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Resources & FAQ’s

At Fonderie Schlumberger, we work with three families of cast iron, Grey Iron, Ductile Iron and Austempered Ductile Iron (ADI), comprising around twenty grades to meet the full range of mechanical requirements across the industry.

STANDARD EN 1561

Grey Iron

EN Shades DIN Standards Rm (MPa) HB hardness Machinability Areas of application
EN-GJL-250 GG25 250 180–250 Very good Machine frames, for machines, casings, structural parts
EN-GJL-HB215 — — >215 Very good Grade classified by hardness rather than strength; components requiring a controlled hardness
EN-GJL-300 GG30 300 200–275 Very good Pump casings, parts subject to moderate pressure
EN-GJL-350 GG35 350 220–290 Good Guides, guide rails, parts with high wear resistance
Lamellar cast iron does not have a defined elastic limit nor a defined elongation, a characteristic inherent in its graphitic structure.
STANDARD EN 1563

Ductile Iron

EN Shades DIN Standards Rm (MPa) Rp0,2 (MPa) A (%) HB hardness Machinability Areas of application
EN-GJS-400-18 GGG40 400 240 18 130–175 Very good Pipes, fittings, parts ductile
EN-GJS-400-18-LT GGG40-3 400 240 18 130–175 Very good Applications with resilience down to -20°C
EN-GJS-400-18-RT — 400 240 18 130–175 Very good Resilience guaranteed at ambient temperature
EN-GJS-400-15 GGG40 400 250 15 130–180 Very good Fatigue-prone parts, crankshafts, connecting rods
EN-GJS-450-10 — 450 310 10 160–210 Good Parts with resistance in between
EN-GJS-450-18 — 450 270 18 140–200 Good Parts ductile high strength
EN-GJS-500-7 GGG50 500 320 7 170–230 Good Gears, pinions, transmission
GJS-550-6 — 550 350 6 180–240 Good Equivalent ASTM A536 80-55-06
EN-GJS-600-3 GGG60 600 370 3 190–270 Average Parts with high mechanical strength
EN-GJS-700-2 GGG70 700 420 2 225–305 Average Crankshafts heavy, parts subject to high stress
EN-GJS-800-2 GGG80 800 480 2 245–335 Difficult High wear resistance, wear parts
STANDARD EN 1564

Austempered Ductile Iron (ADI)

ADI requires a specific heat treatment following casting. The selection of the grade and the feasibility are analysed as part of the co-design process. Our technicians analyse your specification and provide you with guidance right from the co-design phase.

 

EN Shades DIN Standards Rm (MPa) Rp0,2 (MPa) A (%) HB hardness Machinability Areas of application
EN-GJS-800-10 GGG-70-2 ADI 800 500 10 250–310 Average Parts with dynamic high toughness
EN-GJS-800-10-RT — 800 500 10 250–310 Average Low-Temperature Dynamic Applications
EN-GJS-900-8 — 900 600 8 280–340 Average Gears, heavy-duty transmission
EN-GJS-1050-6 GGG-100 ADI 1050 700 6 300–360 Difficult High strength and toughness combined
EN-GJS-1200-3 GGG-120 ADI 1200 850 3 340–400 Difficult Wear parts, abrasive applications
EN-GJS-1400-1 GGG-140 ADI 1400 1100 1 380–480 Very difficult Maximum durability, extreme applications

You don’t know which grade to choose?

Our technicians analyse your specifications and provide you with guidance right from the co-design phase.

 

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