← Glossary

0.8155

EN-GJMB-550-4 (GTS-55)

0.8155 (EN-GJMB-550-4 (GTS-55)) is malleable [[element:Fe|iron]]: white iron that has become tough through [[glossary:gluehen|annealing]]. For repairs it's weldable if you preheat. Typical composition: 2.5 % C, 0.5 % Mn, 1.3 % Si.

AI Transparency (EU AI Act): Created on the basis of our own many years of practical experience in welding technology, with the help of AI, and reviewed editorially.

© 2026 Welder-World. All content is for training and continuing education and does not replace a certified welding procedure specification.