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DIN2391 St52 NBK drag link steel tubes seamless tubes for Automotive industry
EN 10305, Steel tubes for precision applications — Technical delivery conditions, consists of the following
parts:
— Part 1: Seamless cold drawn tubes
— Part 2: Welded cold drawn tubes
— Part 3: Welded cold sized tubes
— Part 4: Seamless cold drawn tubes for hydraulic and pneumatic power systems
— Part 5: Welded cold sized square and rectangular tubes
— Part 6: Welded cold drawn tubes for hydraulic and pneumatic power systems
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 10020:2000, Definition and classification of grades of steel
EN 10021:2006, General technical delivery conditions for steel products
EN 10027-1, Designation systems for steels - Part 1: Steel names
EN 10027-2, Designation systems for steels - Part 2: Numerical system
EN 10052:1993, Vocabulary of heat treatment terms for ferrous products
EN 10168, Steel products - Inspection documents - List of information and description
EN 10204, Metallic products - Types of inspection documents
EN 10266:2003, Steel tubes, fittings and structural hollow sections - Symbols and definitions of terms for
use in product standards
EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical
testing (ISO 377)
EN ISO 2566-1, Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-1)
EN ISO 4287, Geometrical product specifications (GPS) - Surface texture: Profile method - Terms,
definitions and surface texture parameters (ISO 4287)
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature
(ISO 6892-1)
EN ISO 8492, Metallic materials - Tube - Flattening test (ISO 8492)
EN ISO 8493, Metallic materials - Tube - Drift-expanding test (ISO 8493)
EN ISO 10893-1, Non-destructive testing of steel tubes - Part 1: Automated electromagnetic testing of
seamless and welded (except submerged arc-welded) steel tubes for the verification of hydraulic
leaktightness (ISO 10893-1)
The steel tubes chemical composition and Mechanical properties:
| Steel Grade | Chemical Composition | |||||
| Symbol | Material Number | C | Si | Mn | P | S |
| E215 | 1.0212 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| E235 | 1.0308 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| E355 | 1.0580 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
| Steel Grade | BK | BKW | BKS | |||||
| Name | No. | Rm | A | Rm | A | Rm | ReH | A |
| E215 | 1.0212 | 480 | 6 | 420 | 10 | 420 | 315 | 14 |
| E235 | 1.0308 | 580 | 5 | 520 | 8 | 520 | 375 | 12 |
| E355 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 450 | 10 |
| Steel Grade | GBK | NBK | ||||
| Name | No. | Rm | A | Rm | ReH | A |
| E215 | 1.0212 | 315 | 25 | 340--470 | 235 | 25 |
| E235 | 1.0308 | 390 | 21 | 440--570 | 255 | 21 |
| E355 | 1.0580 | 450 | 22 | 490--630 | 355 | 22 |
Cold Drawn Steel Tubes Pictures:
Tags: 38*4.7mm seamless steel tube, drag link steel tube, precision steel tube, DIN2391 St52 NBK, EN10305-1 E355 +N, Cold Drawn Steel Tube