (BHN)

60 min

32 max

8M 126-300

Dimension of A194 Grade 8M Nuts

Nominal Size or Basic Major Thread Diameter F G H

Width

Across Flats

Width

Across Corners

 Thickness
Basic Max Min Max Min Basic Max Min
5/8 .6250 15/16 .938 .922 1.083 1.051 35/64 .559 .535
5/16 .3125 1/2 .500 .489 .577 .557 17/64 .273 .258
3/8 .3750 9/16 .562 .551 .650 .628 21/64 .337 .479
7/16 .4375 11/16 .688 .675 .794 .768 3/8 .385 .365
1/2 .5000 3/4 .750 .736 .866 .840 7/16 .448 .427
1/4 .2500 7/16 .438 .428 .505 .488 7/32 .226 .212
9/16 .5625 7/8 .875 .861 1.010 .982 31/64 .496 .473
2-1/2 2.5000 3-3/4 3.750 3.625 4.330 4.133 2-5/32 2.209 2.105
3/4 .7500 1-1/8 1.125 1.088 1.299 1.240 41/64 .665 .617
7/8 .8750 1-5/16 1.312 1.269 1.516 1.447 3/4 .776 .724
1 1.0000 1-1/2 1.500 1.450 1.732 1.653 55/64 .887 .831
1-1/8 1.1250 1-11/16 1.688 1.631 1.949 1.859 31/32 .999 .939
1-3/8 1.3750 2-1/16 2.062 1.994 2.382 2.273 1-11/64 1.206 1.138
1-1/2 1.500 2-1/4 2.250 2.175 2.598 2.480 1-9/32 1. ASTM A194 GR. 8 1.245
1-5/8 1.6250 2-7/16 2.438 2.356 2.815 2.686 1-25/64 1.429 1.353
1-3/4 1.7500 2-5/8 2.625 2.538 3.031 2.893 1-1/2 1.540 1.460
2 2.0000 3 3.000 2.900 3.464 3.306 1-23/32 1.763 1.675
2-1/4 2.2500 3-3/8 3.375 3.263 3.897 3.719 1-15/16 1.986 1.890
2-3/4 2.7500 4-1/8 4.125 3.988 4.763 4.546 2-3/8 2.431 2.319

 

ASTM A194 Grade 8M Nuts Dimension table

Nominal Size or Basic Major Thread Diameter

F

G

H

Width Across Flats

Width Across Corners

Thickness

Basic

Max

Min

Max

Min

Basic

Max

Min

3

3.0000

4-5/8

4.625

4.475

5.340

5.102

2-61/64

3.013

2.893

1/4

.2500

1/2

.500

.488

.577

.556

15/64

.250

.218

3/8

.3750

11/16

.688

.669

.794

.763

23/64

.377

.341

7/16

.4375

3/4

.750

.728

.866

.830

27/64

.441

.403

5/16

.3125

9/16

.562

.546

.650

.622

19/64

.314

.280

1/2

.5000

7/8

.875

.850

1.010

.969

31/64

.504

.464

9/16

.5625

15/16

.938

.909

1.083

1.037

35/64

.568

.526

5/8

.6250

1-1/16

1.062

1.031

1.227

1.175

39/64

.631

.587

3/4

.7500

1-1/4

1.250

1.212

1.443

1.382

47/64

.758

.710

7/8

.8750

1-7/16

1.438

1.394

1.660

1.589

55/64

.885

.833

1

1.0000

1-5/8

1.325

1.575

1.876

1.796

63/64

1.012

.956

1-1/8

1.1250

1-13/16

1.812

1.756

2.093

2.002

1-7/64

1.139

1.079

1-1/4

1.2500

2

2.000

1.938

2.309

2.209

1-7/32

1.251

1.187

1-3/8

1.3750

2-3/16

2.188

2.119

2.526

2.416

1-11/32

1.378

1.460

1-1/2

1.5000

2-3/8

2.375

2.300

2.742

2.622

1-15/32

1.505

1.433

1-5/8

1.6250

2-9/16

2.562

2.481

2.959

2.828

1-19/32

1.632

1.556

1-3/4

1.7500

2-3/4

2.750

2.662

3.175

3.035

1-23/32

1.759

1.679

2

2.0000

3-1/8

3.125

3.025

3.608

3.449

1-31/32

2.013

1.925

2-1/4

2.2500

3-1/2

3.500

3.388

4.041

3.862

2-13/64

2.251

2.155

2-1/2

2.5000

3-7/8

3.875

3.750

4.474

4.275

2-29/64

2.505

2.401

2-3/4

2.7500

4-1/4

4.250

4.112

4.907

4.688

2-45/64

2.759

2.647

3-1/4

3.2500

5

5.000

4.838

5.774

5.515

3-3/16

3.252

3.124

3-1/2

3.5000

5-3/8

5.375

5.200

6.207

5.928

3-7/16

3.506

3.370

3-3/4

3.7500

5-3/4

5.750

5.562

6.640

6.341

3-11/16

3.670

3.616

4

4.0000

6-1/8

6.125

5.925

7.073

6.755

3-15/16

4.014

3.862

 

ASTM A194 Grade 8m Nuts Size Chart

Nut Size

(mm)

Diameter*

(mm)

Height

(mm)

Hex Nut

Jam Nut

Nylock Nut

4

7

3.2

2.2

5

2

4

1.6

1.2

–

2.5

5

2

1.6

–

3

5.5

2.4

1.8

4

5

8

4

2.7

5

6

10

5

3.2

6

7

11

5.5

3.5

–

8

13

6.5

4

8

10

17

8

5

10

14

22

11

7

14

16

24

13

8

16

18

27

15

9

18.5

12

19

10

6

12

20

30

16

10

20

This is the diameter of the flats, as well as the size of the wrench.

Application of A194 Grade 8M Fasteners

  •  The A194 Grade 8M Washer is used in seawater equipment
  •  Nuts A194 Gr 8M used in petrochemicals
  •  Pharmaceutical Equipment uses A194 Grade 8M Nuts
  •  Hex nuts made of stainless steel A194 are used in heat exchangers
  •  Stud nuts SA194 Grade 8M are used in specialty chemicals
  •  Nuts in ASTM A194 Grade 8M are used in aircraft exhaust manifolds
  •  The SA194 Grade 8M Flat Washer is used in offshore oil drilling
  •  Nuts conforming to ASTM A194 are used in spiral welded tubes for burner pipes and flues
  •  Nuts of ASME SA194 Grade 8M are used in power generation
  •  In pharmaceuticals, ASTM A194 Grade 8M fasteners are used
  •  The use of A194 Grade 8M Heavy Hex Nuts in the gas processing industry

ASTM A194 Grade 8M Nuts Certificates

Test Certificates (TCs) from RatnaExporter.com comply with EN 10204/3.1B and are available as Raw Materials Certificates, Radiography Test Reports, and Third Party Inspection Reports. FERRITE CONTENT as per norms if clients request it in addition to standard certificates. We also provide NACE MR 01075.

  • EN 10204/3.1B,
  • Raw Materials Certificate
  • 100% Radiography Test Report
  • Third-Party Inspection Report, etc

ASTM A194 Grade 8m Nuts Value Added Services

Material Testing:

 At RatnaExports.com ensure that all our materials go through strict quality tests before dispatching them to our clients.

    • Tensile testing of areas is an example of mechanical testing
    • Test of hardness
    • Analysis of Chemical Compounds by Spectroscopy
    • Testing for Positive Material Identification (PMI)
    • The flattening test
    • Testing on a micro and macro scale
    • Testing for Pitting Resistance
    • Test for flares
    • Test for intergranular corrosion (IGC)
  • Documentation
    • HS Code is included on commercial invoices
    • Including net weight and gross weight, number of boxes, marks, and numbers
    • Embassy or Chamber of Commerce legalization/attestation of the Certificate of Origin
    • Obtaining a Fumigation Certificate
    • Test reports for raw materials
    • Traceability records for materials
    • Plan for Quality Assurance (QAP)
    • Charts for heat treatment
    • Certificates certifying NACE MR0103 and NACE MR0175
    • Certifications of Material Test (MTC) following EN 10204 3.1 and EN 10204 3.2
    • A letter of guarantee
    • Laboratory Test Reports Approved by NABL
    • Specifications/qualifications for welding procedures, WPS/PQR
    • For the Generalized System of Preferences (GSP), fill out Form A

ASTM A194 Grade 8M Nuts Packaging

Various industries, including petrochemicals, oil, gas, power generation, bulk liquid transportation, chemicals, pharmaceuticals, pulp and paper manufacture, textiles, etc., use the ASTM A194 Grade 2h Nut. The ASTM A194 Grade 8M nuts we manufacture are packaged in wooden cases to prevent damage during transportation. Standard export packaging is also done in wooden cases for exports. It is possible to mark ASTM A194 Grade 8M Nuts with grades, lot numbers, sizes, degrees, and our trademark. Custom markings with our brand are also available on special request.

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