Stainless steels are high-alloy steels which have high corrosion resistance compared to other steels due to the presence of large amounts of chromium. Based on their crystalline structure, they are divided into three types such as ferritic, austenitic, and martensitic steels. Another group of stainless steels are precipitation-hardened steels. They are a combination of martensitic and austenitic steels.
Grade 440C stainless steel is a high carbon martensitic stainless steel. It has high strength, moderate corrosion resistance, and good hardness and wear resistance. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts.
Good resistance to the atmosphere, fresh water, foods, alkalies and mild acids. Best resistance in the hardened and tempered and passivated condition. A smooth polished surface also assists.
The corrosion resistance of grade 440C approximates that of grade 304 in many environments.
Not recommended for use in temperatures above the relevant tempering temperature, because of reduction in mechanical properties by over-tempering.
Annealing – Full anneal – 850-900°C, slow furnace cool to about 600°C and then air cool. Sub-critical Annealing – 735-785°C and slow furnace cool.
Hardening – Heat to 1010-1065°C, followed by quenching in warm oil or air. Oil quenching is necessary for heavy sections. Immediately temper at 150-370°C to obtain a wide variety of hardness values and mechanical properties as indicated in the accompanying table.
Tempering in the range 425-565°C is to be avoided because of reduced impact resistance and corrosion resistance. Tempering in the range 590-675°C results in lower hardness (the product become machinable) and high impact resistance.
If welding is necessary pre-heat at 250°C and follow welding with a full anneal. Grade 420 filler will give a high hardness weld (although not as high as the 440C), but 309 or 310 will produce soft welds with higher ductility.
In the annealed condition this grade is relatively easily machined; approximately the same as for high speed steel. Chips are tough and stringy so chip breakers are important. If these grades are hardened machining becomes more difficult and probably impossible.
Description: Valve related cnc products and vmc components
Material: Stainless steel 202, 304/304L, 316/316L, 304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410, Duplex 2205 and 2507. Nickel Alloy such as alloy 200/201, C276, C22, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and Titanium Grade 1, Grade 2, Grade 5 and all other grades in Copper alloys.
Size: As per Diagram and requirement
Finish: As per requirement
Process: CNC swiss, CNC turning, VMC machining, Milling and Grinding. |
Description: Spool CNC components
Material: Stainless steel 202, 304/304L, 316/316L, 304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410, Duplex 2205 and 2507. Nickel Alloy such as alloy 200/201, C276, C22, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and Titanium Grade 1, Grade 2, Grade 5 and all other grades in Copper alloys.
Size: As per Diagram and requirement
Finish: As per requirement
Process: CNC swiss, CNC turning, VMC machining, Milling and Grinding. |
Description: Medical Implants, Bone screw, pedicle screws, pins, plates and other implants
Material: Stainless steel 202, 304/304L, 316/316L, 304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410, Duplex 2205 and 2507. Nickel Alloy such as alloy 200/201, C276, C22, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and Titanium Grade 1, Grade 2, Grade 5 and all other grades in Copper alloys.
Size: As per client’s requirements
Finish: As per clients requirements
Process: CNC swiss, CNC turning, VMC machining, Milling and Grinding. |
Description: Plugs and Exotic Fasteners with unique designs and sizes
Material: Stainless steel 202, 304/304L, 316/316L, 304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410, Duplex 2205 and 2507. Nickel Alloy such as alloy 200/201, C276, C22, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and Titanium Grade 1, Grade 2, Grade 5 and all other grades in Copper alloys.
Size: As per client’s requirements
Finish: As per clients requirements and all types of coating available
Process: CNC swiss, CNC turning, VMC machining, Milling and Grinding. |
Description: Shaft and pins
Material: Stainless steel 202, 304/304L, 316/316L, 304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410, Duplex 2205 and 2507. Nickel Alloy such as alloy 200/201, C276, C22, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and Titanium Grade 1, Grade 2, Grade 5 and all other grades in Copper alloys.
Size: As per client’s requirements
Finish: As per clients requirements
Process: CNC swiss, CNC turning, VMC machining, Milling and Grinding. |
Description: Precision CNC and VMC sheet metal components, Top Rollers, Spray nozzles, Instrumentation fittings as per drawings
Material: Stainless steel 202, 304/304L, 316/316L, 304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410, Duplex 2205 and 2507. Nickel Alloy such as alloy 200/201, C276, C22, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and Titanium Grade 1, Grade 2, Grade 5 and all other grades in Copper alloys.
Size: As per client’s requirements
Finish: As per clients requirements
Process: CNC swiss, CNC turning, VMC machining, Milling and Grinding. |
Description: Aerospace parts such as adapters, flanges, knobs, couplings, fittings, ferrules, brackets, clamps, connectors, hoses, Elbows, Tees, shafts, Nipples, Hex plugs etc
Material: Stainless steel 202, 304/304L, 316/316L, 304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410, Duplex 2205 and 2507. Nickel Alloy such as alloy 200/201, C276, C22, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and Titanium Grade 1, Grade 2, Grade 5 and all other grades in Copper alloys.
Size: As per client’s drawings and requirements
Finish: As per clients drawings and requirements
Process: CNC swiss, CNC turning, VMC machining, Milling and Grinding. |
Description: Industrial Precision CNC and VMC components for motorsports, automotives, bicycle components, energy and power, oil and gas equipments etc.
Material: Stainless steel 202, 304/304L, 316/316L, 304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410, Duplex 2205 and 2507. Nickel Alloy such as alloy 200/201, C276, C22, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and Titanium Grade 1, Grade 2, Grade 5 and all other grades in Copper alloys.
Size: As per client’s drawings and requirements
Finish: As per clients drawings and requirements
Process: CNC swiss, CNC turning, VMC machining, Milling and Grinding. |