Carbon and alloy steel · cast
1.0619
GP240GH
The EN carbon steel casting for pressure service; the European counterpart of WCB. The classic material for DIN-standard valve bodies.
- Rp0.2 · MPa
- ≥ 240
- Rm · MPa
- 420–600
- TEMPERATURE
- ≤ +400 °C
- COST
Chemical composition
C0.18–0.23
Si≤ 0.60
Mn0.50–1.20
P≤ 0.030
S≤ 0.020
Cr≤ 0.30
Mo≤ 0.12
Ni≤ 0.40
Cu≤ 0.30
V≤ 0.03
%.
Mechanical properties
| STANDARD · CONDITION | Rp0.2 MPa | Rp1.0 MPa | Rm MPa | A % | KV J |
|---|---|---|---|---|---|
| EN 10213 · +N (900–980 °C) | 240 | — | 420–600 | 22 | 27 (+20 °C) |
| EN 10213 · +QT | 240 | — | 420–600 | 22 | 40 (+20 °C) |
Room temperature, t ≤ 100 mm.
Service temperature
+400 °C−200−1000100200300400500600700800
Upper limit 400 °C. No impact guarantee at low temperature (below −10 °C, choose an impact-tested grade).
This is the limit of the material itself. A valve's service temperature is usually set by the seal and seat materials; product pages give it for each seal option.
Physical properties and heat treatment
- DENSITY
- 7.8 g/cm³
- HEAT TREATMENT
- Normalizing 900–980 °C, or quenching + tempering (600–700 °C).
Media suitability GENERAL TREND
Fresh water
Seawater
Steam
Hydrocarbons, oil
Dilute acid
Caustic
Air, gas
Low temperature
Emsal assessment. The final choice is made from corrosion tables, taking concentration, temperature, chloride content and flow velocity into account.
Strengths and weaknesses
Strengths
- Tighter P and S limits than WCB
- Economical, weldable
Weaknesses
- No corrosion resistance
- No impact guarantee at low temperature
Manufacturing and use
- ECONOMY
- Low.
- MANUFACTURING METHODS
- Sand casting
- TYPICAL VALVE PARTS
- Body · Bonnet
Surface protection
- Wet paintIndustrial wet paint systemEmsal standard external protection
- Epoxy powder coatingElectrostatic epoxy powder coating (oven-cured, FBE)Water lines, internal and external
- GalvanizingHot-dip galvanizingSevere outdoor environments
Used in 2 Emsal products
- 051Threaded sight flow indicatorBody
- 131Knife gate valveGland follower
Source: EN 10213. Values compiled and verified by Emsal Vana; for binding values, refer to the current edition of the standard and the material certificate.