AFNOR X55CrMnNiN20-8Enquiry|Print this page
| Category | Type | Steel grade | Standard | Country |
|---|---|---|---|---|
| Grades | Special Alloy | X55CrMnNiN20-8 | AFNOR | France |
Chemical composition%of the ladle analysis of gradeX55CrMnNiN20-8
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | N(%) |
|---|---|---|---|---|---|---|---|
| 0.50-0.60 | Max 0.25 | 7.00-10.00 | Max 0.035 | Max 0.030 | 19.5-21.5 | 1.50-2.75 | 0.20-0.40 |
| 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) |
|---|---|---|---|---|---|---|
| 393(≥) | 654(≥) | 14 | 21 | 44 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 232 |
| 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 |
|---|---|---|---|---|---|---|---|
| 864(≥) | 217(≥) | 34 | 43 | 32 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 244 | |
| Temp. °C/°F | Creep strain limit (10000h) (Rp1,0)N/mm2 | Creep rupture strength (10000h) (Rp1,0)N/mm2 | |||||
| 421 | 559 | 744 |
| 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 |
|---|---|---|---|
| X55CrMnNiN20-8 | AFNOR | France | Valve steels and alloys for internal combustion engines |
| 1.4875 | AFNOR | France | Valve steels and alloys for internal combustion engines |
| X55CrMnNiN20-8 | AFNOR | France | Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines |