Major Categories of Common Valve Materials (2)
Column：Valve Selection Guide
Time：2018-01-24
| Chemical Composition | ||||||||||
| Grade | C(Max) | Si(Max) | Mn(Max) | P(Max) | S(Max) | Cr | Mo | Ni | N(Max) | |
| 304L | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 18.00/20.00 | - | 8.00/13.00 | 0.10 | |
| 304 | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 18.00/20.00 | - | 8.00/11.00 | 0.10 | |
| Chemical Properties | ||||||||||
| Grade | Yield Strength Min (Mpa) | Tensile Strength Min (Mpa) | Elongation(%) Min | Reduction of Area(%) Min (50mm) | Hardness Max | |||||
| HB | HRB | |||||||||
| 304L | 170 | 485 | 30 | 50 | 201* | 92* | ||||
| 304 | 205 | 515 | 30 | 50 | 201* | 92* | ||||
| *Maximum hardness not specified in ASTM A182/A182M-13 | ||||||||||
| Applications | ||||||||||
| FORGING SPECIFICATION | COMMON DESIGNATION | MATERIAL SUFFIX | WROUGHT BAR SPECIFICATION | SERVICE RECOMMENDATIONS(1) | COMMON API TRIM# FOR BASE MATERIAL | |||||
| 150 TO 600# | 900 TO 2500# | |||||||||
| ASTM A182 F304 | 18% Chrome; 8% Nickel; 0.08% C Stainless Steel | AS T M A351 Grade CF8 | ASTM A479 304 | Corrosive or extremely high temperature non-corrosive services between -450ºF (-268ºC) and +1200ºF (+649ºC). Above +800ºF (+425ºC) specify carbon content of 0.04% or greater. | 2 | 2, 15 | ||||
| ASTM A182 304L | 18% Chrome; 8% Nickel; 0.03% C Low Carbon Stainless Steel | ASTM A 351 Grade CF3 | ASTM A479 304L | Brackish water, phosphate solutions, pressurised water @ 570ºF (299ºC), sea water, steam. | 304L+HFS | 304L+HF | ||||
| ASTM A182 F304H | 18% Chrome; 8% Nickel; 0.08% C Stainless Steel | AST M A351 Grade CF10 | ASTM A479 304H | Corrosive or extremely high temperature non-corrosive services between -450ºF (-268ºC) and +1200ºF (+649ºC). Above +800ºF (+425ºC) specify carbon content of 0.04% or greater. | 304H+HFS | 304H+HF | ||||
