General Characteristics
444/1.4521 is a nickel-free, molybdenum alloyed ferritic stainless steel with very good corrosion resistance, good cold formability, and high strength. 444/1.4521 allows for thinner walls in tanks and is not prone to stress-corrosion cracking.
444/1.4521 is a 2% molybdenum-alloyed ferritic stainless steel with medium chromium that can be used in many corrosive environments. As a ferritic stainless steel, it has high resistance to chloride-induced stress corrosion cracking. Because of its titanium alloying, 444/1.4521 can be welded in all dimensions without becoming susceptible to intergranular corrosion.
Typical Applications
Hot water tanks
Drinking water pipes
Chemical Composition
The chemical composition may vary slightly between different product standards. The required standard will be fully met as specified on the order.
The typical chemical composition for this grade is given in the table below, together with composition limits given for the product according to different standards. The required standard will be fully met as specified on the order.
The chemical composition is given as % by mass.
| C | Mn | Cr | Ni | Mo | N | |
Typical | 0.02 | 18.0 | 2.0 | |||
ASTM A240 | ≤0.025 | ≤1.00 | 17.5-19.5 | ≤1.00 | 1.75-2.50 | ≤0.035 |
EN 10028-7 | ≤0.025 | ≤1.00 | 17.00-20.00 | 1.80-2.50 | ≤0.030 | |
EN 10088-2 | ≤0.025 | ≤1.0 | 17.0-20.0 | 1.8-2.5 | ≤0.030 | |
EN 10088-4 | ≤0.025 | ≤1.0 | 17.0-20.0 | 1.8-2.5 | ≤0.030 | |
IS 6911 | ≤0.025 | ≤1.00 | 17.5-19.5 | ≤1.00 | 1.75-2.50 | ≤0.035 |
Mechanical Properties
The mechanical properties of the available products are given in the table below.
| Standard | Rp0.2 | Rp1.0 | Rm | Elongation | Rockwell | HB |
MPa | MPa | MPa | % | |||
Product type: Cold rolled coil and sheet | ||||||
Typical (thickness 1 mm) | 350 | 370 | 525 | 50 | ||
ASTM A240 | ≥ 275 | ≥ 415 | ≤ 96HRB | ≤ 217 | ||
EN 10028-7 | ≥ 320 | 420-640 | ≥ 20 | |||
EN 10088-2 | ≥ 300 | 420-640 | ≥ 20 | |||
EN 10088-4 | ≥ 300 | 420-640 | ||||
IS 6911 | ≥ 275 | ≥ 415 | ≤ 96HRB | ≤ 217 | ||
Product type: Hot rolled coil and sheet | ||||||
Typical (thickness 4 mm) | 380 | 420 | 450 | 32 | 85 | |
ASTM A240 | ≥ 275 | ≥ 415 | ≤ 217 | |||
EN 10088-2 | ≥ 280 | 400-600 | ≥ 20 | |||
EN 10088-4 | ≥ 280 | 400-600 | ||||
IS 6911 | ≥ 275 | ≥ 415 | ≤ 96HRB | ≤ 217 | ||
Product type: Hot rolled quarto plate | ||||||
Typical (thickness 15 mm) | 360 | 400 | 540 | 26 | ||
ASTM A240 | ≥ 275 | ≥ 415 | ≤ 217 | |||
EN 10028-7 | ≥ 300 | 420-620 | ||||
EN 10088-2 | ≥ 280 | 420-620 | ≥ 20 | |||
EN 10088-4 | ≥ 300 | 420-620 | ||||
IS 6911 | ≥ 275 | ≥ 415 | ≤ 96HRB | ≤ 217 | ||
1)Elongation according to EN standard: A80 for thickness below 3 mm. A for thickness = 3 mm. Elongation according to ASTM standard A2” or A50.
Physical Properties
Data according to EN 10088
| Density | Modulus of elasticity | Thermal exp. at 100 °C | Thermal conductivity | Thermal capacity | Electrical resistance | Magnetizable |
kg/dm3 | GPa | 10-6/°C | W/m°C | J/kg°C | µΩm | |
7.7 | 220 | 10,4 | 23 | 430 | 0.80 | Yes |
