1.4436, 1.4435, 1.4432 - stainless steel
Austenitic stainless acid-resistant steel 1.4436 / X3CrNiMo17-13-3, 1.4435 / X2CrNiMo18-14-3, 1.4432 / X2CrNiMo17-12-3 according to EN 10088-1.
| Standards | Steel Grades | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | |||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | N: | |||
| EN | 1.4436 - X3CrNiMo17-13-3 | ||||||||||
| <0.05 | <2.0 | <1.0 | <0.045 | <0.015 | 16.5 - 18.5 | 10.5 - 13.0 | 2.5 - 3.0 | <0.10 | |||
| EN | 1.4435 - X2CrNiMo18-14-3 | ||||||||||
| <0.03 | <2.0 | <1.0 | <0.045 | <0.015 | 17.0 - 19.0 | 12.5 - 15.0 | 2.5 - 3.0 | <0.10 | |||
| EN | 1.4432 - X2CrNiMo17-12-3 | ||||||||||
| <0.03 | <2.0 | <1.0 | <0.045 | <0.030 | 16.5 - 18.5 | 10.5 - 13.0 | 2.5 - 3.0 | <0.11 | |||
1.4436, 1.4435, 1.4432 - specification and application
1.4436, 1.4435, and 1.4432 materials are better and more refined equivalents of austenitic 316L steel. The basic difference between grades is the concentration of alloying additives - Nickel, Molybdenum, and Chromium. Each grade has an elevated molybdenum content, which significantly influences the product's chlorides and acids corrosion resistance.
The products in these grades are commonly used in the manufacture of pumps, tanks for chemicals, pipelines and installations, heat exchangers, screws, nuts, special coolers, food, chemical, textile, paper and cryogenic equipment, oil and marine industries that require better properties than the 316L.
Mechanical and physical properties of 1.4436 / X3CrNiMo17-13-3, 1.4435, X2CrNiMo18-14-3 and 1.4432 / X2CrNiMo17-12-3 steels
- Tensile strength, Rm: 500 - 700 MPa
- Yield point, Rp0,2: >200 MPa
- Elongation, A: >40%
- Modulus of elasticity, E: 200 GPa
- Hardness, HB: <215
- Specific resistance, Ω: 0,75 mkOhm * m
- Heat capacity, cp: 500 J * kg-1 * K-1
- Heat conductivity, λ: 15 W * m-1 * K-1
- Linear Expansion Factor, α: 16,0 * 10-6 K-1
Mechanical properties at elevated temperature - 1.4436, X3CrNiMo17-13-3
| Properties | Temperatures ℃ | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | ||
| Yield point, Rp0,2 (MPa) | >175 | >158 | >145 | >135 | >127 | >120 | >115 | >112 | >110 | >108 | |
Mechanical properties at elevated temperatures - 1.4435 / X2CrNiMo18-14-3, and 1.4432, X2CrNiMo17-12-3
| Properties | Temperatures ℃ | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | ||
| Yield point, Rp0,2 (MPa) | >165 | >150 | >137 | >127 | >119 | >113 | >108 | >103 | >100 | >98 | |
Thermo-mechanical treatment 1.4432, 1.4436, 1.4435 - processes and temperatures:
- Hyperquenching of steel at 1020 - 1120 ℃ with cooling in water or air
- Rolling and forging of 1.4435 / 1.4436 steel at 1200 - 900℃
- Rolling and forging of 1.4432 steel at 1150 - 850 °C
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