
Material Overview
Stainless Steel 444 (UNS S44400 / EN 1.4521 / JIS SUS444) is a low-carbon, low-nitrogen, dual-stabilized ferritic stainless steel containing 18% chromium and 2% molybdenum. Dual-stabilized with titanium and niobium (columbium), SS 444 provides superior resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking compared to standard ferritic grades (such as 430) and austenitic grades (such as 304).
444 Chemical Composition Specification
| Element | Minimum (%) | Maximum (%) |
| Carbon (C) | 0.025 | |
| Chromium (Cr) | 17.50 | 19.50 |
| Molybdenum (Mo) | 1.75 | 2.50 |
| Nickel (Ni) | 1.00 | |
| Nitrogen (N) | 0.035 | |
| Titanium (Ti) + Niobium (Nb) | 0.20 + 4(C+N) | 0.80 |
| Manganese (Mn) | 1.00 | |
| Silicon (Si) | 1.00 | |
| Phosphorus (P) | 0.040 | |
| Sulfur (S) | 0.030 | |
| Iron (Fe) | Balance | Balance |
Mechanical & Physical Properties
| Property | Metric | Imperial |
| Density | 7.75 g/cm | 0.280 lb/in |
| Melting Range | 1420C to 1510C | 2588F to 2750F |
| Tensile Strength (Annealed) | Min 415 MPa | Min 60 ksi |
| Yield Strength 0.2% (Annealed) | Min 275 MPa | Min 40 ksi |
| Hardness | Max 217 HBW / 95 HRB | Max 217 HBW / 95 HRB |
| Magnetic Nature | Strongly Ferromagnetic | Strongly Ferromagnetic |
444 Scrap Classifications & Characteristics
Types of Scrap: Loose sheet offcuts, pressed bales/bundles, plate end-cuts, stamping scrap, skeleton cuts, turnings/borings, and foundry-grade solids.
Scrap Forms:
Loose Scrap: Unpressed plate cut-offs, punchings, skeleton sheets, and individual structural pieces.
Pressed Scrap: High-density hydraulic-compressed bales or bundles suitable for direct electric arc furnace (EAF) or induction furnace loading.
Foundry Scrap: Heavy, clean, solid pieces free of oil, attachments, non-ferrous contaminants, or lower-grade steel mixing.
Key Sorting Features:
Magnetic Property: Unlike 300-series austenitic stainless (304, 316), Type 444 is fully magnetic, which allows quick magnetic sorting from austenitic alloys.
Molybdenum Content: Must be verified via XRF/PMI analyzer to separate 444 (approx. 2% Mo) from non-moly ferritic grades like 430 or 409.
Key Industry Standards & Specifications
ASTM Standard: ASTM A240 / A240M (Plate, Sheet, and Strip), ASTM A268 (Seamless and Welded Tubing)
ASME Standard: ASME SA240
UNS Designation: UNS S44400 / UNS S44401
EN / W.Nr Standard: 1.4521 / X2CrMoTi18-2
JIS Standard: SUS 444
HS Code: 7204.49 (Stainless Steel Scrap) / 7219.33 (Flat-rolled Stainless Steel)
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