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| Place of Origin | Changzhou |
| Brand Name | Joyruns |
| Certification | ISO9001 |
| Model Number | 20*2 |
DIN 2393 Standard applies to welded precision steel tubes, and in compliance with ISO/DIS 3304.DIN 2393 Precision Welded Steel Tubes is used for Auto and motorcycle shock absorber, Gas spring, Hydraulic system steel tube, Electric industry, Construction machinery, Heat exchanger and condenser.
Material:St28,St34.2,St37.2,St44.2,St52.3
Surface:Polished,brightness,metallic color
Size:OD 6mm-65mm,WT 1-8mm
Length: Random 10-6000mm, custom-made as well
Tolerance:+/-0.05mm.special tolerance:+/-0.03mm
Grade and chemical composition
| GRADE | C max | Si max | Mn min | P max | S max | Ni | Cr |
| St52.3 | 0.22 | 0.55Max | 1.60Min | 0.040 | 0.040 | ||
| St28 | 0.13 | 0.50 | 0.50 | ||||
| St34.2 | 0.15 | 0.50 | 0.50 | ||||
| St37.2 | 0.17 | 0.50 | 0.50 | ||||
| St44.2 | 0.21 | 0.50 | 0.50 |
Grade and comparison
| DIN Norms:DIN 2393 | EN Norms:EN 10305-2 | UNI Norms:UNI 7946 |
| RSt 34.2 | E195 | Fe320 |
| RSt 37.2 | E235 | Fe360 |
| St 52.3 | E355 | Fe490 |
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