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ISO 185 JL 150 cast iron is grey cast iron in the as-fabricated condition, no temper or treatment. 150 is the ISO 185 numeric designation for this material.
Main Chemistry Composition of ISO 185 JL 150 |
Reference analysis for medium wall thicknesses |
C |
Si |
Mn |
Microstructure |
3.40 – 3.60 |
2.30 – 2.60 |
0.60 – 0.90 |
Pearlite |
As for normal grey iron, the chemical composition is not important comparatively. The iron foundries could adjust the compositions according to their experience as long as they could meet the physical and mechanical requirements.
Technological properties of ISO 185 JL 150 |
Machinability |
Excellent |
Wear resistance |
Average |
Induction or flame-hardening capacity |
Poor |
Nitriding capacity |
Good |
Damping |
Excellent |
Weldability |
Only weldable using special electrodes |
Tensile strength of ISO 185/JL/150 grey cast irons determined on test pieces machined from cast samples
- from ISO 185:2020(E)
Material designation |
Relevant wall
Thickness
t |
Tensile strength
Rm |
in separately cast samples
or side-by-side cast samples |
in cast-on samples |
mm |
MPa |
MPa |
≥ |
≤ |
≥ |
≤ |
≥ |
ISO 185/JL/150 |
2,5 |
5 |
150 |
250 |
- |
5 |
10 |
- |
10 |
20 |
- |
20 |
40 |
125 |
40 |
80 |
110 |
80 |
150 |
100 |
150 |
300 |
90 |
Mechanical properties of ISO 185/JL/150 in separately cast test pieces with 30 mm as-cast diameter
- from ISO 185:2020(E)
Characteristic |
Symbol |
SI-unit |
Material designation |
ISO 185/JL/150 |
Matrix structure |
Ferritic/pearlitic |
Tensile strength |
Rm |
MPa |
150 to 250 |
0,1% proof strength |
Rp0.1 |
MPa |
98 to 165 |
Compression strength |
|
MPa |
600 |
0,1% compression proof strength |
|
MPa |
195 |
Bending strength |
|
MPa |
270 to 455 (1,82 x Rm) |
Shear strength |
|
MPa |
170 |
Torsional strength |
|
MPa |
170 |
Modulus of elasticity |
E |
GPa |
78 to 103 |
Poisson’s ratio |
v |
- |
0,26 |
Bending fatigue strength |
|
MPa |
70 to 115 (0,46 x Rm) |
Fatigue limit under reversed tension-compression stresses |
|
MPa |
50 to 85 (0,34 x Rm) |
Torsional fatigue strength |
|
MPa |
55 to 95 (0,38 x Rm) |
Physical properties of ISO 185/JL/150 in separately cast test pieces with 30 mm as-cast diameter
- from ISO 185:2020(E)
Characteristic |
Symbol |
SI-unit |
Material designation |
ISO 185/JL/150 |
Density |
ρ |
kg/dm3 |
7,10 |
Specific heat capacity
between 20℃ and 200℃ |
c |
J/(kg K) |
460 |
between 20℃ and 600℃ |
535 |
Linear expansion coefficient
between -100℃ and +20℃ |
α |
µm/(m K) |
10,0 |
between 20℃ and 200℃ |
11,7 |
between 20℃ and 400℃ |
13,0 |
Thermal conductivity
at 100℃ |
λ |
W/(m K) |
52,5 |
at 200℃ |
51,0 |
at 300℃ |
50,0 |
at 400℃ |
49,0 |
at 500℃ |
48,5 |
Resistivity |
ρ |
Ω mm2/m |
0,80 |
Coercivity |
HO |
A/m |
560 to 720 |
Maximum permeability at room temperature |
μ |
μH/m |
220 to 330 |
Hysteresis losses at B = 1 T |
|
J/m3 |
2500 to 3000 |
Approximate cross-reference of ISO 185/JL/150 grade designations to other standard grades of grey cast irons
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