grade | lzqt 400-18 | lzqt 450-10 | lzqt 500-7 | lzqt 600-3 |
60-40-18 | 65-45-12 | - | 80-55-06 | |
en-gjs-400-18 | en-gjs-450-10 | en-gjs-500-7 | en-gjs-600-3 | |
ggg40 | - | ggg50 | ggg60 | |
fcd400 | fcd450 | fcd500 | fcd600 |
chemical compostition (%) | si | 2.2~2.8 | 2.2~3.2 | 2.2~3.2 | 2.2~3.2 |
mn | 0.1~0.4 | 0.1~0.4 | 0.2~0.5 | 0.3~0.6 | |
p | ≤ 0.05 | ≤ 0.05 | ≤ 0.05 | ≤ 0.05 | |
s | ≤ 0.02 | ≤ 0.02 | ≤ 0.02 | ≤ 0.02 | |
c | 3.2~4.0 | 3.2~3.9 | 3.2~3.9 | 3.0~3.8 | |
mechanical propenrties | yield strength | ≥260 | ≥310 | ≥320 | ≥380 |
mpa tensile strength | 30≤d≤150 ≥380; 150≤d≤450 ≥350 | 30≤d≤150 ≥420; 150≤d≤450 ≥400 | 30≤d≤150 ≥470; 150≤d≤450 ≥420 | 30≤d≤150 ≥560; 150≤d≤450 ≥520 | |
elongation% | 30≤d≤120 ≥18; 125≤d≤600 ≥15 | 30≤d≤120 ≥12; 125≤d≤600 ≥8 | 30≤d≤120 ≥7; 125≤d≤600 ≥5 | 30≤d≤120 ≥3; 125≤d≤600 ≥2 | |
hardness hb | 130~170 | 140~200 | 170~230 | 180~250 | |
shape/size | round | φ18mm~φ600mm | |||
square | □25mm×25mm~□900mm×900mm | ||||
rectangle | 30mm×40mm~360mm×470mm | ||||
semi-round | r30mm~r180mm |