X5CrNi18-10, 1.4301, 304 is a standard "18/8" stainless, has excellent forming and welding characteristics. can be readily braked or roll-formed into a variety of components for applications in the industrial, architectural, and transportation fields. It also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.
| Grade | Chemical composition WT % | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | Si | P | S | Cr | Ni | Mo | Cu | N | |
| X5CrNi18-10, 1.4301 | Max 0.07 | Max 2.0 | Max 1.0 | Max 0.045 | Max 0.015 | 17.5 - 19.5 | 8.0 - 10.5 | - | - | Max 0.11 |
| AISI 304, UNS S30400, TP304 | Max 0.08 | Max 2.0 | Max 1.0 | Max 0.045 | Max 0.030 | 17.5 - 20.0 | 8.0 - 11.0 | - | - | Max 0.10 |
| X2CrNi19-11, 1.4306 | Max 0.03 | Max 2.0 | Max 1.0 | Max 0.045 | Max 0.015 | 18.0 - 20.0 | 10.0 - 12.0 | - | - | Max 0.1 |
| X2CrNi18-9, 1.4307 | Max 0.03 | Max 2.0 | Max 1.0 | Max 0.045 | Max 0.030 | 17.5 - 19.5 | 8.0 - 10.0 | - | Max 1.0 | Max 0.11 |
| AISI 304L, UNS S30403, TP304L | Max 0.03 | Max 2.0 | Max 1.0 | Max 0.045 | Max 0.030 | 17.5 - 20.0 | 8.0 - 13.0 | - | - | Max 0.10 |
| 1.4305, X8CrNiS18-9 | Max 0.10 | Max 2.0 | Max 1.0 | Max 0.045 | 0.15 - 0.35 | 17.0 - 19.0 | 8.0 - 10.0 | - | Max 1.0 | Max 0.11 |
| AISI 303, UNS S30300 | Max 0.15 | Max 2.0 | Max 1.0 | Max 0.20 | >0.15 | 17.0 - 19.0 | 8.0 - 10.0 | - | - | - |
| 1.4303, X4CrNi18-12 | Max 0.06 | Max 2.0 | Max 1.0 | Max 0.045 | Max 0.030 | 17.0 - 19.0 | 11.0 - 13.0 | - | - | Max 0.11 |
| AISI 305, UNS S30500 | Max 0.12 | Max 2.0 | Max 1.0 | Max 0.045 | Max 0.030 | 17.0 - 19.0 | 10.5 - 13.0 | - | - | - |
| 1.4311, X2CrNiN18-10 | Max 0.03 | Max 2.0 | Max 1.0 | Max 0.045 | Max 0.015 | 17.5 - 19.5 | 8.5 - 11.5 | - | - | 0.12 - 0.22 |
| AISI 304LN, UNS S30453 | Max 0.03 | Max 2.0 | Max 1.0 | Max 0.045 | Max 0.030 | 18.0 - 20.0 | 8.0 - 12.0 | - | - | 0.10 - 0.16 |
| 0H18N9 | Max 0.07 | Max 2.0 | Max 0.8 | Max 0.045 | Max 0.030 | 17.0 - 19.0 | 9.0 - 11.00 | - | - | - |
| 00H18N10 | Max 0.03 | Max 2.0 | Max 0.8 | Max 0.045 | Max 0.030 | 17.0 - 19.0 | 10.0 - 12.50 | - | - | - |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50 mm) min | Hardness | |
|---|---|---|---|---|---|
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
| 304L | 485 | 170 | 40 | 92 | 201 |
| 304H | 515 | 205 | 40 | 92 | 201 |
| Properties | Temperatures (℃) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| -196 | -150 | -80 | 50 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | ||
| Tensile strength, Rm (MPa) | >1250 | >1100 | >860 | >494 | >450 | >420 | >400 | >390 | >380 | >380 | >380 | >370 | >360 | >330 | |
| Yield strength, Rp0,2 (MPa) | >300 | >315 | >270 | >190 | >157 | >142 | >127 | >118 | >110 | >104 | >98 | >95 | >92 | >90 | |
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100 °C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-100 °C | 0-315 °C | 0-538 °C | at 100 °C | at 500 °C | |||||
| 304/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
X5CrNi18-10, 1.4301, 304 has good oxidation resistance in intermittent service to 870 °C, and in continuous service to 925 °C. Continuous use of 304 in the 425-860 °C range is not recommended if subsequent aqueous corrosion resistance is important. 304L is more resistant to carbide precipitation and can be heated into this temperature range.
304H has higher strength at elevated temperatures so is often used for structural and pressure-containing applications at temperatures above 500 °C up to about 800 °C (approximate). 304H will become sensitized in the temperature range of 425-860 °C. Whilst this is not a problem for high-temperature applications, it will result in reduced aqueous corrosion resistance.
During Solution Treatment (Annealing) Grade 304 can be heated to 1010-1120 °C and is then cooled rapidly.
Saturation at 1000 - 1100℃
Hot forming at 1200 - 900℃
X5CrNi18-10, 1.4301, 304 has excellent weldability by all standard fusion methods, both with and without filler metals. AS 1554.6 pre-qualifies welding of 304 with Grade 308 and 304L with 308L rods or electrodes (and with their high silicon equivalents). Heavy welded sections in Grade 304 may require post-weld annealing for maximum corrosion resistance. This is not required for Grade 304L. Grade 321 may also be used as an alternative to 304 if heavy section welding is required and post-weld heat treatment is not possible.
A "Ugima" improved machinability version of grade 304 is available in bar products. "Ugima" machines significantly better than standard 304 or 304L, giving higher machining rates and lower tool wear in many operations.
| Grade | Shape | Dimensionmm | Qty.kg |
|---|---|---|---|
| 304LN | Ingot | 730 | 0.117 |
| 304NG | sheet | 7.00*700.00*1250 | 0.594 |
| 304NG | sheet | 7.00*700.00*1250 | 0.792 |
| 304NG | sheet | 7.00*700.00*1250 | 0.79 |
| 304NG | sheet | 16.00*1000.00*1400 | 1.23 |
| 304NG | sheet | 16.00*1000.00*1400 | 0.351 |
| 304NG | sheet | 16.00*1000.00*1400 | 0.703 |
| 304NG | sheet | 16.00*1000.00*1400 | 1.23 |
| 304NG | Round bar | 16 | 0.226 |
| S30432 | Round bar | 100 | 1.445 |
| S30432 | Round bar | 100 | 1.425 |
Steel grade
Special steel