Standard Specification For ASTM A194 Grade 8 Heavy Hex Nuts
- Standard: ASME/ANSI B18.2.2; DIN439
- Size: 1/4''–1-1/2’’; M6 – M42
- Material: Carbon Steel, Alloy Steel, Stainless Steel, Brass
- Grade: ASTM A563 Gr. DH; SAE J995 Gr.5.8
- Thread: M, UNC, UNF
- Finish: Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G.
Material |
Specification |
Standards |
Size |
Length |
ASTM A194 Grade 8 Heavy Hex Nuts |
IS BS ASTM |
DIN, ISO, JIS, GB, IS, BS, ASTM |
M 02 to M 160 |
3 mm to 200 mm |
Stud Bolt Grade |
ASTM A194 Nuts |
Washers |
L7 |
A194 Grade 4 or 7 |
F436 |
L43 |
A194 Grade 4 or 7 |
F436 |
B8 Class 1 |
A194 Grade 8 |
SS304 |
B8M Class 1 |
A194 Grade 8M |
SS316 |
B8 Class 2 |
A194 Grade 8 |
SS304 |
B8M Class 2 |
A194 Grade 8M |
SS316 |
B7 |
A194 Grade 2H |
F436 |
B7M |
A194 Grade 2HM |
F436 |
B16 |
A194 Grade 4 or Grade 7 |
F436 |
Types Of ASTM A194 Grade 8 Heavy Hex Nuts
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 |
 |
Astm A194 GR.8 Heavy Hex Nuts |
Astm A194 GR.8 Hex Nuts |
Astm A194 GR.8 Coupler Nuts |
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 |
 |
Astm A194 GR.8 Lock Nut |
Astm A194 GR.8 Nylon Insert Nut |
Astm A194 GR.8 Self Locking Nuts |
Chemical Composition of Stainless Steel ASTM A194 Grade 8 Heavy Hex Nuts
| Element | ASTM A194 GR.8 |
| Carbon | 0.08 max |
| Manganese | 2.00 Max |
| Phosphorus, max | 0.05% |
| Sulfur, max | 0.03% |
| Silicon | 1.00% max |
| Chromium | 18.0-20.0% |
| Nickel | 8.0-11.0% |
| Molybdenum | - |
ASTM A194 Grade 8 Heavy Hex Nuts Mechanical Properties
| Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa) | 550 |
| Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa) | 240 |
| Elongation in 4D (El) | 30 |
| Reduction | 40 |
| Hardness – (BHN) | 223 |
A194 Nuts Grades
| ASTM A194 Grade 2 | Carbon steel heavy hex nuts |
|---|---|
| ASTM A194 Grade 2H | Quenched & tempered carbon steel heavy hex nuts |
| ASTM A194 Grade 2HM | Quenched & tempered carbon steel heavy hex nuts, 100% hardness tested |
| ASTM A194 Grade 4 | Quenched & tempered carbon-molybdenum heavy hex nuts (withdrawn in 2017) |
| ASTM A194 Grade 7 | Quenched & tempered alloy steel heavy hex nuts |
| ASTM A194 Grade 7M | Quenched & tempered alloy steel heavy hex nuts, 100% hardness tested |
| ASTM A194 Grade 7L | Quenched & tempered alloy steel heavy hex nuts, Charpy impact tested |
| ASTM A194 Grade 8 | Stainless AISI 304 heavy hex nuts |
| ASTM A194 Grade 8M | Stainless AISI 316 heavy hex nuts |
ASTM A194 Nuts Mechanical Properties
| Nuts Grade Identification Marking 5 | ASTM A194 Nuts Specification | ASTM A194 Nuts Material | Nominal Size, In. | Tempering Temp. °F | Proof Load Stress, ksi | Hardness Rockwell | |
|---|---|---|---|---|---|---|---|
| Min | Max | ||||||
 |
ASTM A194 Grade 2 Nuts | Medium Carbon Steel | 1/4 - 4 | 0 | 150 | 159 | 352 |
 |
ASTM A194 Grade 2H Nuts | Medium Carbon Steel, Quenched and Tempered | 1/4 - 4 | 850 | 175 | C24 | C38 |
 |
ASTM A194 Grade 2HM Nuts | Medium Carbon Steel, Quenched and Tempered | 1/4 - 4 | 1150 | 150 | 159 | 237 |
 |
ASTM A194 Grade 4 Nuts | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1100 | 175 | C24 | C38 |
 |
ASTM A194 Grade 7 Nuts | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1100 | 175 | C24 | C38 |
 |
ASTM A194 Grade 7M Nuts | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1150 | 150 | 159 | 237 |
 |
ASTM A194 Grade 8 Nuts | Stainless AISI 304 | 1/4 - 4 | - | 80 | 126 | 300 |
 |
ASTM A194 Grade 8M Nuts | Stainless AISI 316 | 1/4 - 4 | - | 80 | 126 | 300 |
ASTM A194 Nuts 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% |
| Grade | Carbon | Manganese | Phosphorous, max | Sulfur, max | Silicon | Chromium | Nickel | Molybdenum | Other Elements |
|---|---|---|---|---|---|---|---|---|---|
| 2, 2H and 2 HM | 0.40% min. | 1.00% max. | 0.04% | 0.05% | 0.40% max | ||||
| 3 | 0.10% min. | 1.00% max. | 0.04% | 0.03% | 1.00% | 4.0-6.0% | 0.20-0.30% | ||
| 4 | 0.40 -0.50% | 0.70-0.90% | 0.035% | 0.04% | 0.15-0.35% | 0.20-0.30% | |||
| 6 | 0.15% | 1.00% | 0.04% | 0.03% | 1.00% | 11.5-13.5% | |||
| 6F | 0.15% | 1.25% | 0.06% | 0.06% | 1.00% | 12.0-14.0% | Selenium-0.15% min | ||
| 7 and 7M (AISI 4140) | 0.37-0.49% | 0.65-1.10% | 0.04% | 0.04% | 0.15-0.035% | 0.75-1.20% | 0.15-0.25% | ||
| 8 (AISI 304) | 0.08% | 2.00% max | 0.05% | 0.03% | 1.00% max | 18.0-20.0% | 8.0-11.0% | ||
| 8M (AISI 316) | 0.08% | 2.00% max | 0.05% | 0.30% | 1.00% max | 16.0-18.0% | 10.0-14.0% | 2.00-3.00% | |
| 8C | 0.08% | 2.00% | 0.045% | 0.03% | 1.00% | 17.0-19.0% | 9.0-12.0% | Columbium and Tantalum – 10x carbon content, min | |
| 8T | 0.80% | 2.00% | 0.045% | 0.30% | 1.00% | 17.0-19.0% | 9.0-12.0% | Titanium-0.70%max, Nitrogen-0.10% | |
| 8F | 0.15% | 2.00% | 0.20% | 0.15%min | 1.00% | 17.0-19.0% | 8.0-10.0% | ||
| 8R | 0.06% | 4.0-6.0% | 0.045% | 0.03% | 1.00% | 20.5-23.5% | 11.5-13.5% | 1.50-3.00% | Columbium and Tantalum-0.10-0.30%, Nirogen-0.20-0.40%, Vanadium-0.10-0.30% |
| 8S | 0.10% | 7.0-9.0% | 0.060% | 0.03% | 3.5-4.5% | 16.0-18.0% | 8.0-9.0% | Nitrogen-0.08-0.18% | |
| 16 | 0.36-0.47% | 0.45-0.70% | 0.035% | 0.40% | 0.15-0.35% | 0.80-1.15% | 0.50-0.65% | Vanadium-0.25-0.35%, Aluminum-0.015% |
ASTM A194 GR.8 Nuts Price
- M8 Heavy Hexagon Nut - A194 Grade 8 (T304 Stainless Steel)
NUTS/GR8SS/HEX-M8
Price £ 0.60 - M10 Heavy Hexagon Nut - A194 Grade 8 (T304 Stainless Steel)
NUTS/GR8SS/HEX-M10
Price £ 0.72 - M12 Heavy Hexagon Nut - A194 Grade 8 (T304 Stainless Steel)
NUTS/GR8SS/HEX-M12
Price £ 0.96 - M16 Heavy Hexagon Nut - A194 Grade 8 (T304 Stainless Steel)
NUTS/GR8SS/HEX-M16
Price £ 1.18 - M6 Heavy Hexagon Nut - A194 Grade 8 (T304 Stainless Steel)
NUTS/GR8SS/HEX-M6
Price £ 1.22 - M8 Thin Hexagon Nut - A194 Grade 8 (T304 Stainless Steel)
NUTS/GR8SS/THIN-M8
Price £ 1.56 - M20 Heavy Hexagon Nut - A194 Grade 8 (T304 Stainless Steel)
NUTS/GR8SS/HEX-M20
Price £ 2.69 - M24 Heavy Hexagon Nut - A194 Grade 8 (T304 Stainless Steel)
NUTS/GR8SS/HEX-M24
Price £ 3.60