不銹鋼301的全套機(jī)械性能

1、不銹鋼301(SUS 301)的全套機(jī)械性能時(shí)間：2008-01-08 13:55:11 | 不銹鋼301(SUS 301)的全套機(jī)械性能X.H. SUS301系列不銹鋼的資料，一直只有局部資料，對(duì)它沒(méi)有一個(gè)完整的認(rèn)識(shí)；在找到這些資料后，情 況得以改善。以下資料涵蓋了 SUS301從退火狀態(tài)到全硬的材質(zhì)的主要機(jī)械性能。不過(guò)，如果可能的話，讓你們公司的鋼材供應(yīng)商提供相關(guān)資料更準(zhǔn)確。讓第三方檢測(cè)實(shí)驗(yàn)室、材料研究室 提供材料性能報(bào)告，也是一個(gè)很好的措施一一只是很多公司不愿這個(gè)投資。從自己的經(jīng)驗(yàn)里來(lái)看，結(jié)合以下資料和其硬度，可以很好的得出比較準(zhǔn)確的結(jié)果。測(cè)硬度就簡(jiǎn)單了，一般 的公司應(yīng)該都有?！颈綛lo

2、g里有詳細(xì)的硬度講解和各種硬度轉(zhuǎn)換表，請(qǐng)參考?！縈echanical PropertiesTypical mechanical properties for grade 301 stainless steels are given in table A.Table A. Mechanical properties of 301 grade stainless steelGrade 301 Temper ASTMA666Tensile Strength (MPa)min.Yield Strength 0.2% Proof(MPa) min.Elongation (% in 50mm) (thic

3、 k.0.76mm) mi n.Bend Test (thickness 1.27mm)Bend AngleFactor( )Annealed515205401/16 Hard6203104018011/8 Hard6903804018011/4 Hard860515259021/2 Hard1035760189023/4 Hard120593012903Full Hard12759659905Bend test isaround a diameterof the Bend Factor multiplied by thesteel thickness.Physical PropertiesT

4、ypical physical properties for grade 301 stainless steels are given in table B.Table B. Physical properties of 301 grade stainless steely)(kg/mElastic Modulus(GPa)Mean Coefficient of Thermal Expansion (四m/m/ C)Thermal Conductivity(W/m.K)Specift 0-1 (J/kg.ic00K)ElsiQ0-100 C0-315 C0-538 Cat 100 Cat 50

5、0 C1931717.218.216.221.550072Possible Alternative Grades304 The lower work hardening rate of 304 is acceptable, giving better ductility required fo r forming.316 A higher corrosion resistance is required, and the lower work hardening rate of 316 can be compensated for.Corrosion ResistanceCorrosion r

6、esistance is similar to that of 304. Good resistance in applications involving external exposure to mildly corrosive conditions at ambient temperatur es.Heat ResistanceGood oxidation resistance in intermittent service to 840 C and in continuous se rvice to 900 C, although not usually chosen for this

7、 environment.Heat TreatmentSolution Treatment (Annealing) - Heat to 1010-1120 C and cool rapidly. Use low side of range for intermediate annealing. This grade cannot be hardened by therm al treatment.Cold WorkingGrade 301 and its low carbon variants are used where a high strength stainless s teel is

8、 required. The grades work harden at the very high rate of approximately14MPa/%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 rol l forming. The strain-hardened austenite is at least partially tran

9、sformed to ma rtensite by this work. Despite the high strengths achieved there is still enoughresidual ductility to enable severe cold deformation. Although non -magnetic in the annealed condition, when cold worked the grade becomes strongly attracted toa magnet.WeldingGood characteristics suited to

10、 all standard methods. Grade 308L filler rod is re commended. Welds in Grade 301 must be annealed for maximum corrosion resistance;this is not necessary in 301L or 301LN. Welding and post weld annealing will bo th remove high strength induced by prior cold rolling.Spot welding is commonly used to as

11、semble cold rolled 301 components. The very s mall heat affected zone associated with this rapid welding technique results in little reduction of overall component strength.ApplicationsTypical applications include:Rail car structural components - often roll formed, brake pressed or stretc h formed to profiles