ASTM A194 2HM Heavy Hex Nuts
Short Description:
ASTM A194/A194M 2HM Heavy Hex Nuts API 6A Flange Valve Wellhead Heavy Hex Nuts Dimension Standard: ASME B18.2.2, ASME B18.2.4.6M, ISO 4033, Din934 H=D Inch Size: 1/4”-4” Metric Size: M6-M100 Other Available Grade: ASTM A194/A194M 2H, 2HM, 4, 4L, 7, 7L, 7M, 8, 8M, 16 and so on. Finish: Plain, Black Oxide, Zinc Plated, Zinc Nickel Plated, Cadmium Plated, PTFE etc. Packing: Bulk about 25 kgs each carton, 36 cartons each pallet Advantage: High Quality, Competitive Price, Timely Delivery,Technical...
Product Detail
Product Tags
ASTM A194/A194M 2HM Heavy Hex Nuts
API 6A Flange Valve Wellhead Heavy Hex Nuts
Dimension Standard: ASME B18.2.2, ASME B18.2.4.6M, ISO 4033, Din934 H=D
Inch Size: 1/4”-4”
Metric Size: M6-M100
Other Available Grade:
ASTM A194/A194M 2H, 2HM, 4, 4L, 7, 7L, 7M, 8, 8M, 16 and so on.
Finish: Plain, Black Oxide, Zinc Plated, Zinc Nickel Plated, Cadmium Plated, PTFE etc.
Packing: Bulk about 25 kgs each carton, 36 cartons each pallet
Advantage: High Quality, Competitive Price, Timely Delivery,Technical Support, Supply Test Reports
Please feel free to contact us for more details.
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
|
Mechanical Properties Grade Identification Markings
Grade Identification Marking5
|
Specification
|
Material
|
Nominal Size, In.
|
Tempering Temp. °F
|
Proof Load Stress, ksi
|
Hardness Rockwell
|
See Note
|
|
Min
|
Max
|
|||||||
ASTM A194 Grade 2
|
Medium Carbon Steel
|
1/4 - 4
|
1000
|
150
|
159
|
352
|
1,2,3
|
|
ASTM A194 Grade 2H
|
Medium Carbon Steel, Quenched and Tempered
|
1/4 - 4
|
1000
|
175
|
C24
|
C38
|
1,2
|
|
ASTM A194 Grade 2HM
|
Medium Carbon Steel, Quenched and Tempered
|
1/4 - 4
|
1000
|
150
|
159
|
237
|
1,2,3
|
|
ASTM A194 Grade 4
|
Medium Carbon Alloy Steel, Quenched and Tempered
|
1/4 - 4
|
1100
|
175
|
C24
|
C38
|
1,2
|
|
ASTM A194 Grade 7
|
Medium Carbon Alloy Steel, Quenched and Tempered
|
1/4 - 4
|
1100
|
175
|
C24
|
C38
|
1,2
|
|
ASTM A194 Grade 7M
|
Medium Carbon Alloy Steel, Quenched and Tempered
|
1/4 - 4
|
1100
|
150
|
159
|
237
|
1,2,3
|
|
ASTM A194 Grade 8
|
Stainless AISI 304
|
1/4 - 4
|
-
|
80
|
126
|
300
|
4
|
|
ASTM A194 Grade 8M
|
Stainless AISI 316
|
1/4 - 4
|
-
|
80
|
126
|
300
|
4
|
|
NOTES:
1. 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.
2. Properties shown are those of coarse and 8-pitch thread heavy hex nuts.
3. Hardness numbers are Brinell Hardness.
4. Nuts that are carbide-solution treated require additional letter A - 8A or 8MA.
5. 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.
6. Other less common grades exist, but are not listed here.
Inch Fastener Standards. 7th ed. Cleveland: Industrial Fasteners Institute, 2003. N-80 - N-81.
|
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% |