標準號：DIN 267-24-2007
中文標準名稱：緊固件.交貨技術條件.第24部分:不帶規(guī)定驗證載荷值的螺母用硬度等級
英文標準名稱：Fasteners - Technical delivery conditions - Part 24: Hardness classes for nuts without specified proof load values
標準類型：J13
發(fā)布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：J13
國際標準分類號：21.060.20
引用標準：DIN 267-13;DIN EN 20898-2;DIN EN ISO 898-6;DIN EN ISO 2320;DIN EN ISO 3506-2;DIN EN ISO 6157-2;DIN EN ISO 6506-1;DIN EN ISO 6507-1;DIN EN ISO 18265
適用范圍：This standard contains hardness classes for nuts which do not have to withstand specified proof loads. Thehardness classes specified have been classified according to minimum hardness values from which, however,no conclusions can be drawn with regard to the Ioadability of the nuts or their resistance to stripping. Thefunctional properties of nuts depend on their form.This standard does not apply to the following: nuts subjected to specified proof loads to DIN EN 20898-2 and DIN EN ISO 898-6; prevailing torque-type nuts to DIN EN ISO 2320; nuts with special requirements, such as weldability, corrosion resistance (see DIN EN ISO 3506-2), high- temperature strength (i.e. at temperatures over +300~C) or low-temperature toughness (i.e. at temperatures below-50 ~C (see DIN 267-13)).NOTE Nuts made of free-cutting steel shall not be used at temperatures over +250 ~C.