KS STR4Enquiry|Print this page
| Category | Type | Steel grade | Standard | Country |
|---|---|---|---|---|
| Grades | Special Alloy | STR4 | KS | Korea |
Chemical composition%of the ladle analysis of gradeSTR4
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) |
|---|---|---|---|---|---|---|
| 0.75-0.85 | 1.75-2.25 | 0.20-0.60 | Max 0.03 | Max 0.03 | 19.0-20.5 | 1.15-1.65 |
| 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) |
|---|---|---|---|---|---|---|
| 113(≥) | 881(≥) | 33 | 42 | 22 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 141 |
| 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 |
|---|---|---|---|---|---|---|---|
| 612(≥) | 575(≥) | 31 | 32 | 42 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 242 | |
| Temp. °C/°F | Creep strain limit (10000h) (Rp1,0)N/mm2 | Creep rupture strength (10000h) (Rp1,0)N/mm2 | |||||
| 933 | 634 | 364 |
| 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 |
|---|---|---|---|
| STR446 | KS | Korea | Heat - resisting steel plates and sheets |
| STR4 | KS | Korea | Heat - resisting steel bars |
| STR409 | KS | Korea | Heat - resisting steel plates and sheets |
| STR409L | KS | Korea | Heat - resisting steel plates and sheets |