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UNS S44020 Details
UNS S44020 Standard Download
S44020 Application:S44020
| Category | Type | Grade | Designations |
|---|---|---|---|
| Grades | Stainless Steels | S44020 | USA - UNS , |
Chemical composition(wt.%) of S44020 grade:
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.95 | 1.2 | ||
| Si | - | 1 | ||
| Mn | - | 1.25 | ||
| P | - | 0.04 | ||
| S | 0.1 | 0.35 | ||
| Cr | 16.0 | 18.0 | ||
| Ni | - | 0.75 | ||
| Mo | 0.40 | 0.60 | ||
| N | - | 0.08 |
Mechanical properties of grade S44020
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 645 (≥) | 275 (≥) | 23 | 13 | 41 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 423 |
Physical properties of grade S44020
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 779 (≥) | 218 (≥) | 12 | 14 | 33 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 331 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 299 | 723 | 291 |
S44020 - Form of Supply
| Product type | Products | Dimension | Processes | Deliver Status |
|---|---|---|---|---|
| Plates / Sheets | Plates / Sheets | 0.08-200mm(T)*W*L | Forging, hot rolling and cold rolling | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Steel Bar | Round Bar, Flat Bar, Square Bar | Φ8-1200mm*L | Forging, hot rolling and cold rolling, Cast | Black, Rough Turning, Shot Blasting, |
| Coil / Strip | Steel Coil /Steel Strip | 0.03-16.0x1200mm | Cold-Rolled & Hot-Rolled | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Pipes / Tubes | Seamless Pipes/Tubes, Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Hot extrusion, Cold Drawn, Welded | Annealed, Solution and Aging, Q+T, ACID-WASHED |
Cross Reference Table(Equivalent Grade)
| Grade | Standard | Country | Application |
|---|---|---|---|
| A 582 S44020 | SAE | USA | Standard Specification for Free-Machining Stainless Steel Bars |
| S44020 | AISI | USA | Martensitic Chromium Free Machining Stainless Steel |
| A 582 S44020 | SAE | USA | Standard Specification for Free-Machining Stainless Steel Bars |
| S44020 | AISI | USA | Martensitic Chromium Free Machining Stainless Steel |
| S44020 | UNS | USA | S44020 |
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