EN-GJL-250

Cast type

Cast iron with lamellar graphite

Material No.

 EN-JL-1040

US standard (AISI)

No. 25 B

DIN EN 10027-2

5.1301

Abbreviation

EN-GJL-250 

Old designation 

GG-25
DIN 1561

Composition
[%]

C: 3.20 – 3.50
Si: 2.50 – 2.70
Mn: 0.50 – 0.80
P: 0.1 – 0.2
S: 0.1
Cu: 0.1 – 0.6

Density [g/cm³]

7.20

R0.2 N/mm²
Yield strength

 - 

0.1% elongation limit
Rp0.1 N/mm²

165 – 228

Tensile strength
Rm [N/mm²]

250 – 350

Brinell hardness  HB30
Sample <30 mm

190 – 230

Elongation after fracture  A%

0.8 – 0.3

Elastic modulus    E   kN/mm²

103 – 118

Compressive strength   Sdb  N/mm²

840

Workability

Very good

Weldability

 Limited, can be welded with special electrodes

Compressive strength

Good

Emergency-running properties

Good

Thermal conductivity

Good

Vibration-absorbing properties

Good

Castability

Very good

Other properties

Structure

Pearlitic

Main uses

Machine tools, gearboxes, machine beds
Recommended wall thicknesses:
up to 30 mm, compressors, hydraulic parts, pumps parts and fitting parts subject to excessive stress, grid plates, subplates