The Properties of Screws Made of Special Materials

Mechanical Properties

Properties Inconel*
(NCF600)
SNSI
Pure Molybdenum
SNSM
Hastelloy*
C-276
(NW0276)
SNSH-C276
Hastelloy*
C-22
(NW6022)
SNSH-C22
Nichel
(NW2201)
SNSN
Super Invar
SNSIV
Phosphor Bronze
(C5191)
SNSP
Aluminum Alloy
(A5056)
SNSA
Tensile Strength(N/mm2) 548 - 695 515 793 786 343 - 411 470 590以上 294
0.2% Proof Stress(N/mm2) 205 - 352 380 400 365 68 - 166 333 245
Elongation(%) 35 - 55 15 60 57 40 - 60 43 8 12
Hardness 65 - 85(HRB) 92(HRB) 75 - 100(HB) 143(HV) 98(HB)

●Values in chart are for reference only. They are not guaranteed values.

Physical Properties

Properties Inconel*
(NCF600)
SNSI
Pure Molybdenum
SNSM
Hastelloy*
C-276
(NW0276)
SNSH-C276
Hastelloy*
C-22
(NW6022)
SNSH-C22
Nickel
(NW2201)
SNSN
Super Invar
SNSIV
Phosphor Bronze
(C5191)
SNSP
Aluminum Alloy
(A5056)
SNSA
Specific Gravity 8.42 10.2 8.89 8.61 8.89 8.15 8.83 2.64
Longitudina
Elastic Modulus (GPa)
207 327 205 209 206 132 105 71.7
Thermal Conductivity (W/(m・K) 16.7 142 79.5 10.47 67 112
Linear Expansion Coefficien(K-1) 13.4×10-6 5.1×10-6 11.2×10-6 12.4×10-6 13.4×10-6 0.69×10-6 18×10-6 24.1×10-6
Electric Resistance (μΩ・m) 1.0 0.058 1.3 1.2 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* Hastelly* Nickel
Dilute Sulfuric Acid Acid Room Temperature Boiling Point A AA A
Boiling Point D A D
Concentrate Sulfuric Acid Acid Room Temperature Boiling Point C AA C
Boiling Point D D D
Dilute Hydrochloric Acid Acid Room Temperature Boiling Point B AA A
Boiling Point D D D
Concentrate Hydrochloric Acid Acid Room Temperature Boiling Point D AA D
Boiling Point D B D
Dilute Nitric Acid Acid Room Temperature Boiling Point D AA D
Boiling Point AA D
Concentrate Nitric Acid Acid Room Temperature Boiling Point A AA D
Boiling Point D D
Dilute Phosphoric Acid Acid Room Temperature Boiling Point AA AA AA
Boiling Point AA D
Concentrate Phosphoric Acid Acid Room Temperature Boiling Point AA AA AA
Boiling Point B D
Sodium Hydroxide (Diluted) Acid Room Temperature Boiling Point AA AA
Boiling Point C AA
Sodium Hydroxide (Concentrated) Acid Room Temperature Boiling Point AA AA
Boiling Point C AA
  • AA :Excellent
  •  A :Good
  •  B :Useable
  •  C :Useable under certain conditions
  •  D :Non Useable

*Inconel is a registered trademark of Special Metals Corporation.
Hastelloy is a registered trademark of Haynes International, Inc.

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

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 Screws

  Phosphor Bronze SUSXM7(SUS304相当)
Magnetic Flux Density(T) 0 5×10-5

Measuring device:5080 Gauss (Tesla) Meter by F.W.BELL

Measuring conditions:DC magnetic field measuring mode
Probe and sample separation distance: 5 mm

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