Date Published:May. 10. 2016 Date Updated:Apr. 08. 2021
Property of Special Material Screws
Property of Special Material Screws
Mechanical property
| Property |
Inconel* (NCF600) SNSI |
Pure molybdenum SNSM SNFCM |
Hastelloy**C-276 (NW0276) SNSH-C276 |
Hastelloy**C-22 (NW6022) SNSH-C22 |
Monel 400 equiv (UNS N0400) SNSMN |
Nickel (NW2201) SNSN |
Super Invar SNSIV |
Phosphor bronze (C5191) SNSP |
Aluminum Alloy (A5056) SNSA |
|---|---|---|---|---|---|---|---|---|---|
| Tensile strength (N/mm2) |
548 - 695 | 515 | 793 | 786 | 517 - 620 | 343 - 411 | 470 | 590以上 | 294 |
| 0.2% durability (N/mm2) |
205 - 352 | 380 | 400 | 365 | 172 - 345 | 68 - 166 | 333 | － | 245 |
| Extension (%) | 35 - 55 | 15 | 60 | 57 | 35 - 60 | 40 - 60 | 43 | 8 | 12 |
| Hardness |
65 - 85(HRB) | － | － | 92(HRB) | 60 - 80(HRB) | 75 - 100(HB) | 143(HV) | － | 98(HB) |
Values in chart are for reference only. They are not guaranteed values.
Physical property
| Property |
Inconel* (NCF600) SNSI |
Pure molybdenum SNSM SNFCM |
Hastelloy*C-276 (NW0276) SNSH-C276 |
Hastelloy*C-22 (NW6022) SNSH-C22 |
Monel 400 equiv (UNS N0400) SNSMN |
Nickel (NW2201) SNSN |
Super Invar SNSIV |
Phosphor bronze (C5191) SNSP |
Aluminum Alloy (A5056) SNSA |
|---|---|---|---|---|---|---|---|---|---|
| Specific gravity |
8.42 | 10.2 | 8.89 | 8.61 | 8.80 | 8.89 | 8.15 | 8.83 | 2.64 |
| Longitudinal elastic modulus (GPa) |
207 | 327 | 205 | 209 | 179 | 206 | 132 | 105 | 71.7 |
| Heat thermal conductivity (W/(m・K) |
16.7 | 142 | － | － | 22 | 79.5 | 10.47 | 67 | 112 |
| Linear expansion coefficient (K-1) |
13.4×10-6 | 5.1×10-6 | 11.2×10-6 | 12.4×10-6 | 14.2×10-6(100℃) | 13.4×10-6 | 0.69×10-6 | 18×10-6 | 24.1×10-6 |
| Electric resistivity (μΩ・m) |
1.0 | 0.058 | 1.3 | 1.2 | 0.5 | 0.085 | 0.77 | 0.13 | 0.064 |
Values in chart are for reference only. They are not guaranteed values.
Chemical resistance of Inconel*, Hastelloy** and nickel screws
| Chemical name |
Temperature |
Inconel* | Hastelloy** | Nickel |
|---|---|---|---|---|
| Dilute sulfuric acid |
Room temperature |
A | AA | A |
| Boiling point |
D | A | D | |
| Concentrated sulfuric acid |
Room temperature |
C | AA | C |
| Boiling point |
D | D | D | |
| Dilute hydrochloric acid |
Room temperature |
B | AA | A |
| Boiling point |
D | D | D | |
| Concentrated hydrochloric acid |
Room temperature |
D | AA | D |
| Boiling point |
D | B | D | |
| Dilute nitric acid |
Room temperature |
D | AA | D |
| Boiling point |
－ | AA | D | |
| Concentrated nitric acid |
Room temperature |
A | AA | D |
| Boiling point |
－ | D | D | |
| Dilute phosphoric acid |
Room temperature |
AA | AA | AA |
| Boiling point |
－ | AA | D | |
| Concentrated phosphoric acid |
Room temperature |
AA | AA | AA |
| Boiling point |
－ | B | D | |
| Sodium hydroxide(weak) | Room temperature |
AA | － | AA |
| Boiling point |
C | － | AA | |
| Sodium hydroxide(concentrated) | Room temperature |
AA | － | AA |
| Boiling point |
C | － | AA |
- AA ：Highly Excellent
- A ：Very Good
- B ：Satisfactory
- C ：Limit
- D ：Not satisfactory
* Inconel is a registered trademark of Special Metals Corporation.
** Hastelloy is a registered trademark of Haynes.
- A test piece was used to acquire the test data.
- Chemical resistance changes with performance conditions.
Always carry out tests under performance conditions similar to actual conditions in advance.
Magnetic flux density of phosphor bronze screw
| Phosphor bronze |
SUSXM7(Equivalent to SUS304) | |
|---|---|---|
| Magnetic flux density(Ｔ) |
0 | 5×10-5 |
Measurement device : F.W.BELL 5080 type gauss (tesla) meter
Measurement condition : DC magnetic field measurement mode Distance between probe and sample 5 mm
The Properties of Ceramic Screws
Physical Properties of Ceramic Screws
| Al2O3(99.5% Alumina) | |
|---|---|
| Specific Gravity | 3.9 - 3.939 |
| Flexural Strength(N/mm2) | 360 |
| Volume Resistivity(Ω・m) | ＞1012 |
| Thermal Conductivity(W/(m・K)) | 32(20℃) |
| Linear Expansion Coefficient(K-1) | 7.2×10-6(40 - 400℃) |
| Vickers Hardness(GPa) | 15.5 |
| Maximum Duty Temperature(℃)(GPa) | 1500 |
- Values in chart are for reference only. They are not guaranteed values.
Chemical Resistance of Ceramic Screws
| Chemical Name | Temperature | Hour | Effect |
|---|---|---|---|
| 35% Hydrochloric Acid | Boiling | 30 minutes | ◎ |
| 70% Nitric Acid | Boiling | 30 minutes | ◎ |
| 98% Sulfuric Acid | Boiling | 30 minutes | ◎ |
| 90% Phosphoric Acid | Boiling | 30 minutes | 〇 |
| 60% Hydrofluoric Acid | 20℃ | 24 hours | △ |
| 10% Potassium Hydroxide | 80℃ | 7 Days | ◎ |
| Potassium Hydroxide | 500℃(Boiling) | 24 hours | △ |
| Sodium Hydroxide | 500℃(Boiling) | 24 hours | 〇 |
| Sodium Carbonate | 900℃(Boiling) | 24 hours | 〇 |
| Sodium Sulfate | 1000℃(Boiling) | 24 hours | ◎ |
| Potassium Fluoride | 90℃(Boiling) | 4 hours | × |
- ◎：No Corrosion
- 〇：Slight Corrosion
- △：Moderate Corrosion
- ×：Heavy Corrosion
- When tightening ceramic screws, use a torque driver or torque wrench and do not exceed the torsional torque.The recommended torque is 50% of the torsional torque.
M Torsional Torque (N・m) M3 0.04 M4 0.05 M5 0.10 M6 0.15 M8 0.30 M10 0.50
- Values in chart are for reference only. They are not guaranteed values.
- Heat resistance and chemical resistance change with performance conditions. Always carry out tests under performance conditions similar to actual conditions in advance.
- Ceramic screws may be damaged by impact. Take care when handling these screws.
- Also, ceramics screws with special specifications such as ventilation holes, dimensions, shapes, and cleanroom washing are available. Please contact us for details.
Engineering Tips HINTS for NEW IDEAS
Examples to help you resolve any issues you may have.
Technical Data
Others
Machine Tools
Semiconductor Manufacturing Equipment
Food Machinery
Automotive Manufacturing Process
Medical Equipment
FA Devices
Technical Data
Special Screws
