Audited Supplier
Popular standard and steel grade:
EN10305-1 | E355 E235 E410 E470 C45E |
DIN2391-1 | ST52 ST45 ST52.3 |
ASTM A519 | SAE1020 SAE1045 SAE1026 |
GB/T | 20# 45# 16Mn Q345B Q345D Q345E 42CrMo 27SiMn |
Application: hydraulic cylinder, pneumatic cylinder,Jack, cylinder barrel,and and all pipes have requirement for tolerance.
Manufacture Method: hot rolled and then cold drawn.
Heat Treating Method/Delivery Condition:
BK | BKS | GBK | NBK | Q+T |
+C | +SR | +A | +N | Q+T |
Cold drawn | Stress relieved | Annealed | Normalized | QUENCHED + TEMPERED |
Parameters:
Manufacture method | Cylinder ID (mm) | Length (m) | Straightness (mm/m) | Tolerance on ID | Roughness (μm) |
Cold drawn | 40-420 | ≤16M | 0.2-0.5 | Depends on requirement | 0.8-1.6 |
cold drawn- honed | 40-420 | 12M | 0.2-0.3 | H8-H9 | 0.2-0.8 |
Cold drawn-skived & burnished | 40-420 | 9M | 0.2-0.3 | H8-H9 | ≤0.4 |
Mechanical property:
Final Supply Condition | Cold finished (Hard)(BK) | Cold drawn and stress-relieved (BK+S or + SR) | Hardness HB | |||
Parameters | T.S obN/mm2 | Elongation δ5% | T.S obN/mm2 | Y.S OsN/mm2 | Elongation δ5% | |
20# (A106B, ST45, E255) | >=550 | >=8 | >=520 | >=375 | >=12 | 175 |
45#(CK45) | >=650 | >=5 | >=600 | >=500 | >=10 | 190 |
Q345B(ST52, E355) | >=640 | >=5 | >=600 | >=520 | >=15 | 190 |
25Mn | >=640 | >=5 | >=600 | >=510 | >=15 | 195 |
27SiMn | >=840 | >=5 | >=760 | >=610 | >=10 | 220 |
Chemical Properties:
Material | C% | Mn% | Si% | S% | P% |
20# | 0.17-0.23 | 0.35-0.65 | 0.17-0.37 | ≤0.035 | ≤0.035 |
ST45 | ≤0.21 | ≥0.4 | ≤0.35 | ≤0.025 | ≤0.025 |
E255 | ≤0.21 | 0.4-1.1 | ≤0.35 | ≤0.025 | ≤0.025 |
45# | 0.42-0.50 | 0.50-0.80 | 0.17-0.37 | ≤0.035 | ≤0.035 |
Q345B | ≤0.20 | ≤1.70 | ≤0.50 | ≤0.035 | ≤0.035 |
E355 | ≤0.22 | ≤1.6 | ≤0.55 | ≤0.025 | ≤0.025 |
ST52 | ≤0.22 | ≤1.6 | ≤0.55 | ≤0.04 | ≤0.04 |
25Mn | 0.22-0.29 | 0.70-1.0 | 0.17-0.37 | ≤0.035 | ≤0.035 |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | ≤0.035 | ≤0.035 |
Part of size list (ID*OD)
40*50 | 100*127 | 240*273 | ||
40*55 | 110*130 | 250*266 | ||
50*60 | 120*140 | 250*280 | ||
50*63 | 120*145 | 250*300 | ||
60*70 | 125*140 | 280*323 | ||
60*73 | 125*145 | 280*325 | ||
63*73 | 140*165 | 300*320 | ||
63*76 | 140*168 | 300*356 | ||
70*80 | 150*180 | 320*340 | ||
70*82 | 160*184 | 320*356 | ||
70*85 | 160*194 | 320*370 | ||
80*90 | 170*200 | 350*370 | ||
80*92 | 180*210 | 400*420 | ||
80*95 | 200*216 | |||
80*100 | 200*220 | |||
90*102 | 200*232 | |||
90*105 | 200*245 | |||
100*114 | 220*250 | |||
100*121 | 220*273 |
