不锈钢301的全套机械性能

　　Mechanical Properties

　　Typical mechanical properties for grade 301 stainless steels are given in table A.

　　Table A. Mechanical properties of 301 grade stainless steel

　　Grade 301 Temper ASTM A666Tensile Strength (MPa) min.Yield Strength 0.2% Proof (MPa) min.Elongation (% in 50mm) (thick.>0.76mm) min.Bend Test (thickness > 1.27mm)

　　Bend Angle (°)Factor

　　Annealed51520540--

　　1/16 Hard620310401801

　　1/8 Hard690380401801

　　1/4 Hard86051525902

　　1/2 Hard103576018902

　　3/4 Hard120593012903

　　Full Hard12759659905

　　Bend test is around a diameter of the Bend Factor multiplied by the steel thickness.

　　Physical Properties

　　Typical physical properties for grade 301 stainless steels are given in table B.

　　Table B. Physical properties of 301 grade stainless steel

　　GradeDensity (kg/m3)Elastic Modu (GPa)Mean Coefficient of Thermal Expansion (mm/m/°C)Thermal Conductivity (W/m.K)Specific Heat 0-100°CElectrical Resistivity (nW.m)

　　0-100°C0-315°C0-538°Cat 100°Cat 500°C(J/kg.K)

　　30180001931717.218.216.221.5500720

　　Possible Alternative Grades

　　304 The lower work hardening rate of 304 is eptable, giving better ductility required for forming.

　　316 A higher corrosion resistance is required, and the lower work hardening rate of 316 can bepensated for.

　　Corrosion Resistance

　　Corrosion resistance is similar to that of 304. Good resistance in applications involving external exposure to mildly corrosive conditions at ambient temperatures.

　　Heat Resistance

　　Good oxidation resistance in intermittent service to 840°C and in continu service to 900°C, although notually chosen for this environment.

　　Heat Treatment

　　Solution Treatment (Annealing) - Heat to 1010-1120°C and cool rapidly.e low side of range for intermediate annealing. This grade cannot be hardened by thermal treatment.

　　Cold Working

　　Grade 301 and its low carbon variants areed where a high strength stainless steel is required. The grades work harden at the very high rate of approximately 14MPa/%Ra (14MPa increase in tensile strength for each 1% reduction of area of cold work), resulting in high achievable strengths from cold rolling and from roll forming. The strain-hardened tenite is at least partially transformed to martensite by this work. Despite the high strengths achieved there is still enough residual ductility to enable severe cold deformation. Although non-maic in the annealed condition, when cold worked the grade bes strongly attracted to a ma.

　　Welding

　　Good characteristics suited to all standard methods. Grade 308L filler rod is rmended. Welds in Grade 301 t be annealed for maximum corrosion resistance; this is not necessary in 301L or 301LN. Welding and post weld annealing will both remove high strength induced by prior cold rolling.

　　Spot welding ismonlyed to assemble cold rolled 301ponents. The very small heat affected zone associated with this rapid welding technique results in little reduction of overallponent strength.

　　Applications

　　Typical applications include:

　　· Rail car structuralponents - often roll formed, brake pressed or stretch formed to profiles but alsoed flat.

　　· Airframe sections

　　· Highway trailerponents

　　· Automotive wheel covers

　　· Wiper blade holders and clips

　　· Toaster springs

　　· Stove element clips

　　· Screen frames

　　· Curtain walls