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NINGBO STEEL BOLT
CO., LTD
Address:Panjiashan, Xiepu Town, Zhenhai, Ningbo, China
Tel:
+86-574-86231358
Fax:
+86-574-86231338
Email:
bolt@ningbo-bolt.com
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Product
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For the property classes 4.8, 5.8 and 6.8 the values for Rpf min are
under investigation. The present values are given for calculation of
the proof stress ratio only. They are not test values.
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Hardness determined at the end of a fastener shall be 250 HV, 238 HB
or 99,5 HRB maximum.
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Any increase in hardness at the surface which indicates that the
surface hardness exceeds 390 HV is not acceptable.
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This SAE Standard covers the mechanical and material requirements
for three grades of steel nuts suitable for use in automotive and
related engineering applications, in sizes 1/4 to 1-1/2 in,
inclusive, and with dimensions conforming with the requirements of
the latest issue...
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Nuts conforming to the requirements of this part of ISO 898 are
evaluated at that ambient temperature range. It is possible that
they do not retain the specified mechanical and physical properties
at elevated and/or lower temperatures.
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Alloying elements may be added, provided the mechanical properties
required in Clause 7 are fulfilled.
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ASTM A194 specification covers a variety of carbon, alloy, and
martensitic stainless steel nuts in the size range 1/4 through 4 in.
and metric M6 through M100 nominal.
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ASTM A563 is a standard material specification for carbon and alloy
steel nuts general structural and mechanical uses on bolts, studs,
and other externally threaded fasteners.
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Mechanical Properties of Class 8 to AS/NZS 1252 Structural Nuts
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Mechanical Properties of
EN14399-3 Structural Nuts
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For the application of thin nuts, it should be considered that the
stripping load is lower than the proof load of a nut with full
loadability
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For the application of thin nuts, it should be considered that the
stripping load is lower than the proof load of a nut with full
loadability
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