Technical information

Disamatic mould sizes

480x600 mm
600x775 mm
700x950 mm

Material qualities

BIRN produces grey iron, nodular iron and SiMo castings as specified in the following tables.

Special alloys can also be produced to customer specification and by agreement.

Grey iron as per EN 1561

Grade	Material No.
EN-GJL-150	EN-JL 1020
EN-GJL-200	EN-JL 1030
EN-GJL-250	EN-JL 1040
EN-GJL-300	EN-JL 1050

Properties:
good damping properties

Application examples:
gear housings, hydraulics housings, pump housings, brake discs, etc.

Nodular iron as per EN 1563

Grade	Material No.
EN-GJS-400-18-LT	EN-JS 1025
EN-GJS-400-15	EN-JS 1030
EN-GJS-450-10	EN-JS 1040
EN-GJS-500-7	EN-JS 1050
EN-GJS-600-3	EN-JS 1060
EN-GJS-700-2	EN-JS 1070

Properties:
good tensile strength, ductile

Application examples:
an alternative to steel and drop-forged parts in the automotive industry, for example

Silicon and molybdenum nodular iron

Grade

EN-GJS-XSiMo 4.05

EN-GJS-XSiMo 5.10

Properties:
good oxidation and heat resistance (max. working temperature approx. 800°C)

Application examples:
Turbocharger housings and exhaust pipes for diesel engines

Casting tolerances

For machine casting the tolerances are as per ISO 8062 CT8->CT10.

For annealed EN-GJL and EN-GJS as per CT9->CT10.

The tolerances include a mismatch allowance and shrinkage allowance.

For wall thickness the tolerance band used will be a degree higher than for ordinary dimensions.

Machining allowances

The normal machining allowances are:
2 mm for dimensions up to 120 mm
2.5-3 mm for dimensions in excess of 120 mm

See also ISO 8062, grades F-G.

Pattern draft specification

As casting tolerances as per the standards do not include draft, it is important to specify where the draft should be located in relation to the drawing dimensions.

Types of pattern draft: +draft, -draft and +/-draft

The draft has to be adjusted to the pattern height.
A deep pattern can make do with a small amount of draft, whereas a shallow pattern needs a lot of draft.