Date Published:May. 10. 2016 Date Updated:Apr. 08. 2021

Property of Special Material Screws

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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

Al2MO3(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
60% Hydrofluoric Acid 20℃ 24 hours
10% Potassium Hydroxide 80℃ 7 Days
Potassium Hydroxide 500℃(Boiling) 24 hours
Sodium Hydroxide 500℃(Boiling) 24 hours
Sodium Carbonate 900℃(Boiling) 24 hours
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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