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Meets MIL-T-6736
Round metal tubing for use in aircraft and transportation
4130 steel is a SAE steel grade as specified by the Society of Automotive Engineers (SAE). Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common variant stylings include chrome-moly, cro-moly, CrMo, CRMO, CR-MOLY, and similar). They have an excellent strength to weight ratio and are considerably stronger and harder than standard 1020 steel. While these grades of steel do contain chromium, it is not in great enough quantities to provide the corrosion resistance found in stainless steel. Examples of applications for 4130 include structural tubing, bicycle frames, tubes for transportation of pressurized gases, firearm parts, clutch and flywheel components, and roll cages. These steels are also used in aircraft parts and therefore 4130 grade structural tubing is sometimes referred to as "aircraft tubing". 4130 steel is a SAE steel grade as specified by the Society of Automotive Engineers (SAE). Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common variant stylings include chrome-moly, cro-moly, CrMo, CRMO, CR-MOLY, and similar). They have an excellent strength to weight ratio and are considerably stronger and harder than standard 1020 steel. While these grades of steel do contain chromium, it is not in great enough quantities to provide the corrosion resistance found in stainless steel. Examples of applications for 4130 include structural tubing, bicycle frames, tubes for transportation of pressurized gases, firearm parts, clutch and flywheel components, and roll cages. These steels are also used in aircraft parts and therefore 4130 grade structural tubing is sometimes referred to as "aircraft tubing".