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KS STR661 Details
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Category | Type | Grade | Microstructure | Designations |
---|---|---|---|---|
Grades | Stainless Steels | STR661 | Austenite | Korea - KS , D 3731 (2002) - Heat - resisting steel bars D 3732 (2002) - Heat - resisting steel plates and sheets |
Elements | Min.(≥) | Max.(≤) | Similar | Remarks |
---|---|---|---|---|
C | 0.08 | 0.16 | ||
Si | - | 1.00 | ||
Mn | 1.00 | 2.00 | ||
P | - | 0.04 | ||
S | - | 0.03 | ||
Cr | 20.00 | 22.50 | ||
Ni | 19.00 | 21.00 | ||
Mo | 2.50 | 3.50 | ||
N | 0.10 | 0.20 | ||
Co | 18.50 | 21.00 | ||
W | 2.00 | 3.00 | ||
Nb | 0.75 | 1.25 |
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) |
---|---|---|---|---|---|---|
579 (≥) | 111 (≥) | 31 | 14 | 21 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 431 |
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 |
---|---|---|---|---|---|---|---|
933 (≥) | 197 (≥) | 43 | 12 | 21 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 144 | |
Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
314 | 436 | 231 |
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 |
---|---|---|---|
STR661 | KS | Korea | Heat - resisting steel plates and sheets |