Grade 430 is a ferritic, straight chromium, non-hardenable grade, combining good corrosion resistance and formability characteristics with useful mechanical properties. Its ability to resist nitric acid attack permits its use in specific chemical applications but automotive trim and appliance components represents its largest fields of application.
Grade 430F is the free-machining version of this grade, available in bar form for use in automatic screw machines. Grade 434 is the molybdenum bearing version of Grade 430 and has the same useful combination of properties. Its molybdenum addition improves corrosion resistance.
These properties for 430 are specified for flat rolled product (plate, sheet and coil) in ASTM A240/A240M. Similar but not necessarily identical properties are specified for other products such as forgings and bar in their respective specifications. Properties of Grade 430F are specified for bar in ASTM A582.
Grade 430 has good resistance to a wide variety of corrosive enviornments, including nitric acid and some organic acids. It attains its maximum corrosion resistance when in the highly polished or buffed condition. In general its resistance to pitting and crevice corrosion resistance is close to that of grade 304. Stress corrosion cracking resistance of Grade 430 is very high, as it is for all ferritic grades.
Like other high-sulphur free machining grades 430F has much reduced resistance to pitting and crevice corrosion compared to its non-free machining equivalent.
In the table below are a list of possible alternative grades to Grade 430.
  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. |