AFNOR X55CrMnNiN20-8 Enquiry | Print this page
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- » X55CrMnNiN20-8
NC15Fe7TA
NC20TA
X45CrSi9-3
X40CrSiMo10-2
1.4731
1.4718
X33CrNiMnN23-8
1.4866
X53CrMnNiN21-9
1.4871 - AFNOR
- France
- Valve Internal Combustion Engines steel (NF-EN 1009-1998)
Chemical composition % of the ladle analysis of grade X55CrMnNiN20-8
| 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) |
|---|---|---|---|---|---|---|
| 646 (≥) | 528 (≥) | 14 | 44 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 134 |
| 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 |
|---|---|---|---|---|---|---|---|
| 227 (≥) | 172 (≥) | 44 | 32 | 21 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 444 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 964 | 681 | 997 |
| 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 | Valve steels and alloys for internal combustion engines |
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| 1.4875 | Valve steels and alloys for internal combustion engines |
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| X55CrMnNiN20-8 | Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines |