Gradus et Compositio Chemica (%)
| Gradus | C≤ | Si | Mn | P≤ | S≤ | Cr | Mo |
| SCM 420TK | 0.18~ 0.23 | 0.15~ 0.35 | 0.60~ 0.85 | 0.030 | 0.030 | 0.90~ 1.20 | - |
| SCM 415TK | 0.13~ 0.18 | 0.15~ 0.35 | 0.60~ 0.85 | 0.030 | 0.030 | 0.90~ 1.20 | 0.15~ 0.30 |
| SCM 418TK | 0.16~ 0.21 | 0.15~ 0.35 | 0.60~ 0.85 | 0.030 | 0.030 | 0.90~ 1.20 | 0.15~ 0.30 |
| SCM 420TK | 0.18~ 0.23 | 0.15~ 0.35 | 0.60~ 0.85 | 0.030 | 0.030 | 0.90~ 1.20 | 0.15~ 0.30 |
| SCM 430TK | 0.28~ 0.33 | 0.15~ 0.35 | 0.60~ 0.85 | 0.030 | 0.030 | 0.90~ 1.20 | 0.15~ 0.30 |
| SCM 435TK | 0.33~ 0.38 | 0.15~ 0.35 | 0.60~ 0.85 | 0.030 | 0.030 | 0.90~ 1.20 | 0.15~ 0.30 |
| SCM 440TK | 0.38~ 0.43 | 0.15~ 0.35 | 0.60~ 0.85 | 0.030 | 0.030 | 0.90~ 1.20 | 0.15~ 0.30 |
| Nota: 1. Ni ut impuritas in variis tubis ferreis non excedit 0.25%, et Cu non excedit 0.30%;2. Cum emptor analysin producti finiti postulat, deviatio permissa est ut in Tabula 3 normae JIS G0321 specificatur. | |||||||
Fabricatio: fistula sine sutura (calido perfecta et frigido perfecta)
Magnitudo: Diametros exteriores: 15.0~114mm; Pondus: 2~20mm
Gradus: SCM 415TK, SCM 420 TK.
Longitudo: 6M vel longitudo specifica prout requiritur.
Extrema: Extremum Planum, Extremum Oblinatum.
Gradus
Codex methodi fabricationis (Tubus ferreus sine suturis calidus perfectusTubus ferreus sine suturis frigido confecto: SC)
Dimensiones (diameter nominalis X crassitudo parietis nominalis vel diameter externus X crassitudo parietis)
Nomen fabricatoris vel eius nota identificans
-
- Tolerantia OD et WT
Divisio
Tolerantia in OD
Tolerantia in WT
Classis Prima
Dimensionem <50m
±0.5 mm
S <4mm
+0.6mm
-0.5mm
50mm≤D
±1%
S≥4mm
+1% -12.5%
Classis II
Dimensionem <50m
±0.25mm
S <3mm
±0.3mm
50mm≤D
±0.5%
S≥3mm
±10%
Classis III
Dimensionem <25m
±0.12 mm
S <2mm
±0.15mm
40mm > D ≥ 25mm
±0.15 mm
50mm > D ≥ 40mm
±0.18 mm
S≥2mm
±8%
60mm > D ≥ 50mm
±0.20 mm
Nota: Tolerantia in crassitudine cuiusque parietis ad unum locum decimalem rotundanda est secundum regulam JIS Z 8401.
70mm > D ≥ 60mm
±0.23mm
80mm > D ≥ 70mm
±0.25 mm
90mm > D ≥ 80mm
±0.30mm
100mm > D ≥ 90mm
±0.40 mm
D≥100mm
±0.50%
1. Tolerantia diametro externo (OD) tubi chalybis sine suturis calidi confecti secundum Classem 12. Tubi ferrei extincti et temperati secundum quattuor categorias.
- Tolerantia OD et WT










