Characteristics for Special Material Screws

• Physical Properties

  	Titanium	Hastelloy	Inconel	Nickel	Molybdenum	Phosphor Bronze	Aluminum	SUS310S	SUSXM7
  Specific Gravity	4.5	8.69	8.47	8.89	10.2	8.89	2.64	7.98	.93
  Longitudinal Elastic Modulus(N/mm2)	106.4×103	206×103	214×103	204×103	327×103	110×103	70×103	-	-
  Transverse Elastic Modulus(N/mm2)	-	-	80.8×103	80.7×103	121×103	-	26×103	-	-
  Electric Resistance(μΩ/cm)	55	114(Room Temperature)	103(Room Temperature)	9.6(Room Temperature)	5.7(20ºC)	-	-	78	72
  Specific Heat(J/kg/K)	-	414(Room Temperature)	444(Room Temperature)	456(Room Temperature)	260(20ºC)	-	-	500	500
  Thermal Conductivity(W/(m·K))	17.16	10.1(48ºC)	14.9(Room Temperature)	70.2(Room Temperature)	142.4(20ºC)	70	110(25ºC)	14	17
  Linear Expansion Coefficient(K-1)	8.4×10-6	12.4×10-6 (24ºC~204ºC)	13.8×10-6 (21ºC~204ºC)	13.3×10-6 (21ºC~93ºC)	5.2×10-6 (100ºC)	17.6×10-6	24×10-6	15.9×10-6	16.7×10-6

• Mechanical Properties

  	Titanium	Hastelloy	Inconel	Nickel	Molybdenum	Phosphor Bronze	Aluminum	SUS310S	SUSXM7
  Tensile Strength(N/mm2)	400(0ºC)	800	670	450	550	590~685	294	520	500
  0.2%Proof Stress(N/mm2)	-	405	370	240	-	-	245	205	210
  Elongation(％)	38(0ºC)	57	36	43	2.9	8~	12	40	-
  Hardness	-	93(HRB)	87(HRB)	72(HRB)	95(HRB)	180~230(HB)	98(HB)	98(HB)	-

  ·The numerical values listed above are for reference only; they are not guaranteed under performance conditions.

• Tensional Breaking Force of Special Material Screws (N)

  	Titanium*	Hastelloy	Inconel	Nickel	Molybdenum	Phosphor Bronze	Aluminum	SUS310S	SUSXM7***
  M3	3210	4020	2760	2110	3720	3370	1650	2860	2500
  M4	5610	7020	4820	3680	6490	5880	2890	4990	4400
  M5	9080	11300	7810	5960	10500	9510	4680	8070	7100
  M6	12800	16000	11000	8440	14800	13400	6630	11400	10100
  M8	23400	29200	20100	15300	27000	24500	12000	20800	18300
  M10	37100	46400	31900	24300	42900	-	-	32900	29000
  M12	53900	-	-	-	-	-	-	-	42200

  ·The numerical values listed above are for reference only; they are not guaranteed under performance conditions.
  *The values are for Titanium Socket Head Cap Screws SNST .
  ***Values are when Strength Classification A2-50.

• Tensional Breaking Torque Special Material Screws (N/m)

  	Titanium*	Ceramic
  M3	1.5	0.6
  M4	3.4	0.8
  M5	7.1	1.3
  M6	12	2
  M8	29	4
  M10	59	5
  M12	103	-

  ·The numerical values listed above are for reference only; they are not guaranteed under performance conditions.
  *These values are for Titanium Socket Head Cap screws SNST .

• Magnetic Flux Density of Titanium Screws and Phosphor Bronze Screws

  	Titanium*	Phosphor Bronze*	SUSXM7 (SUS304 Equivalent)
  Magnetic Flux Density (T)	0	0	5×10-5

  Measuring Device: FW Bell 5080 Gauss/Tesla Meter
  Measuring conditions: DC Magnetic Measuring Field 5mm distance between the probe and the sample

• Chemical Resistance

  Chemical Names	Composition (%)	Titanium
  Hydrochloric Acid	10	B
  	30	D
  Sulfuric Acid	10	C
  	50	D
  Nitric Acid	10	A
  	50	A
  Nitrohydrochloric Aid (HCl:HNO3)	3:1	A
  Chromic Acid	5	A
  Hydrofluoric Acid	5	D
  Phosphoric Acid	50	C
  Ferric Chloride	10~30	A
  Cupric Chloride	10~30	B
  Sodium Chloride	10~40	A
  Calcium Chloride	50	A
  Ammonium Chloride	40	A
  Magnesium Chloride	40	A
  Ferrous Sulfate	10~50	A
  Ammonia	10~30	A
  Sodium Hydroxide	50	A
  Sodium Carbonate	10	A
  Hydrogen Sulfide	Dry Gas	A
  	Wet Gas	A
  Chlorine	Dry Gas	D
  	Wet Gas	A
  Sulfur Dioxide	Dry/Wet Gas	A
  Seawater	High Speed Stream	A
  Formic Acid	10~50	B
  Lactic Acid	50	A
  Oxalic Acid	20	D
  Citric Acid	10~50	A

  Testing Temperature: Room Temperature
  A：<0.127 mm/year
  B：0.127~0.508 mm/year
  C：0.508~1.27 mm/year
  D：>1.27 mm/year

• Chemical Resistance for Hastelloy/Inconel/Nickel

  Chemical Names	Temperature	Hastelloy	Inconel	Nickel
  Dilute Sulfuric Acid	Room Temperature	AA	A	A
  	Boiling Point	A	D	D
  Concentrate Sulfuric Acid	Room Temperature	AA	C	C
  	Boiling Point	D	D	D
  Dilute Hydrochloric Acid	Room Temperature	AA	B	A
  	Boiling Point	D	D	D
  Concentrate Hydrochloric Acid	Room Temperature	AA	D	D
  	Boiling Point	B	D	D
  Dilute Nitric Acid	Room Temperature	AA	D	D
  	Boiling Point	AA	－	D
  Concentrate Nitric Acid	Room Temperature	AA	A	D
  	Boiling Point	D	－	D
  Dilute Phosphoric Acid	Room Temperature	AA	AA	AA
  	Boiling Point	AA	－	D
  Concentrate Phosphoric Acid	Room Temperature	AA	AA	AA
  	Boiling Point	B	－	D
  Sodium Hydroxide (Diluted)	Room Temperature	－	AA	AA
  	Boiling Point	－	C	AA
  Sodium Hydroxide (Concentrated)	Room Temperature	－	AA	AA
  	Boiling Point	－	C	AA

  AA：Excellent
  A ：Good
  B ：Useable
  C ：Useable under certain conditions
  D ：Non Useable

Characteristics for Ceramic Screws