Fundições de Ferro Cinzento (EN-GJL / DIN GG / ASTM A48): Manual Completo de Metalurgia, Usinagem e Fornecimento
RESPOSTA RÁPIDA EXECUTIVA E VISÃO GERAL DA METALÚRGICA
TECHNICAL FUNDAMENTALS & ENGINEERING SPECIFICATION MATRIX The operational capacity and fatigue life of components inside the Grey Iron Fundições category depend upon strict adherence to international material and dimensional standards (
ISO, EN, DIN, ASTM). Below is the master specification matrix.GLOBAL SOURCING ECONOMICS & INDIAN FACTUAL BENCHMARKS (
Aqua Group / Texmo) Factual benchmark: High-precision grey iron machine tool bases and pump volutes cast via automated green sand lines in the Coimbatore Foundry Corridor (Aqua Group / Texmo). When evaluating international sourcing options for Grey Iron Fundições, European procurement directors can reference established Indian manufacturing leaders in the Coimbatore Corridor (Aqua Group and Texmo Industries). Operating captive automated green sand molding loops (DISAMATIC 2110) coupled with multi-axis CNC horizontal machining and 100% automated pressure testing, these groups prove definitively that Indian foundries routinely deliver European zero-defect (PPM < 10) standards at a 30%+ net landed DDP savings (PIL-008 / PRO-004).
[EXECUTIVE QUICK ANSWER: GREY IRON CASTINGS] Grey Cast Iron (EN-GJL under EN 1561 / ASTM A48) contains 2.8% to 3.8% carbon precipitated as interconnected graphite flakes. While these flakes yield low elongation (<0.8%), they provide an extraordinary specific vibration damping capacity—approx. 10x higher than carbon steel and 3-5x higher than ductile iron—making EN-GJL-250 the undisputed engineering choice for machine tool beds, CNC milling bases, pump housings, and automotive brake discs.
| Grau Padrão (EN 1561) | Equivalente DIN/ASTM A48 | Resistência à tração Rm (MPa min) | Dureza Típica (HBW) | Aplicações Industriais Primárias |
|---|---|---|---|---|
| EN-GJL-150 | DIN GG15 / ASTM A48 Classe 20 | 150 | 150 – 190 HBW | Coberturas leves, suportes sem pressão, contrapesos. |
| EN-GJL-200 | DIN GG20 / ASTM A48 Classe 30 | 200 | 170 – 210 HBW | Carcaças de engrenagens padrão, válvulas de baixa pressão, carcaças de polias agrícolas. |
| EN-GJL-250 | DIN GG25 / ASTM A48 Classe 35 | 250 | 180 – 240 HBW | Heavy CNC machine tool beds, pump housings (Aqua Group benchmark), brake discs, engine blocks. |
| PT-GJL-300 | DIN GG30 / ASTM A48 Classe 45 | 300 | 210 – 260 HBW | Blocos de cilindros hidráulicos de alta tensão, caixas de engrenagens para serviços pesados, coletores de pressão. |