紧固件 技术交货条件 碳钢和合金钢螺栓及螺钉的性能等级 性能等级转换

Fasteners

Technical delivery conditions
Property classes for carbon steel
and alloy steel bolts and screws
Conversion of property classes

DIN 267
Part 3

Mechanische Verbindungselemente; technische Lieferbedingungen;
Festigkeitsklassen für Schrauben aus unlegierten oder legierten
Stählen; Umstellung der Festigkeitsklassen

This standard, together with DIN ISO 898 Part 1, April 1979 edition, supersedes the October 1967 edition, which was withdrawn in 1979.

In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker.

This standard is concerned with the conversion of the previous property classes as defined in DIN 267 Part 3 (October 1967 edition) into the new property classes as defined in DIN ISO 898 Part 1 (April 1979 edition).

The designation system for property classes for bolts, screws and studs, and its meaning, the associated mechanical properties and test methods have not changed fundamentally and so interchangeability problems are not to be expected. Thus no amendment to the standard number is necessary in current documents. DIN 267 Part 3, October 1967 edition, shall no longer be used for new designs. DIN ISO 898 Part 1 automatically applies for orders or supplies in accordance with DIN 267 Part 3, unless otherwise agreed.

The table below compares the property classes from DIN 267 Part 3 (October 1967 edition) with those from DIN ISO 898 Part 1, indicating the assigned minimum tensile strength and yield stress values. The table also shows the property classes as defined in previous editions of DIN 267 (December 1960 edition).

The previous property classes 6.6, 6.9 and 14.9 are not specified in DIN ISO 898 Part 1, since they are no longer required. Property class 9.8, the application of which in Germany is not, however, foreseen in the near future, has been adopted for the first time.

In future, only DIN ISO 898 Part 1 is also to be applied to non-standardized bolts and screws, where property classes are required for these.

Current documents shall be converted to DIN ISO 898 Part 1.

Continued on page 2

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Standards referred to

Previous editions

DIN 266: 03.31; DIN 589: 07.31, 01.34; DIN Kr 550: 03.36; DIN 267 Part 1 and Part 2: 04.37; DIN 267: 06.40, 01.43, 01.54, 12.60; DIN 267 Part 3: 10.67

Amendments

The following amendments have been made in comparison with the October 1967 edition, which was withdrawn in 1979:

a) The content of the standard has been superseded by DIN ISO 898 Part 1.

b) A cross-reference and comparison chart for property classes of screws and bolts has been included.

International Patent Classification

B 25 B 29-02

G 01 L 5-24

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5 Maßtoleranzen

Die dargestellten Schrauben, Muttern und Dehnhülsen sind nur Beispiele. Für andere Arten von Schrauben, Muttern und Dehnhülsen gelten die Toleranzen sinngemäß.

1) Form L, K, KU und ZU siehe DIN 2510 Teil 3

(fortgesetzt)

3

5.4 Muttern

5.4.1 Sechskantmuttern

Bild 5

Bild 6

5.4.2 Kapselmuttern

Bild 7

(fortgesetzt)

4

6 Toleranzen für Form und Lage

Tabelle 4 (abgeschlossen)

Bild 8

Die Toleranzen für Form und Lage sind unabhängig vom Herstell-, Meß- oder Prüfverfahren.

Ist als Bezugselement der Gewinde-Außendurchmesser d (Gewinde-Nenndurchmesser) eingetragen, so wird in der Gewindeflanke aufgenommen oder gemessen.

Tabelle 5: Toleranzen für Form und Lage

(fortgesetzt)

5

6.2 Rechtwinkligkeitstoleranz

1) Siehe Seite 7

(fortgesetzt)

6