| ●C | ee a oeous e lassifications and Symbols of | yo Steels | a | ●Non-Ferrous Metals | |
| | | | Cl Mil | Sl |
| Class | Material | Symbol | Code Description | ass atera | ymbo |
| eels | Rolled Steels for welded structures | SM | "M" for "Marine"-Usually used in welded marine structures | Alloys Copper and Copper alloys - Sheets, | CxxxxP CxxxxPP |
| al St | Re-rolled Steels | SRB | "R" for "Re-rolled" and "B" for "Bar" | per plates and strips | CxxxxR |
| uctur | Rolled Steels for general structures | SS | S for "Steel" and for "Structure" | Cop | CxxxxBD |
| Str | Liht aue sections for eneral structures | SSC | C for "Cold" | d | |
| g gg g | | | an Copper and Copper allos - Welded | CxxxxBDS |
| Steel Sheets | Hot rolled mild steel sheets / plates in coil form | SPH | P for "Plate" and "H" for "Hot" | per y pipes and tubes | CxxxxBE |
| Carbon steel tubes for piping | SGP | "GP" for "Gas Pipe" | Cop | CxxxxBF |
| Carbon steel tubes for boiler and heat exchangers | STB | "T" for "Tube" and "B" for "Boiler" | oys Aluminium and Al alloys - Sheets | AxxxxP |
| Seamless steel tubes for high pressure gas cylinders | STH | "H" for "High Pressure" | All , plates and strips | AxxxxPC |
| s | Carbon steel tubes for general structures | STK | "K" for "Kozo"-Japanese word meaning "structure" | nium | AxxxxBE |
| be | Carbon steel tubes for machine structural uses | STKM | "M" for "Machine" | umi Aluminium and Al alloys | AxxxxBD |
| el Tu | Alloy steel tubes for structures | STKS | "S" for "Special" | d Al -Rods, bars, and wires | AxxxxW |
| Ste | Alloy steel tubes for piping | STPA | "P" for "Piping" and "A" for "Alloy" | m an Aluminium and Al alloys-Extruded shape | s AxxxxS |
| Carbon steel tubes for pressure piping | STPG | "G" for "General" | iniu | AxxxxFD |
| Carbon steel tubes for high temperature piping | STPT | "T" for "Temperatures" | Alum Aluminium and Al alloys forgings | AxxxxFH |
| Carbon steel tubes for high pressure piping | STS | "S" after "SP" is abbreviation for "Special" | um | |
| Stainless steel tubes for piping | SUS-TP | "T" for "Tube" and "P" for "Piping" | Magnesi Alloys Magnesium alloy sheets and plates | MP |
| ures | Carbon steels for machine structural uses | SxxC | "C" for "Carbon" | kel ys Nickel-copper alloy sheets and plate | s NCuP |
| truct | Aluminium Chromium Molybdenum steels | SACM | "A" for "Al", "C" for "Cr" and "M" for "Mo" | Nic Allo Nickel-copper alloy rods and bars | NCuB |
| e S | Chromium Molybdenum steels | SCM | "C" for "Cr" and "M" for "Mo" | ht m | |
| chin | Chromium steels | SCr | "Cr" for "Chromium" | Wroug itaniu Titanium rods and bars | TB |
| Ma | Nickel Chromium steels | SNC | "N" for "Nickel" and "C"for "Chromium" | T Brass castins | YBsCx |
| eel for | Nickel Chromium Molybdenum steels | SNCM | "M" for "Molybdenum" "M" f "M" | g High strength Brass castings | HBsCx |
| St | Manganese steels for structural use Manganese Chromium steels | SMn SMnC | n or anganese "C" for "Chromium" | Bronze castings | BCx |
| ls | Carbon tool steels | SK | "K" for "Kogu"-Japanese word meaning "tool" | Phosphorus Bronze castings | PBCx |
| Stee | Hollow drill steels | SKC | "C" for "Chisel" | Aluminium Bronze castings | AlBCx |
| ol | Alloy tool steel | SKS SKD SKT | S for "Special" D for "Die" T for "Tanzo"-Japanese word for "forging" | s Aluminium alloy castings | AC |
| ls To | High speed tool steels | SKH | "H" for "High speed" | ting Magnesium alloy castings | MC |
| Stee eels | Free cutting sulphuric steels | SUM | "M" for "Machinability" | Cas Zinc alloy die castings | ZDCx |
| ial s St | High Carbon Chromium bearing steels | SUJ | "J" for "Jikuuke"-Japanese word meaning "bearing" | Aluminium alloy die castings | ADC |
| pec inles | Spring steels | SUP | "P" for "Spring" | Magnesium alloy die castings | MDC |
| S Sta | Stainless Steels | SUS | "S" after "SU" is abbreviation for "Stainless" | White metals | WJ |
| t Steels | Heat-resistant steels | SUH | "U" for "Special Usage" and "H" for "Heat" | Aluminium alloy castings for bearings | AJ |
| esistan | Heat-resistant steel bars | SUH-B | "B" for "Bar" | Copper-Lead alloy castings for bearings | KJ |
| Heat-r | Heat-resistant steels sheets | SUHP | "P" for "Plate" | | |
| els | Carbon steel forgings for general use | SF | "F" for "Forging" | | |
| Ste | Carbon steel booms and billets for forgings | SFB | "B" for "Billet" | | |
| rged | Chromium Molybdenum steel forgings | SFCM | "C" for "Chromium" and "M" for "Molybdenum" | | |
| Fo | Nickel Chromium Molybdenum steel forgings | SFNCM | "N" for "Nickel" | | |
| Grey cast irons | FC | "F" for "Ferrous" and "C" for "Casting" | | |
| ns | Spherical graphite / Ductile cast irons | FCD | "D" for "Ductile" | | |
| t Iro | Blackheart malleable cast irons | FCMB | "M" for "Malleable" and "B" for "Black" | | |
| Cas | Whiteheart malleable cast irons | FCMW | "W" for "White" | | |
| Pearlite malleable cast irons | FCMP | "P" for "Pearlite" | | |
| ls | Carbon cast steels | SC | "C" for "Casting" | | |
| Stee | Stainless cast steels | SCS | "S" for "Stainless" | | |
| st | Heat-resistant cast steels | SCH | "H" for "Heat" | | |
| Ca | High Manganese cast steels | SCMnH | "Mn" for "Manganese" and "H" for "High" | | |