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GB GH2018 Details
GB GH2018 Standard Download
| Category | Type | Grade | Designations |
|---|---|---|---|
| Grades | Stainless Steels | GH2018 | China - GB , GB/T 14992 (1994) - Classification and designation for superalloys and high temperature intermetallic materials GB/T 14995 (2010) - Hot-rolled superalloy sheets GB/T 14996 (2010) - Cold-Rolled heat-resisting superalloy sheets |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.06 | ||
| Cr | 18.0 | 21.0 | ||
| Mo | 3.70 | 4.30 | ||
| Ni | 40.0 | 44.0 | ||
| W | 1.80 | 2.20 | ||
| Al | 0.35 | 0.75 | ||
| Ti | 1.80 | 2.20 | ||
| Si | - | 0.60 | ||
| Mn | - | 0.50 | ||
| P | - | 0.020 | ||
| S | - | 0.015 | ||
| B | - | 0.015 | ||
| Ce | - | 0.02 | ||
| Zr | - | 0.05 |
| 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) |
|---|---|---|---|---|---|---|
| 594 (≥) | 579 (≥) | 24 | 12 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 212 |
| 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 |
|---|---|---|---|---|---|---|---|
| 453 (≥) | 878 (≥) | 12 | 31 | 14 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 334 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 655 | 397 | 949 |
| 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 |
|---|---|---|---|
| GH2018 | GB | China | Classification and designation for superalloys and high temperature intermetallic materials |