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ISO 9477 1992 High
strength cast steels for general engineering and structural purposes
This international standard specified
requirements for four grades of heat-treated cast carbon and alloy
steels for general engineering and structural purposes. They are
grade 410-620, 540-720, 620-820 and 840-1030.
The four steel grades are intended for service at ambient
temperature. However, properties at other temperatures may be agreed
on through the use of the supplementary requirements in ISO 4990.
Mechanical Properties
Steel used for castings shall conform to the mechanical property
requirements given in the following table.
Either the reduction of the area or the impact strength shall be
determined, and this shall conform to the requirements specified for
the grade in table 1. The choice of test will be at the discretion
of the manufacturer, unless specified by the purchaser at the time
of ordering.
|
Grade |
specimen/mm |
Mechanical Property |
|
σs /MPa |
σb /MPa |
δ ≥ (%) |
φ ≥(%) |
A KV / J |
|
410-620 |
28 |
410 |
620~770 |
16 |
40 |
20 |
|
540-720 |
28 |
540 |
720~870 |
14 |
35 |
20 |
|
620-820 |
28 |
620 |
820~970 |
11 |
30 |
18 |
|
840-1030 |
28 |
840 |
1030~1180 |
7 |
22 |
15 |
Chemical
Requirements
The maximum
contents of silicon, sulfur and phosphorus shall be 0.60%, 0.035%
and 0.035% respectively.
|
Grade |
Si |
P |
S |
Other |
|
410-620 |
≤ 0.60 |
≤ 0.035 |
≤ 0.035 |
Other chemical
components could be determined by buyer and seller.
|
|
540-720 |
≤ 0.60 |
≤ 0.035 |
≤ 0.035 |
|
620-820 |
≤ 0.60 |
≤ 0.035 |
≤ 0.035 |
|
840-1030 |
≤ 0.60 |
≤ 0.035 |
≤ 0.035 |
Other related standard:
ISO 3755 1991 cast
carbon steels for general engineering purposes
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