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ISO 185 JL 350 cast iron is a grey iron with good machinability and excellent surface finish.
ISO 185 JL 350 grey iron has good compressive strength and also good noise and vibration damping. The graphite offers lubricating properties which has advantages in sliding wear applications.
Chemical Components of ISO 185 JL 350
Gray Iron Casting, no any standard mentioned the chemistry composition, so we only suggest the following chemistry based on actual production.
Carbon 3.1% max
Silicon 1.4-1.6%
Mangenese 0.7-0.9%
Sulphur 0.10% max
Phosphorous 0.10% max
Molybdenum 0.3-0.5%
Cu or Ni 1.0-1.5%
Mechanical properties of ISO 185/JL/350 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/350 |
Matrix structure |
pearlitic |
Tensile strength |
Rm |
MPa |
350 to 450 |
0,1% proof strength |
Rp0.1 |
MPa |
228 to 285 |
Compression strength |
|
MPa |
1080 |
0,1% compression proof strength |
|
MPa |
455 |
Bending strength |
|
MPa |
540 to 690 (1,54 x Rm) |
Shear strength |
|
MPa |
400 |
Torsional strength |
|
MPa |
400 |
Modulus of elasticity |
E |
GPa |
123 to 143 |
Poisson’s ratio |
v |
- |
0,26 |
Bending fatigue strength |
|
MPa |
160 to 205 (0,46 x Rm) |
Fatigue limit under reversed tension-compression stresses |
|
MPa |
120 to 155 (0,34 x Rm) |
Torsional fatigue strength |
|
MPa |
135 to 170 (0,38 x Rm) |
Physical properties of ISO 185/JL/350 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/350 |
Density |
ρ |
kg/dm3 |
7,30 |
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) |
45,5 |
at 200℃ |
44,5 |
at 300℃ |
43,5 |
at 400℃ |
42,0 |
at 500℃ |
41,5 |
Resistivity |
ρ |
Ω mm2/m |
0,67 |
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/350 grade designations to other standard grades of grey cast irons - from ISO 185:2020(E)
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