Introduction of Stainless Steel GX40CrSi28 (EN 1.4776)
Manufacture Process for Stainless Steel GX40CrSi28 (EN 1.4776)
- Sand Casting
- Investment Casting, precision lost wax casting
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PDF VIEWContent for Stainless Steel GX40CrSi28 (EN 1.4776)
Standard of Stainless Steel GX40CrSi28 (EN 1.4776)
EN 10295 Heat resistant steel castings.
DIN 17465 Heat resistant steel castings
GX40CrSi28 (EN 1.4776) Equivalent Material Grades
- America: ASTM A608 Grade HC30
- America: ASTM A297 Grade HC ( Type 28 Chromium)
- Japan: JIS G5122 Grade SCH 2X2
- China: GB/T 8492 Grade ZG40Cr28Si2
GX40CrSi28 (EN 1.4776) Material Physical Property
Density: 7.5-7.6 kgs/dm3
Specific heat: 500 J(kg-k) at 20 °C
Thermal conductivity: 18.8 W/(m-K) at 20 °C
21.0 W/(m-K) at 100 °C
Thermal expansion: 11.5 10-6k-1 from 20°C up to 400°C
14 10-6k-1 from 20°C up to 800°C
16 10-6k-1 from 20°C up to 1000°C
GX40CrSi28 (EN 1.4776) Chemical Composition Requirements
| Casting Standard | EN10295 | DIN 17465 |
| Stainless Steel Grade | GX40CrSi28 | GX40CrSi29 |
| EN Number | 1.4776 | 1.4776 |
| Carbon | 0.30-0.50 | 0.30-0.45 |
| Manganese (max) | 1.00 | 0.5-1.0 |
| Silicon | 1.00-2.50 | 1.00-2.50 |
| Sulfur (max) | 0.030 | 0.030 |
| Phosphorus ( max) | 0.040 | 0.035 |
| Chromium | 27.0-30.0 | 27.0-30 |
| Nickel ( max) | 0.10 | – |
| Molybdenum (max) | 0.50 | – |
| W (max) | 0.2 | – |
| Nb (max) | 0.20 | – |
| V (max) | 0.08 | – |
| Cu (max) | 0.20 | – |
| Co (max) | 0.50 | – |
GX40CrSi28 (EN 1.4776) Mechanical Property
| Stainless Steel Casting Grade | Heat Treatment | Hardness | Test At room temperature | ||||||
| Tensile Test, min | |||||||||
| Standard | Name | Number | Symbol | Annealed | HB30 | Rp0.2 MPa | Rm MPa | A % | |
| EN10295 | GX40CrSi28 | 1.4776 | – | As-cast condition | – | – | – | – | |
| DIN 17465 | GX40CrSi29 | 1.4776 | – | As-cast condition | – | – | – | – | |
The hardness of GX40CrSi28 will be less than 320HBW in annealed condition.
Creep properties:1% creep limit in N/mm2.
| Stainless Steel Casting Grade | 600°C | 700°C | 800°C | 900°C | |||||||||||
| sr | s1 % | sr | s1 % | sr | s1 % | sr | s1 % | ||||||||
| Standard | Name | Number | 100 | 1000 | 10000 | 100 | 1000 | 10000 | 100 | 1000 | 10000 | 100 | 1000 | 10000 | |
| EN10295 | GX40CrSi28 | 1.4776 | – | 40 | 26 | 25 | 21 | 11 | – | – | 5 | 8 | 6.5 | 1.5 | |
| DIN 17465 | GX40CrSi29 | 1.4776 | – | – | 26 | – | – | 11 | – | – | 5 | – | – | 1.5 | |
GX40CrSi28 (EN 1.4776) Heat Treatment Requirement
As-cast condition (no heat treatment).
Castings may be supplied in annealed condition (800-850°C) in which cases a maximum hardness values may be agreed.
GX40CrSi28 (EN 1.4776) Application
- Rollers and grating.
- Furnace, burner beds for garbage incinerators.
- Heat Exchanger System.
- Cement Industry
GX40CrSi28 (EN 1.4776) Machinability:
NOT BAD
GX40CrSi28 (EN 1.4776) Weldability:
In DIN 17465, the covered electrode is type of 30 or 29.9; Wire or rod is X8Cr30 (1.4773) or X10CrNi30-9(1.4337). Preheated at temperature 700-800°C, the casting after welding (post weld heat treatment) should be slow cooling in furnace.
GX40CrSi28 (EN 1.4776) Maximum use temperatures
1150 °C MAX
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