Precision Steel Pipe, Precision Steel Tube
Standard: EN 10305-1, DIN2391
Steel grade: E215, E235, E355, E255, E410, ST37, ST45, ST52
Size: OD (4-320mm) x WT (0.5-15mm)
Application: Used in hydraulic system, automobile, locomotive and military industry.
Delivery Conditions:
+C (BK): Glossy hard;
+LC (BKW): Glossy soft;
+SR (BKS): Glossy soft (tempered);
+A (GBK): Without scale, soft;
+N (NBK): Normalized
OD Tolerance | 4-30mm | 31-40mm | 41-50mm | 51-60mm | 61-70mm | 71-80mm | 81-90mm | 91-100mm |
| ±0.08mm | ±0.15mm | ±0.20mm | ±0.25mm | ±0.30mm | ±0.30mm | ±0.40mm | ±0.45mm | |
| WT Tolerance | ±10% | |||||||
| Chemical Composition | ||||||||
| Grade | C | Si | Mn | P | S | Al Min | V | Others |
| E215 | ≤0.1 | ≤0,05 | <0.70 | ≤0,025 | ≤0,025 | 0,025 | - | - |
| E235 | ≤0,17 | ≤0,17 | <1,20 | ≤0,025 | ≤0,025 | - | - | - |
| E355 | ≤0,22 | ≤0,55 | <1,60 | ≤0,025 | ≤0,025 | - | - | - |
| E255 | ≤0,21 | ≤0,35 | 0,40-1,10 | ≤0,025 | ≤0,025 | - | - | - |
| E410 | 0,16-0,22 | 0,10-0,50 | 1,30-1,70 | ≤0.03 | ≤0.035 | 0,010-0,060 | 0,08-0,15 | Nb<0,07; Ti<0,05 |
| Grade | Mechanical properties (Minimal) | |||||||||||
| +C | +LC | +SR | +A | +N | ||||||||
| R m | A% | R m | A% | R m | R eH | A% | R m | A% | R m | R eH | A% | |
| MPa | MPa | MPa | MPa | MPa | Mpa | Mpa | ||||||
| E215 | 430 | 8 | 380 | 12 | 380 | 280 | 16 | 280 | 30 | 290 - 430 | 215 | 30 |
| E235 | 480 | 6 | 420 | 10 | 420 | 350 | 16 | 315 | 25 | 340 - 480 | 235 | 25 |
| E355 | 640 | 4 | 580 | 7 | 580 | 450 | 10 | 450 | 22 | 490 - 630 | 355 | 22 |
| E255 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440 - 570 | 255 | 21 |
| E410 | 750 | 4 | 620 | 8 | 690 | 590 | 12 | 520 | 22 | 550- 700 | 410 | 22
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