Body materials — EN numbers, EN names and ASME grades

Every GFT9 valve body is a pressure casting to EN 10213 (steel castings for pressure purposes). In Europe such a steel carries two official designations: a material number (EN 10027-2, e.g. 1.0619) and a symbolic name that spells out what the steel is (EN 10027-1, e.g. GP240GH). Both are used on EN 10204 3.1 inspection certificates. North American specifications use a third name for the comparable grade (ASTM A216 WCB, ASTM A351 CF8M). All three can describe the same valve body — the table shows which belongs to which.

The ASTM grade is the recognised counterpart, not an identical specification: composition limits, strength values and test requirements differ slightly between EN 10213 and ASTM A216 / A351. GFT9 bodies are cast and certified to the EN grade; the ASTM grade is given for comparison, so an enquiry written to an ASME piping class can be matched without translation.

Body options per line: 1.0619 as standard, 1.4408 or 1.4409 as stainless body (ball valve 1.4409 and butterfly valve stainless on request). The exact grades of each line are listed in the technical data of its product page.

• Material number 1.0619: “1” = steel, “0” = unalloyed; the remaining digits are a serial number from the EN 10027-2 register. 1.4xxx are the stainless steels.
• Symbolic name GP240GH: G = cast, P = for pressure purposes, 240 = minimum yield strength in MPa, GH = for elevated temperatures.
• Symbolic name GX5CrNiMo19-11-2: G = cast, X = high-alloy, 5 = 0.05 % carbon (× 100), then the main alloying elements and their percentages: 19 % chromium, 11 % nickel, 2 % molybdenum. GX2… is the same alloy with ≤ 0.03 % carbon — the low-carbon (“L”) version.

• 1.0619 / A216 WCB is the standard body for most process services: the medium never touches it, the PFA lining does the corrosion work. EN 12516-1 rates it from −10 °C; below −10 °C GFT9 applies AD 2000-Merkblatt W 10, stress category II — 75 % of the rating down to −60 °C. See the pressure-temperature explainer.
• 1.4408 / CF8M and 1.4409 / CF3M are chosen where the outside of the valve must resist the environment (coastal sites, wash-down, chlorine atmosphere) or where a plant specification asks for stainless pressure parts. EN 10213 specifies their impact test at −196 °C. On the GFT9 P-T diagrams the same envelope is shown for all three materials — for the stainless castings the low-temperature step is on the safe side.
• Certification is the same for all three: EN 10204 3.1 inspection certificate, Pressure Equipment Directive 2014/68/EU, pressure test to DIN EN 12266-1.

Minimum values from EN 10213 and ASTM A216 / A351, for comparison. The values certified for a valve are those on its 3.1 inspection certificate.

The offer says CF8M, the datasheet says 1.4408 — is that the same valve?
Yes. 1.4408 is the EN material number, GX5CrNiMo19-11-2 its EN name, CF8M the ASTM A351 counterpart. GFT9 casts and certifies the body to EN 10213 as 1.4408; CF8M is given so the valve can be matched to an ASME piping class.

Is GP240GH a different steel from 1.0619?
No — it is the same steel. 1.0619 is the number, GP240GH the name, both defined in EN 10213. The older DIN designation was GS-C25. The ASTM counterpart is A216 WCB.

Which body material do I need?
The lining decides corrosion resistance on the inside; the body material matters for the outside environment, the plant's material specification and the temperature range. 1.0619 is the standard; 1.4408 / 1.4409 where stainless pressure parts are specified or the surroundings are aggressive. All three carry the same pressure-temperature diagram.