Steel Casting Manufacturer in India

Esteem Auto casts austenitic stainless grades including CF-8 (304), CF-8M (316), CF-3 (304L), CF-3M (316L), CF-8C (347) and CG-8M (317); ferritic grades 409, 442 and 446; martensitic 410, 416 and 420; precipitation-hardening 17-4 PH and 15-5 PH; duplex ASTM A890 Grades 1A and 4A; plus alloy steels such as 4130, 4140, 8630, 35CrMo and 40CrNiMo.

CF8M is the cast equivalent of 316 stainless steel. It holds 18-21 percent chromium, 9-12 percent nickel and 2-3 percent molybdenum, with carbon capped at 0.08 percent. The molybdenum addition is what separates it from CF8, giving markedly better resistance to pitting and chloride attack in seawater, acids and process chemicals.

Chemistry is nearly identical except that CF8M contains 2-3 percent molybdenum and CF8 contains none. That single addition gives CF8M superior pitting and crevice corrosion resistance, particularly against chlorides, so it is specified for marine, chemical and offshore service. CF8 remains adequate and more economical for general corrosion duty.

They are equivalent in composition but not identical in form. CF8M is the cast version and 316 is the wrought version of essentially the same alloy. Cast grades carry slightly different chemistry limits and a cast microstructure with some ferrite, which affects mechanical properties and weldability. Drawings calling for 316 castings are normally supplied as CF8M.

Duplex grades hold a mixed austenitic-ferritic microstructure, giving roughly twice the yield strength of standard austenitic stainless with better resistance to chloride stress corrosion cracking. Esteem Auto casts ASTM A890 Grade 1A (CD4MCu) and Grade 4A (CD3MN), typically specified for pumps, valves and process equipment in oil and gas, chemical and desalination service.

Both are precipitation-hardening stainless steels that reach high strength through ageing rather than quenching. 17-4 PH carries 15.5-16.7 percent chromium and 3.6-4.6 percent nickel. 15-5 PH holds 14-15.5 percent chromium with 4.2-5 percent nickel and a more controlled ferrite balance, giving better transverse toughness where directional properties matter.

Martensitic grades are chosen where hardness and wear resistance matter more than maximum corrosion resistance. They can be hardened by heat treatment, unlike austenitic grades. 410 suits general wear parts and valve trim, 420 offers higher carbon and greater hardness, and 416 adds sulphur for improved machinability.

Austenitic grades such as CF-8 and CF-8M carry high nickel, are non-magnetic, cannot be hardened by heat treatment, and offer the best general corrosion resistance and toughness. Ferritic grades such as 442 and 446 hold little or no nickel, are magnetic and more economical, and are chosen for oxidation and scaling resistance at elevated temperature.

Esteem Auto casts common chromium-molybdenum and nickel-chromium-molybdenum alloy steels including 4130, 4140, 8630, 35CrMo and 40CrNiMo. These are specified where higher strength, toughness and fatigue resistance are required than plain carbon steel provides, typically for heavy machinery, mining, power and general engineering components.

Almost always. Steel castings are supplied in a heat treated condition because as-cast structures carry residual stress and coarse grain. Austenitic stainless is solution annealed to restore corrosion resistance, alloy steels are normalised or quenched and tempered to reach strength targets, and precipitation-hardening grades are solution treated then aged. The route is set by the grade specified.

Casting suits complex internal passages, curved flow paths and one-piece geometry that would need many welded sections to fabricate, removing weld joints as failure points. Against forging, casting handles far more intricate shapes and is more economical at moderate volumes, though forging retains an edge for maximum directional strength in simple shapes.

Yes. Pump casings, impellers and valve bodies are among the most common applications for the austenitic and duplex grades we cast, since they combine complex internal flow passages with corrosive service. Grade selection is driven by the medium handled, with CF-8M and duplex A890 typically specified for chloride-bearing or acidic duty.