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ISO 185 JL 200 has limited strength and wear resistance than other cast iron grades. However, it has good noise and vibration damping combined with excellent machineability. So it is suited for standard cast iron applications, such as moulds, stove parts, and bearings.
Chemical Components of ISO 185 JL 200
Carbon (C): 3.2-3.5%
Silicon (Si): 2.0-2.5%
Manganese (Mn): 0.6-0.8%
Phosphorus (P): 0.4% max
Sulfur (S): 0-0.15%
All values are % weight. Ranges represent what is permitted under applicable standards. The iron foundries can adjust the chemical components according to their own experience.
Technological properties of ISO 185 JL 200 |
Machinability |
Excellent |
Wear resistance |
Good |
Induction or flame-hardening capacity |
Low |
Nitriding capacity |
Good |
Damping |
Excellent |
Weldability |
Only weldable using special electrodes |
Mechanical properties of ISO 185/JL/200 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/200 |
Matrix structure |
Ferritic/pearlitic |
Tensile strength |
Rm |
MPa |
200 to 300 |
0,1% proof strength |
Rp0.1 |
MPa |
130 to 195 |
Compression strength |
|
MPa |
720 |
0,1% compression proof strength |
|
MPa |
260 |
Bending strength |
|
MPa |
345 to 520 (1,73 x Rm) |
Shear strength |
|
MPa |
230 |
Torsional strength |
|
MPa |
230 |
Modulus of elasticity |
E |
GPa |
88 to 113 |
Poisson’s ratio |
v |
- |
0,26 |
Bending fatigue strength |
|
MPa |
90 to 140 (0,46 x Rm) |
Fatigue limit under reversed tension-compression stresses |
|
MPa |
70 to 100 (0,34 x Rm) |
Torsional fatigue strength |
|
MPa |
75 to 115 (0,38 x Rm) |
Physical properties of ISO 185/JL/200 in separately cast test pieces with 30 mm as-cast diameter - from ISO 185:2020(E)
Characteristic |
Symbol |
SI-unit |
Material designationa |
ISO 185/JL/200 |
Density |
ρ |
kg/dm3 |
7,15 |
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) |
50,0 |
at 200℃ |
49,0 |
at 300℃ |
48,0 |
at 400℃ |
47,0 |
at 500℃ |
46,0 |
Resistivity |
ρ |
Ω mm2/m |
0,77 |
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/200 grade designations to other standard grades of grey cast irons - from ISO 185:2020(E)
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