SFVC2A
JPApproximate matchJIS · JIS G3202
Unalloyed carbon steel used for forged pressure piping components (flanges, fittings, valve bodies) in ambient to moderately elevated temperature service. It's the most common item in industrial carbon-steel piping bills of materials, serving as the baseline reference before selecting an alloy steel for more severe service (high temperature, low temperature, corrosive media).
| Grade | Region | Standard | Re (MPa) | Rm (MPa) | Delta |
|---|---|---|---|---|---|
| SFVC2A | JP | JIS G3202 | 245 | 490–640 | reference |
| P245GH (1.0352) | EU | EN 10222-2 | 245 | 410–530 | 0% |
| SFVC2A | KR | KS D 4122 | 245 | 490–637 | 0% |
| A105 | US | ASTM A105/A105M (ASME SA-105) | 250 | ≥485 | +2% |
| Grade | C | Mn | Si | P | S |
|---|---|---|---|---|---|
| SFVC2A | ≤0.35 | 0.4–1.1 | ≤0.35 | ≤0.03 | ≤0.03 |
| P245GH (1.0352) | 0.08–0.2 | 0.5–1.3 | ≤0.4 | ≤0.025 | ≤0.015 |
| SFVC2A | ≤0.35 | 0.4–1.1 | ≤0.35 | ≤0.03 | ≤0.03 |
| A105 | ≤0.35 | 0.6–1.05 | 0.1–0.35 | ≤0.035 | ≤0.04 |
Note: Correction to the original brief: the best-corroborated JIS designation for A105 is SFVC2A, not SFVC1 as initially suggested. A widely circulated ASTM/KS/JIS/DIN cross-reference table from distributors (also used to verify this batch) explicitly links A105 (UNS K03504) to SFVC2A/JIS G3202, with DIN equivalent 19Mn5 (1.0482); SFVC2A's mechanical values (Rp0.2 ≥245 MPa, Rm 490-640 MPa) are very close to A105's (250 MPa / 485 MPa min), which corroborates the equivalence. SFVC1, often incorrectly cited as A105's equivalent, actually corresponds to ASTM A181 Class 60 ("forgings for general piping", a less demanding application with lower mechanical strength — tensile ~400 MPa). JIS G3202 covers both pressure-vessel forgings and, in commercial practice, forged piping components (flanges/fittings).
Values compiled from public sources for guidance only — always verify against the official standard before use in design or fabrication.