Date Published:May. 10. 2016 Date Updated:Apr. 08. 2021
Property of Special Material Screws
Property of Special Material Screws
Mechanical property
| Property |
Inconel* equiv (NCF600) SNSI |
Pure molybdenum SNSM SNFCM |
Hastelloy**C-276 equiv (NW0276) SNSH-C276 |
Hastelloy**C-22 equiv (NW6022) SNSH-C22 |
Monel 400 equiv (UNS N0400) SNSMN |
Nickel (NW2201) SNSN |
Super Invar SNSIV |
Phosphor bronze (C5191) SNSP |
Aluminum Alloy (A5056) SNSA |
Tantalum SNSTA |
MAT21 （UNS N06210） SNSMT |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Tensile strength (N/mm2) |
548 - 695 | 515 | 793 | 786 | 517 - 620 | 343 - 411 | 470 | 590 or Higher | 294 | 271 | 690 |
| 0.2% durability (N/mm2) |
205 - 352 | 380 | 400 | 365 | 172 - 345 | 68 - 166 | 333 | － | 245 | 189 | 310 |
| Extension (%) | 35 - 55 | 15 | 60 | 57 | 35 - 60 | 40 - 60 | 43 | 8 | 12 | 51.2 | 45 |
| 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* equiv (NCF600) SNSI |
Pure molybdenum SNSM SNFCM |
Hastelloy*C-276 equiv (NW0276) SNSH-C276 |
Hastelloy*C-22 equiv (NW6022) SNSH-C22 |
Monel 400 equiv (UNS N0400) SNSMN |
Nickel (NW2201) SNSN |
Super Invar SNSIV |
Phosphor bronze (C5191) SNSP |
Aluminum Alloy (A5056) SNSA |
Tantalum SNSTA |
MAT21 （UNS N06210） SNSMT |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Specific gravity |
8.42 | 10.2 | 8.89 | 8.61 | 8.80 | 8.89 | 8.15 | 8.83 | 2.64 | 16.65 | 8.76 |
| Longitudinal elastic modulus (GPa) |
207 | 327 | 205 | 209 | 179 | 206 | 132 | 105 | 71.7 | 185 |
205 |
| 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 | 6.4×10-6 |
12.0×10-6 |
| Electric resistivity (μΩ・m) |
1.0 | 0.058 | 1.3 | 1.2 | 0.5 | 0.085 | 0.77 | 0.13 | 0.064 | － |
1.274 |
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.
Chemical resistance of MAT21
| Chemical Name | Composition (%) | Temperature | MAT21 (UNS N06210) |
|
|---|---|---|---|---|
| HCI | 1 | Boiling Point |
◎ |
|
| 2 | Boiling Point |
◎ |
||
| 4 | Boiling Point |
△ |
||
| 5 | Boiling Point |
△ |
||
| H2SO4 |
10 | Boiling Point |
◎ |
|
| 40 | Boiling Point |
△ |
||
| Mixed Fluids |
H2SO4 |
10 | Boiling Point |
△ |
| HCI |
2 | |||
| Mixed Fluids |
H2SO4 |
20 | 80°C |
◎ |
| HCI |
1.5 | |||
| Mixed Fluids |
H2SO4 |
50 | 50°C |
○ |
| HCI |
1.5 | |||
| HNO3 |
10 | Boiling Point |
◎ |
|
| H3PO4 |
85 | Boiling Point |
○ |
|
| Method B |
※ |
Boiling Point |
○ |
|
※ 23.0% sulfuric acid + 1.2% hydrochloric acid + 1% iron (III) chloride + 1% copper (II) chloride
- ◎：＜0.127 mm/year
- ○：0.127 - 0.508 mm/year
- △：0.508 - 1.27 mm/year
- ×：＞1.27 mm/year
- 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.
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