UNS T20811Enquiry|Print this page
| Category | Type | Steel grade | Standard | Country |
|---|---|---|---|---|
| Grades | Special Alloy | T20811 | UNS | USA |
Chemical composition%of the ladle analysis of gradeT20811
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Mo(％) | V(%) |
|---|---|---|---|---|---|---|---|
| 0.33～0.43 | 0.80～1.20 | 0.20～0.50 | ≤0.030 | ≤0.030 | 4.75～5.50 | 1.10～1.60 | 0.30～0.60 |
Cold pull hardness HBS: 262
Preheat temperature / ℃ : 788
Quenching temperature / ℃ | salt bath furnaces: 996
Quenching temperature / ℃ | controlled atmosphere furnace: 1010
Holding time/min: 5 to 15
Quenching medium: air cold
Tempering temperature / ℃ : 552
After tempering quartile hardness HRC: 53
| 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) |
|---|---|---|---|---|---|---|
| 487(≥) | 141(≥) | 31 | 11 | 32 | 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 |
|---|---|---|---|---|---|---|---|
| 971(≥) | 735(≥) | 11 | 14 | 14 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 113 | |
| Temp. °C/°F | Creep strain limit (10000h) (Rp1,0)N/mm2 | Creep rupture strength (10000h) (Rp1,0)N/mm2 | |||||
| 333 | 199 | 694 |
| 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 |
|---|---|---|---|
| T20811 | UNS | USA | Hot-Work Tool Steel |
| T20811 | UNS | USA | Hot-Work Tool Steel |