Field of Application
This JIS G3467 standard specifies the technical requirements for pipes manufactured from carbon steel, low-alloy steel, high-alloy stainless steel, as well as nickel, chromium, and iron-based alloys. These products, supplied by EV Group China, are designed for use in tube furnaces employed for heating process media in petrochemical synthesis and hydrocarbon feedstock deep processing.
Note: Upon preliminary agreement with the customer, pipes may be subjected to additional tests and quality inspections provided by the standard’s appendices:
- Z2: Determination of yield strength at elevated temperatures.
- Z3: Ultrasonic testing (UT).
- Z4: Eddy current testing for defects.
- Z6: Corrosion resistance testing.
All physical and mechanical values are provided in accordance with the International System of Units (SI).
Mechanical Properties of Steels
| Steel Grade | Finishing Method | Tensile Strength (N/mm²), min. | Yield Strength (N/mm²), min. | Elongation (%), min. | |||
|---|---|---|---|---|---|---|---|
| Specimens No. 11 and No. 12 | Specimen No. 4 | ||||||
| Longitudinal | Transverse | Longitudinal | Transverse | ||||
| STF410 | – | 410 | 245 | 25 | 20 | 24 | 19 |
| STFA 2 | – | 380 | 205 | 30 | 25 | 24 | 19 |
| STFA 3 | – | 410 | 205 | 30 | 25 | 24 | 19 |
| STFA 4 | – | 410 | 205 | 30 | 25 | 24 | 19 |
| STFA 5 | – | 410 | 205 | 30 | 25 | 24 | 19 |
| STFA 6 | – | 410 | 205 | 30 | 25 | 24 | 19 |
| SUS304TF | – | 520 | 205 | 35 | 25 | 30 | 22 |
| SUS304HTF | – | 520 | 205 | 35 | 25 | 30 | 22 |
| SUS309TF | – | 520 | 205 | 35 | 25 | 30 | 22 |
| SUS310TF | – | 520 | 205 | 35 | 25 | 30 | 22 |
| SUS316HTF | – | 520 | 205 | 35 | 25 | 30 | 22 |
| SUS321TF | – | 520 | 205 | 35 | 25 | 30 | 22 |
| SUS321HTF | – | 520 | 205 | 35 | 25 | 30 | 22 |
| SUS347TF | – | 520 | 205 | 35 | 25 | 30 | 22 |
| SUS347HTF | – | 520 | 205 | 35 | 25 | 30 | 22 |
| NCF800TF | Cold finished | 520 | 205 | 30 | – | – | – |
| Hot finished | 450 | 175 | 30 | – | – | – | |
| NCF800HTF | – | 450 | 175 | 30 | – | – | – |