Standard Specification for Free-Machining Stainless Steel Bars
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SAE A 582 S44020| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | A 582 S44020 | Martensite | USA - SAE , A 582/A 582M (2012) - Standard Specification for Free-Machining Stainless Steel Bars |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.95 | 1.20 | ||
| Mn | - | 1.25 | ||
| Si | - | 1.00 | ||
| P | - | 0.04 | ||
| S | 0.10 | 0.35 | ||
| Cr | 16.00 | 18.00 | ||
| Ni | - | 0.75 | ||
| Mo | 0.40 | 0.60 | ||
| N | - | 0.08 |
| 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) |
|---|---|---|---|---|---|---|
| 676 (≥) | 598 (≥) | 11 | 24 | 14 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 211 |
| 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 |
|---|---|---|---|---|---|---|---|
| 339 (≥) | 563 (≥) | 23 | 41 | 41 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 142 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 444 | 346 | 179 |
| 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 |
| 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 S44023 | SAE | USA | Standard Specification for Free-Machining Stainless Steel Bars |
| S44023 | AISI | USA | Martensitic Chromium Selenium Bearing 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 |
| A 582 S44023 | SAE | USA | Standard Specification for Free-Machining Stainless Steel Bars |
| S44023 | AISI | USA | Martensitic Chromium Selenium Bearing Free Machining Stainless Steel |
| SUS 440F | JIS | Japan | Stainless steel bars |
| STS440F | KS | Korea | Stainless steel bars |
| 440F | CNS | China | Stainless steel bars |
| AISI440F | AISI | USA | AISI440F |
| AISI440F Se | AISI | USA | AISI440F Se |
| S44020 | UNS | USA | S44020 |