Fastening Railway Supplies Rail Clamps Crane Rail Clip From China, Find details about China Railway Fastening System, Forged Rail Shoulder from Fastening Railway Supplies Rail Clamps Crane Rail Clip From China
Application | UIC54 | UIC60 | 115RE, ,50kg rail, 60kg rail, BS80lbs, BS100lbs, ect. |
Name | QT500-7 | QT450-10 | QT400-15 |
Standard | GB 1348-88 | GB 1348-88 | GB 1348-89 |
Chemical composition(%) | C:3.60-3.80 | C:3.40-3.90 | C:3.50-3.60 |
C:3.60-3.80 | Mn:0.2-0.5 | Mn:≤0.5 | |
Si:2.50-2.90 | Si:2.70-3.00 | Si:3.0-3.2 | |
P:≤0.08 | P:≤0.07 | P:≤0.07 | |
S:≤0.025 | S:≤0.03 | S:≤0.02 | |
Tensile Strength | ≥500 Mpa | ≥450 Mpa | ≥400 Mpa |
Yield Strength | ≥320 Mpa | ≥310 Mpa | ≥250 Mpa |
Elongation(%) | ≥7 | ≥10 | ≥15 |
Hardness | 170~230HB | 160~210HB | 130~180HB |
Metallographic organization | ferrite & pearlite | graphite & ferrite & pearlite | ferrite |