ASTM A351 CF3M
UNS J92800ASTM A351 CF3M material
Key Engineering Metrics
Instant specifications summary for ASTM A351 CF3M
General Specifications & Standard Data
ASTM A351Minimum Design Metal Temperature rules for impact testing exemption under ASME B31.3 paragraph 323.2.2.
Mechanical Properties
Room Temp (20°C / 68°F)Allowable Stress Data (ASME B31.3 Table A-1)
asme-bpvcAllowable Stress vs Temperature
ASME B31.3 / BPVC Section II Part D Reference Curve
| Temperature (°C) | Allowable Stress (MPa) | % of Room Temp Rating |
|---|---|---|
| 38 | 137.9 | 100% |
| 100 | 137.2 | 100% |
| 150 | 133.8 | 97% |
| 200 | 132.4 | 96% |
| 250 | 124.8 | 91% |
| 300 | 119.3 | 86% |
| 350 | 113.8 | 82% |
| 400 | 110.3 | 80% |
| 450 | 108.2 | 79% |
| 500 | – | – |
| 550 | – | – |
| 600 | – | – |
| 650 | – | – |
🛡️ ASME B16.5 Flange P-T Ratings & Calculator
Material Group 2.2 (Stainless steel materials)
| Temp (°C) | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
|---|---|---|---|---|---|---|---|
| -29 to 38 | 19 | 49.6 | 66.2 | 99.3 | 148.9 | 248.2 | 413.7 |
| 50 | 18.4 | 48.1 | 64.2 | 96.2 | 144.3 | 240.6 | 400.9 |
| 100 | 16.2 | 42.2 | 56.3 | 84.4 | 126.6 | 211 | 351.6 |
| 150 | 14.8 | 38.5 | 51.3 | 77 | 115.5 | 192.5 | 320.8 |
| 200 | 13.7 | 35.7 | 47.6 | 71.3 | 107 | 178.3 | 297.2 |
| 250 | 12.1 | 33.4 | 44.5 | 66.8 | 100.1 | 166.9 | 278.1 |
| 300 | 10.2 | 31.6 | 42.2 | 63.2 | 94.9 | 158.1 | 263.5 |
| 325 | 9.3 | 30.9 | 41.2 | 61.8 | 92.7 | 154.4 | 257.4 |
| 350 | 8.4 | 30.3 | 40.4 | 60.7 | 91 | 151.6 | 252.7 |
| 375 | 7.4 | 29.9 | 39.8 | 59.8 | 89.6 | 149.4 | 249 |
| 400 | 6.5 | 29.4 | 39.3 | 58.9 | 88.3 | 147.2 | 245.3 |
| 425 | 5.5 | 29.1 | 38.9 | 58.3 | 87.4 | 145.7 | 242.9 |
| 450 | 4.6 | 28.8 | 38.5 | 57.7 | 86.5 | 144.2 | 240.4 |
| 475 | 3.7 | 28.7 | 38.2 | 57.3 | 86 | 143.4 | 238.9 |
| 500 | 2.8 | 28.2 | 37.6 | 56.5 | 84.7 | 140.9 | 235 |
| 538 | 1.4 | 25.2 | 33.4 | 50 | 75.2 | 125.5 | 208.9 |
| 550 | – | 25 | 33.3 | 49.8 | 74.8 | 124.9 | 208 |
| 575 | – | 24 | 31.9 | 47.9 | 71.8 | 119.7 | 199.5 |
| 600 | – | 19.9 | 26.5 | 39.8 | 59.7 | 99.5 | 165.9 |
| 625 | – | 15.8 | 21.1 | 31.6 | 47.4 | 79.1 | 131.8 |
| 650 | – | 12.7 | 16.9 | 25.3 | 38 | 63.3 | 105.5 |
| 675 | – | 10.3 | 13.8 | 20.6 | 31 | 51.6 | 86 |
| 700 | – | 8.4 | 11.2 | 16.8 | 25.1 | 41.9 | 69.8 |
| 725 | – | 7 | 9.3 | 14 | 21 | 34.9 | 58.2 |
| 750 | – | 5.9 | 7.8 | 11.7 | 17.6 | 29.3 | 48.9 |
| 775 | – | 4.6 | 6.2 | 9 | 13.7 | 22.8 | 38 |
| 800 | – | 3.5 | 4.8 | 7 | 10.5 | 17.4 | 29.2 |
| 816 | – | 2.8 | 3.8 | 5.9 | 8.6 | 14.1 | 23.8 |
Working pressures are in gauge (bar). Values interpolated linearly for intermediate temperatures per ASME B16.5 para. 2.3.
Chemical Composition (% Weight)
Heat & Product Analysis🛡️ Service Compatibility
Mo addition (2-3%) provides superior resistance to acetic, phosphoric, and dilute sulfuric acids.
Maintains excellent notch toughness down to -196°C (-320°F).
Standard for aggressive boiler condensate, WFI, and clean steam lines.
Higher PREN (~25) provides good resistance to marine splash & brackish water.
Risk of CSCC above 60°C in high-chloride solutions. Use Duplex for severe hot chlorides.
🔥 Welding & Heat Treatment
None required (ambient ≥ 10°C). Interpass temperature must be strictly controlled < 150°C (300°F) to prevent heat tint & carbide precipitation.
PWHT is not recommended or required; causes chromium carbide sensitization. Full solution annealing at 1040°C + rapid quench if required.
Exempt down to -196°C (-320°F) per ASME B31.3 Table 323.2.2 for base metal & filler metal.
🔗 Material Equivalents
Material property data provided is for preliminary engineering reference. Always verify properties against the latest ASME BPVC Section II, ASTM material specification, and Material Test Report (MTR/MTC).