COMPARISON OF MILD STEEL & AISI 4330 STEEL
Chemical Composition:
MILD STEEL
AISI 4330 STEEL
Carbon
0.16-0.18 %
0.20-0.30 %
Silicon
0.40 % Max
0.80 % Max
Manganese
0.70-090 %
1 % Max
Sulphur
0.04 % Max
0.025 % Max
Phosphorus
0.04 % Max
0.025 % Max
Chromium
0.1 %
0.4-0.6 %
Molybdenum
0.01 %
0.30-0.50 %
Nickel
0.01 %
1-1.5 %
Mechanical Properties:
MILD STEEL
AISI 4330 STEEL
Tensile Strength
400-560 MPa
890 MPa (Min)
Yield Strength
300-440 MPa (Min)
690 MPa (Min)
Elongation
10-14 % Min
15% Min
Brinell Hardness
120
285
0.2 % Proof Stress
280-420 MPa (Min)
-