Chromed tube
Product Details
| Specifications: | |||||
| Material: | 20# 45# 16Mn 27SiMn ST52 | ||||
| Standard: | GB/T87138-88 GB/T3636-2000 DIN2391 EN10305 | ||||
| Straightness: | 0.3–0.8mm/m | ||||
| Roughness (Ra): | 0.2 to 0.8 um | ||||
| Tolerance: | ISO H7,H8,H9 | ||||
| Conservation: | Anti rust oiled both inside and outside surface, plastic caps in both ends | ||||
| Chemical Composition(%): | |||||
| Grade | C(max) | Si(max) | Mn | P | S(max) |
| ST35 | 0.17 | 0.35 | >=0.40 | 0.025 | 0.025 |
| ST42 | 0.21 | 0.35 | >=0.40 | 0.025 | 0.025 |
| ST52 | 0.22 | 0.55 | <=1.60 | 0.025 | 0.025 |
| Mechanical Properties: | |||||
| Steel | Tensile strength | Yield | Elongation | Hardness HB | |
| 20# | 530 | 505 | 12 | 175 | |
| 45# | 660 | 630 | 9 | 190 | |
| 16Mn | 595 | 575 | 9 | 190 | |
| 27SiMn | 840 | 805 | 7.5 | 230 | |
| Product Description: | |||||
| Processing form | I.D | Length | Straightness | I.D Tolerance | I.D Roughness |
| Cold-rolled | 20-100 | <=10m | 0.3-1.0 | H7-H9 | 0.4-1.6 |
| Cold-drawn | 76-245 | <=12m | 0.3-1.0 | H7-H9 | 0.8-1.6 |
| Honed | 40-180 | <=7m | 1000 | H7-H9 | 0.4-0.8 |
| SRB | 63-180 | <=7m | 1000 | H7-H8 | 0.1-0.4 |