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ASTM A193 /A320 Gr B8.B8m Class 1&2

Home 9 FASTENERS 9 STAINLESS STEEL 9 ASTM A193 /A320 GR B8.B8M CLASS 1&2
ASTM A193 /A320 GR B8.B8M CLASS 1&2

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Alloy Steel B16 Nuts, B16 Alloy Steel Bolt, Alloy Steel B16 Dome Nuts, ASTM A193 Alloy Steel Nut, B16 Alloy Steel Shoulder Nuts Suppliers And Exporters In World Wide.

Detailed Information:

Our company, RatnaExports.com, manufactures screws, nuts, and stud bolts in stainless steel A193 B8M and A320 B8M, NI-Cr austenitic stainless steel. They are hardened through cooling and warping, providing better corrosion resistance than type 304 concerning pitting caused by chloride ions.

A193 B8M and A320 B8M are two materials commonly used as components in equipment used in the chemical, pharmaceutical, photographic, food, textile, and paper industries, as well as parts of furnaces, heat exchangers, and orthopedics.

In terms of corrosion resistance, steel is excellent in the atmosphere and has a large variety of salts, organic acids, and food substances; it is pretty good regarding poor solutions of reducing acids, and it has an improved corrosion resistance compared to other austenitic steels without Mo, halides, and seawater.

Because type 316 has a relatively low carbon content, it is slightly susceptible to intercrystalline corrosion. In any case, it is recommended to avoid slow heating and cooling between 450°C and 900°C.

During current “on-order” conditions, the heat oxidation resistance of A193 B8M and A320 B8M is up to 850°C, and in fitful “on-order” conditions, it can withstand up to 800°C. It can be welded without any particular problems. When electrodes are required, you must use electrodes made from the same type of steel.

The ASTM A193 Grade B8M is a standard material specification for high-strength 316/316L stainless steel bolts, screws, studs, or other external threaded fasteners for high-temperature, high-pressure service, as well as other special applications.

There are two types of tensile classes that A193 Grade B8M is classified into, namely class 1 and class 2, although, in terms of chemical composition, it is equivalent to AISI 316/316L stainless steel with improved strength.

High-strength pipeline bolts are used. A193 Grade B8M class 1 bolts are carbide solution treated with a maximum tensile strength requirement of 75 ksi or 515 MPa, yield 30 ksi or 205 MPa, and maximum hardness of 223 HBW. The B8M class 2 bolts are carbide solution treated, and strain hardened to achieve higher tensile strength requirements of 110 ksi or 760 MPa, 95 ksi or 655 MPa, and maximum hardness of 321 HBW or 35HRC.

For high-temperature, high-pressure service, and other special-purpose applications, ASTM A193 Grade B8M is the standard material specification for high tensile 316/316L stainless steel bolts, screws, studs, or other externally threaded fasteners that are intended for use in high-temperature, high-pressure environments.

For corrosion-resistant 316 stainless steel fasteners, such as bolts, screws, studs, threaded rods, and other externally threaded parts such as pressure piping and pressure vessels bolting ASTM A193 Grade B8M Class 1 is a standard material specification. The bolts are used in high tensile, high temperature, and special purpose applications such as pressure piping and pressure vessel bolting. 

There are three grades of B8M stainless steel: 316 stainless steel with a minimum tensile strength of 75 ksi, a yield strength of 30 ksi, and a maximum hardness requirement of 223 HBW or 96 HRB. For Grade B8M Class 1 Fasteners, this specification outlines the requirements for chemical composition, mechanical properties, hardness, heat treatment, and recommended nuts-washers.

Astm A193 /A320 Gr B8.B8m Clas 1&2 Of Specifications

 

A320 Grade B8M Threads: METRIC, BSW, BSF, UNC, UNF, or as required
Standard: DIN 933, DIN 931, ANSI, JIS standards
A320 Grade B8M Fasteners In the Form of: Hex
Square
Round
Threading as per Gauge Etc.
Head drive: Phillips, Slotted, Phillips/Slot, Six-Lobe, etc
A320 Grade B8M Packing: IN BULK: canton/pallet, Small Boxs/carton/ pallet, or customer request
A320 Grade B8M Test Certificate: Manufacturer Test Certificate as per EN 10204 / 3.1
Property Class: For Bolts & Screws: A2-70, A2-80, A4-70, A4-80, F593C, F593D, F593G, F593H
For Nuts: A2-70, A2-80, A4-70, A4-80, F594C, F594D, F594G, F594H, A2-035, A4-040
For SHCS: F837B, F837C, F837E, F837
For Threaded Rods: A2-70, A2-80, A4-70, A4-80, F593C, F593D, F593G, F593H, B8, B8M CL1 & CL2
A320 Grade B8M Finish: Passivated
A320 Grade B8M Origin and service region: European
The origin of 304 Stainless Steel Nuts is Western European. However, projects with eastern origin are possible on request.
Stainless Steel Grades: AISI 304, AISI 304L, AISI 316, AISI 316L, AISI 309, AISI 310, AISI 317L, AISI 321, AISI 317, AISI 309, AISI 410, AISI 422, AISI 430, AISI 431, AISI 303 , AISI 202 fasteners Etc.
Surface Coating: Hot Dipped Galvanizing Fasteners
Phosphate Fasteners
Teflon Fasteners
PTFE Coated Fasteners
Xylon Fasteners
Zinc Fasteners
Cadmium Fasteners

Astm A193 /A320 Gr B8.B8m Clas 1&2 Of Chemical Composition

 

C

S

P

Si

Mn

Cr

Ni

N

Mo

0.08

0.030

0.045

1.00

2.00

18-20

8-11

 

C

S

P

Si

Mn

Cr

Ni

N

0.08

0.03

0.045

1.00

2.00

6

10-14

Astm A193 /A320 Gr B8.B8m Class &2 Mechanical Properties

 

Grade Size Tensile ksi, minimum Yield, ksi, minimum Elong, %, minimum RA % minimum HBW HRC
ASTM A193  B8M Class 1 All 75 30 30 50 223 maximum 96 maximum
ASTM A193  B8M Class 2  Up to 3/4 110 95 15 45 321 maximum 35 maximum
7/8 – 1 100 80 20 45
1-1/8 – 1-1/4 95 65 25 45
1-3/8 – 1-1/2 90 50 30 45

 

Astm A193 /A320 Gr B8.B8m Class 1&2 Temperature Range

 

SPECIFICATION

GRADE

Degree F (deg C)

 

 

650

700

750

800

850

900

950

1000

1050

1100

 

 

343

371

399

427

454

482

510

538

566

593

ASTM A193

B6

21.2

21.2

21.2

19.5

15.6

12

 

 

 

 

ASTM A193

B7(*)

 

 

 

 

 

 

 

 

 

 

ASTM A193

B7M

25

25

23.6

21

17

12.5

8.5

4.5

 

 

ASTM A193

(*)

20

20

20

18.5

16.2

12.5

8.5

4.5

 

 

ASTM A193

B8-CL1

11.2

11

10.8

10.5

10.3

10.1

9.9

 

 

 

ASTM A193

B8-CL2

25

 

 

 

 

 

 

 

 

 

ASTM A193

(* *)

25

25

25

25

23.5

20.5

16

11

6.3

2.8

ASTM A193

B16

 

 

 

 

 

 

 

 

 

 

ASTM A320

L7

25

25

 

 

 

 

 

 

 

 

BS

B17B

20

19.8

19.8

19.8

19.7

19.7

19.6

19.4

19.3

16.6

ASTM 453

660

20.2

20.1

20

19.9

19.9

19.9

19.8

19.8

What is B8 Class 1?

As the name suggests, ASTM A193 Grade B8 Class 1 is a standard material specification for corrosion-resistant austenitic stainless steel fasteners used in high tension, high temperature, and special purpose applications such as pressure piping and pressure vessel bolting.

What is the difference between B8M Class 1 and Class 2?

The Grade B8M Class 1 fasteners require a carbide solution treatment to increase their strength and reduce their galling susceptibility. The Grade B8M Class 2 pins need an additional strain hardening operation to increase their power and to reduce their vulnerability to galling; they are marked “B8MSH” with the grade symbol underlined.

What is B8 using a class?

Class B8 (Storage or distribution) uses warehousing and open-air storage. Class B8 can benefit from permitted development opportunities to change the use of a resource without having to submit a complete planning application.

What Is The Difference Between A193 Grade B8 And A320 Grade B8?

There is no difference in the specifications between the two bolts. In order identically, the two specifies written in tandem. The only difference is the intended application of the two bolts. Bolts of type A193 are designed for use at high temperatures and under high pressures, while type A320 is intended for use in cold temperatures. Stainless steel type 304 is used in both bolt grades, and they have mechanical and chemical requirements that are the same, as well as the same markings on their heads. It would be impossible to tell which bolt is which if you held one in each hand.

Other product range of A320 Grade B8M

A320 Grade B8M Nuts

A320 Grade B8M Hex Slotted Nuts

A320 Grade B8M Bolts

A320 Grade B8M Heavy Hex Nuts

A320 Grade B8M screws

A320 Grade B8M Heavy Hex Jam Nuts

A320 Grade B8M washers

A320 Grade B8M Heavy Hex Slotted Nuts

A320 Grade B8M Heavy Hex Bolts

A320 Grade B8M Hex Coupling Nuts

A320 Grade B8M Finished Hex Bolts

A320 Grade B8M Cap Nuts

A320 Grade B8M Oval Neck Track Bolts

A320 Grade B8M 12-Point Nuts

A320 Grade B8M Bent Bolts

A320 Grade B8M Flat Washers

A320 Grade B8M Hex Cap Screws

A320 Grade B8M Lock Washers

A320 Grade B8M Heavy Hex Screws

A320 Grade B8M Beveled Washers

A320 Grade B8M 12-Point Screws

A320 Grade B8M Threaded Rod

A320 Grade B8M Socket Head Cap Screws

A320 Grade B8M Stud Bolts

A320 Grade B8M Socket Head Shoulder Screws

A320 Grade B8M Continuous Thread Studs

A320 Grade B8M Socket Set Screws

A320 Grade B8M Double-End Studs

A320 Grade B8M Flat Countersunk Head Cap Screws

A320 Grade B8M Tap End Studs

A320 Grade B8M Hex Nuts

A320 Grade B8M Threaded Taper Pins

A320 Grade B8M Hex Jam Nuts

A320 Grade B8M Heavy Square Nuts

 

Countries We Export:

Afghanistan, Albania, Algeria, Andorra, Angola, Antigua-Barbuda Argentina, Armenia, Australia, Austria, Azerbaijan, Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bhutan, Bolivia, Bosnia-Herzegovina, Botswana, Brazil, Brunei, Bulgaria, Burkina-Faso, Burundi, Côte d’Ivoire, Cabo Verde, Cambodia, Cameroon, Canada, Central African Republic, Chad, Chile, China, Colombia, Comoros, Congo (Congo-Brazzaville), Costa-Rica, Croatia, Cuba, Cyprus, Czechia (Czech Republic), Democratic Republic of the Congo, Denmark, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Eswatini (fmr. “Swaziland”), Ethiopia, Fiji, Finland, France, Gabon, Gambia, Georgia, Germany, Ghana, Greece, Grenada, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Holy See, Honduras, Hungary, Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel, Italy, Jamaica, Japan, Jordan, Kazakhstan, Kenya, Kiribati, Kuwait, Kyrgyzstan, Laos, Latvia, Lebanon, Lesotho, Liberia, Libya, Liechtenstein, Lithuania, Luxembourg, Madagascar, Malawi, Malaysia, Maldives, Mali, Malta, Marshall Islands, Mauritania, Mauritius, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Morocco, Mozambique, Myanmar (formerly Burma), Namibia, Nauru, Nepal, Netherlands, New Zealand, Nicaragua, North Korea, North Macedonia, Norway, Oman, Pakistan, Palau, Palestine-State, Panama, Papua, New Guinea, Paraguay, Peru, Philippines, Poland, Portugal, Qatar, Romania, Russia, Rwanda, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Samoa, San Marino, Sao Tome and Principe, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, South Korea, South Sudan, Spain, Sri Lanka, Sudan, Suriname, Sweden, Switzerland, Syria, Tajikistan, Tanzania, Thailand, Timor-Leste, Togo, Tonga, Trinidad and Tobago, Tunisia, Turkey, Turkmenistan, Tuvalu, Uganda, Ukraine, United Arab Emirates, United Kingdom, United States of America, Uruguay, Uzbekistan, Vanuatu, Venezuela, Vietnam, Yemen, Zambia, Zimbabwe.

Cities We Supply:

London, New-York, Paris, Moscow, Tokyo, Dubai, Singapore, Barcelona, Los-Angeles, Madrid Rome, Chicago, Toronto, San-Francisco, Abu-Dhabi, St-Petersburg, Amsterdam, Berlin Prague, Washington,Istanbul, Las-Vegas, Doha, Seoul, Sydney, Beijing,  Miami, Munich, Milan, San-Diego, Bangkok, Vienna, Dublin, Vancouver, Boston,  Zurich,  Melbourne, Budapest, Houston, Seattle, Montreal, Hong-Kong, Frankfurt, Sao-Paulo, Tel-Aviv, Copenhagen, Calgary, Orlando, Atlanta, Dallas, Hamburg, Osaka, Lisbon, Austin, Phoenix Naples, Oslo, Denver, Stockholm, Riyadh, Delhi, Buenos Aires, San-Jose, Brussels, Portland Philadelphia, Ottawa, Helsinki, Valencia, Brisbane, Warsaw, Minneapolis, Shanghai, Lyon, Adelaide, Edmonton, Marseille, Muscat, Athens, Stuttgart, Rio-De-Janeii, Baltimore, Auckland, Cologne, New-Orlean, Kuwait-City,  Kiev, Hanover, Perth, Minsk, Bucharest, Nashville, Dusseldorf, Manchester, Sacramento, Glasgow, Mexico-City, Salt-Lake-Ci, Raleigh, Cracow