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KS STR3 Details
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| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | STR3 | Martensite | Korea - KS , D 3731 (2002) - Heat - resisting steel bars |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.35 | 0.45 | ||
| Si | 1.80 | 2.50 | ||
| Mn | - | 0.60 | ||
| P | - | 0.03 | ||
| S | - | 0.03 | ||
| Cr | 10.00 | 12.00 | ||
| Ni | - | 0.60 | ||
| Mo | 0.70 | 1.30 | ||
| N | - | - | ||
| Cu | - | 0.30 |
| 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) |
|---|---|---|---|---|---|---|
| 234 (≥) | 541 (≥) | 32 | 12 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 244 |
| 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 |
|---|---|---|---|---|---|---|---|
| 454 (≥) | 948 (≥) | 32 | 22 | 13 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 112 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 344 | 834 | 469 |
| 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 |
|---|---|---|---|
| STR31 | KS | Korea | Heat - resisting steel bars |
| STR310 | KS | Korea | Heat - resisting steel plates and sheets |
| STR35 | KS | Korea | Heat - resisting steel bars |
| STR36 | KS | Korea | Heat - resisting steel bars |
| STR37 | KS | Korea | Heat - resisting steel bars |
| STR38 | KS | Korea | Heat - resisting steel bars |
| STR309 | KS | Korea | Heat - resisting steel plates and sheets |
| STR330 | KS | Korea | Heat - resisting steel plates and sheets |
| STR3 | KS | Korea | Heat - resisting steel bars |