JIS G3441 Alloy Steel Tubes for General Structural Purpose
JIS G3441, JIS G3441 SCM415TK, JIS G3441 SCM418TK, JIS G3441 SCM420TK, JIS G3441 SCM430TK, JIS G3441 SCM435TK, JIS G3441 SCM440TK, JIS G3441 SCr420TK, steel tube, steel tubes
JIS G3441 alloy steel tubes are widely used in mechanical structure, natural gas, oil, water transportation, chemical fertilizer equipment with boiler ect.
Application of JIS G3441 alloy steel tubes:
mechanical structure, natural gas, oil, water transportation, chemical fertilizer equipment with boiler, petroleum cracking, geological drilling, oil drilling, etc.
Quality Standard and Steel Grade:
- JIS G3441 SCr420TK
- JIS G3441 SCM415TK
- JIS G3441 SCM418TK
- JIS G3441 SCM420TK
- JIS G3441 SCM430TK
- JIS G3441 SCM435TK
- JIS G3441 SCM440TK
Size range of JIS G3441 Alloy Steel Tubes:
Tolerance on Outside Diameter in JIS G3441
| O.D.(mm) | Tolerance(%) |
| <13 td> | ±0.25 |
| <13-25 | ±0.40 |
| <25-40 | ±0.60 |
| <40-65 | ±0.80 |
| <65-90 | ±1.00 |
| <90-140 | ±1.20 |
| <140 | By agreement |
Tolerance on Wall Thickness in JIS G3441
| W.T.(mm) | Tolerance |
| < td> | -0.5,+0.6 |
| <4 | -12.5%, +15% |
How to test JIS G3441 Alloy Steel Tubes:
- Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation)
- Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc)
- Exterior Size Inspection.
- Mill Test Certificate:EN 10204/3.1B
- Delivery Condition:BKS, NBK,BK ,BKW, GBK(+A), NBK(+N), BK(+C)
JIS G3441 Alloy Steel Tubes Chemical composition Limits(%)
| Steel grade | Steel grade(old) | C | Si | Mn | P | S | Cr | Mo |
| SCr420TK | – | 0.18~0.23 | 0.15~0.35 | 0.60~0.85 | <0 td> | <0 td> | 0.90~1.20 | 0.15~0.30 |
| SCM415TK | – | 0.13~0.18 | 0.15~0.35 | 0.60~0.85 | <0 td> | <0 td> | 0.90~1.20 | 0.15~0.30 |
| SCM418TK | – | 0.16~0.21 | 0.15~0.35 | 0.60~0.85 | <0 td> | <0 td> | 0.90~1.20 | 0.15~0.30 |
| SCM420TK | – | 0.18~0.23 | 0.15~0.35 | 0.60~0.85 | <0 td> | <0 td> | 0.90~1.20 | 0.15~0.30 |
| SCM430TK | As STKS1 | 0.33~0.38 | 0.15~0.35 | 0.60~0.85 | <0 td> | <0 td> | 0.90~1.20 | 0.15~0.30 |
| SCM435TK | As STKS3 | 0.33~0.38 | 0.15~0.35 | 0.60~0.85 | <0 td> | <0 td> | 0.90~1.20 | 0.15~0.30 |
| SCM440TK | – | 0.38~0.43 | 0.15~0.35 | 0.60~0.85 | <0 td> | <0 td> | 0.90~1.20 | 0.15~0.30 |
Packing:
- Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips
- Two tags on each bundle
- Wrapped in waterproof paper
- PVC sleeve, and sackcloth with several steel strips
