ASTM A194 Grade 7M Fasteners Manufacturer, supplier & Exporter in India.

leading manufacturer of ASTM A194 Grade 7M Fasteners, ASTM A194 7M Nuts, ASTM A194 Bolts, ASTM A194 Studs, ASTM A194 Threaded Rod.

ASTM A194 Grade 7M fasteners is a standard material specification for high tensile nuts and other internally threaded fasteners. Which are made from chromium molybdenum alloy steel. Grade 7M nuts can be produced by us are from hot forging technique. Which are used from bar stock (Grade Type AISI 4140/ 4142/ 4145/ 4140H/ 4142H/ 4145H) followed by heat treatment. ASTM A194 specification covers requirements for chemical composition, heat treatment, hardness, proof load, etc., for Grade 7M nuts.

At Star Steel Works we are specialized in manufacturing these types of fasteners. In various standard and non standard size and International grades, that’s meet our client requirements.

For More details on   Grade 7M Fasteners feel free to contact us on +91 9619984779 or reach us on enquiry@starsteelworks.com.

Types Of ASTM A194 Grade 4 Bolts
We Can Also Manufacture Other types of ASTM A194 Grade 4Bolts As per Drawing or sample.
Types Of ASTM A194 Grade 4 Nuts
We Can Also Manufacture Other types of ASTM A194 Grade 4 Nuts As per Drawing or sample.

Surface Coating

Available Alloy Steel Fasteners Grades
Alloy Steel Fasteners As Per astm Grades
  • Alloy Steel A193 Grade B5 Fasteners
  • Alloy Steel A193 Grade B6 Fasteners
  • Alloy Steel A193 Grade B7 Fasteners
  • Alloy Steel A193 Grade B16 Fasteners
  • Alloy Steel A193 Grade B8 Fasteners
  • Alloy Steel A193 Grade B8C Fasteners
  • Alloy Steel A193 Grade B8M Fasteners
  • Alloy Steel A193 Grade B8T Fasteners
  • Alloy Steel A193 Grade B8 Fasteners
  • Alloy Steel A193 Grade B8C Fasteners
  • Alloy Steel A193 Grade B8M Fasteners
  • Alloy Steel A193 Grade B8T Fasteners
  • Alloy Steel A320 Grade L7 Fasteners
  • Alloy Steel A320 Grade L7A Fasteners
  • Alloy Steel A320 Grade L7B Fasteners
  • Alloy Steel A320 Grade LC7 Fasteners
  • Alloy Steel A320 Grade L43 Fasteners
  • Alloy Steel A320 Grade B8 Fasteners
  • Alloy Steel A320 Grade B8C Fasteners
  • Alloy Steel A320 Grade B8T Fasteners
  • Alloy Steel A320 Grade B8F Fasteners
  • Alloy Steel A320 Grade B8M Fasteners
  • Alloy Steel A320 Grade B8 Fasteners
  • Alloy Steel A320 Grade B8C Fasteners
  • Alloy Steel A320 Grade B8F Fasteners
  • Alloy Steel A320 Grade B8M Fasteners
  • Alloy Steel A320 Grade B8T Fasteners
  • SAE J429 Grade 5 Fasteners
  • Alloy Steel A449 Fasteners
  • SAE J429 Grade 5.1 Fasteners
  • SAE J429 Grade 5.2 Fasteners
  • Alloy Steel A325 Type 1 Fasteners
  • Alloy Steel A325 Type 2 Fasteners
  • Alloy Steel A325 Type 3 Fasteners
  • Alloy Steel A354 Grade BB Fasteners
  • Alloy Steel A354 Grade BC Fasteners
  • Alloy Steel SAE J429 Grade 7 Fasteners
  • Alloy Steel SAE J429 Grade 8 Fasteners
  • Alloy Steel A354 Grade BD Fasteners
  • Alloy Steel SAE J429 Grade 8.1 Fasteners
  • Alloy Steel A490 Fasteners

ASTM A194 Grade 16 Fasteners Useful Information

 

ASTM A194

The ASTM A194 specification covers carbon, alloy and stainless steel nuts intended for use in high-pressure and/or high-temperature service. Unless otherwise specified, the American National Standard Heavy Hex Series (ANSI B 18.2.2) shall be used. Nuts up to and including 1 inch nominal size shall be UNC Series Class  2B fit. Nuts over 1 inch nominal size shall be either UNC Series Class 2B fit or 8 UN Series Class 2B fit. High strength ASTM A194 grade 2H nuts are common in the marketplace and are often substituted for ASTM A563 grade DH nuts due to the limited availability of DH nuts in certain diameters and finishes.

Each alloy shall conform to the chemical composition requirements prescribed. Hardness tests, proof of load tests, and cone proof load tests shall be made to all nuts to meet the requirements specified.

Grades Covered Under Astm A194
2 Carbon steel heavy hex nuts
2H Quenched & tempered carbon steel heavy hex nuts
2HM Quenched & tempered carbon steel heavy hex nuts
4 Quenched & tempered carbon-molybdenum heavy hex nuts
7 Quenched & tempered alloy steel heavy hex nuts
7M Quenched & tempered alloy steel heavy hex nuts
8 Stainless AISI 304 heavy hex nuts
8M Stainless AISI 316 heavy hex nuts
ASTM A194 Grade 16 Fasteners Mechanical Properties
Grade Identification Marking5 Specification Material Nominal Size, In. Tempering Temp. °F Proof Load Stress, ksi Hardness Rockwell See Note
Min Max
 ASTM A194 Grade 7M Fasteners ASTM A194 Grade 2 Medium Carbon Steel 1/4 – 4 0 150 159 352 1,2,3
 ASTM A194 Grade 7M Fasteners ASTM A194 Grade 2H Medium Carbon Steel, Quenched and Tempered 1/4 – 4 850 175 C24 C38 1,2
 ASTM A194 Grade 7M Fasteners ASTM A194 Grade 2HM Medium Carbon Steel, Quenched and Tempered 1/4 – 4 1150 150 159 237 1,2,3
 ASTM A194 Grade 7M Fasteners ASTM A194 Grade 4 Medium Carbon Alloy Steel, Quenched and Tempered 1/4 – 4 1100 175 C24 C38 1,2
 ASTM A194 Grade 7M Fasteners ASTM A194 Grade 7 Medium Carbon Alloy Steel, Quenched and Tempered 1/4 – 4 1100 175 C24 C38 1,2
 ASTM A194 Grade 7M Fasteners ASTM A194 Grade 7M Medium Carbon Alloy Steel, Quenched and Tempered 1/4 – 4 1150 150 159 237 1,2,3
 ASTM A194 Grade 7M Fasteners ASTM A194 Grade 8 Stainless AISI 304 1/4 – 4 - 80 126 300 4
 ASTM A194 Grade 7M Fasteners ASTM A194 Grade 8M Stainless AISI 316 1/4 – 4 - 80 126 300 4
NOTES:

 

  • 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 additionally be marked with the letter ‘B’. The letters H and M indicate heat treated nuts.
  • Properties shown are those of coarse and 8-pitch thread heavy hex nuts.
  • Hardness numbers are Brinell Hardness.
  • Nuts that are carbide-solution treated require additional letter A – 8A or 8MA.
  • All nuts shall bear the manufacturer’s identification mark. Nuts shall be legibly marked on one face to indicate the grade and process of the manufacturer. Marking of wrench flats or bearing surfaces is not permitted unless agreed upon between manufacturer and purchaser. Nuts coated with zinc have an asterisk (*) marked after the grade symbol. Nuts coated with cadmium shall have a plus sign (+) marked after the grade symbol.
  • Other less common grades exist, but are not listed here.
ASTM A194 Grade 7M Fasteners Chemical Properties
Element
2, 2H, and 2HM
4
7 and 7M (AISI 4140)
8 (AISI 304)
8M (AISI 316)
Carbon
0.40% min
0.40 – 0.50%
0.37 – 0.49%
0.08% max
0.08% max
Manganese
1.00% max
0.70 – 0.90%
0.65 – 1.10%
2.00% max
2.00% max
Phosphorus, max
0.040%
0.035%
0.035%
0.045%
0.045%
Sulfur, max
0.050%
0.040%
0.040%
0.030%
0.030%
Silicon
0.40% max
0.15 – 0.35%
0.15 – 0.35%
1.00% max
1.00% max
Chromium
0.75 – 1.20%
18.0 – 20.0%
16.0 – 18.0%
Nickel
8.0 – 11.0%
10.0 – 14.0%
Molybdenum
0.20 – 0.30%
0.15 – 0.25%
2.00 – 3.00%

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