Pressure vessel steel

STANDARDEN 10028-2 / EN 10222-2FORMPlate, pipe, forgingMaterial no.1.0425Former DINHIIASTMA516 Gr 60 (near)

Pressure vessel steel with guaranteed elevated-temperature properties. The core EN carbon steel for welded valve bodies, flanges and pipe connections.

Rp0.2 · MPa: ≥ 265
Rm · MPa: 410–530
TEMPERATURE: −20 … +400 °C
COST

Representative sample of P265GH: machined top face and rolled side — REPRESENTATIVE IMAGE

Chemical composition

C≤ 0.20

Si≤ 0.40

Mn0.80–1.40

P≤ 0.025

S≤ 0.010

Al≥ 0.020

N≤ 0.012

Cr≤ 0.30

Ni≤ 0.30

Cu≤ 0.30

Mo≤ 0.08

Nb≤ 0.020

Ti≤ 0.03

V≤ 0.02

Mechanical properties

STANDARD · CONDITION	Rp0.2 MPa	Rp1.0 MPa	Rm MPa	A %	KV J
EN 10028-2 · +N, t ≤ 16 mm	265	—	410–530	22	27 (−20 °C)
EN 10028-2 · +N, 60 < t ≤ 100 mm	215	—	410–530	22	27 (−20 °C)

Normalized (+N). ReH decreases with thickness: 16–40 mm 255 · 40–60 mm 245 · 60–100 mm 215. KV transverse: 27 J (−20 °C), 40 J (+20 °C).

Service temperature

−20 °C+400 °C−200−1000100200300400500600700800

Lower value: the temperature of the impact requirement (−20 °C, transverse 27 J). EN 10028-2 gives elevated-temperature proof strength values up to 400 °C.

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: 7.85 g/cm³

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

Guaranteed proof strength at elevated temperature
Very good weldability
Economical

Weaknesses

No corrosion resistance

Manufacturing and use

ECONOMY: Low.
MANUFACTURING METHODS: Welded construction from plate · Forging · Pipe
TYPICAL VALVE PARTS: Welded body · Flange · Pipe connections

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

Source: EN 10028-2 / EN 10222-2. Values compiled and verified by Emsal Vana; for binding values, refer to the current edition of the standard and the material certificate.