Tenform XF450 - Tata Steel in the automotive industry

Tenform XF450Table 4: Mechanical properties of the spot weld in figure 4Grade General Lap shear Cross tensionThickness Welding Max Failure Failure Failure Failurerange weld size strength mode strength mode3.5√t-splash 5√t 5√t(mm) (kA) (mm) (kN) (kN)XF450 2.9 4 9.41 26.4 Face 23 PlugNote: Material thickness, t, is in millimetres.High strain rate propertiesTable 5: Strain rate values: 2.9mm Tenform XF450Strain rate R p0.2 R m (max)(1/s) (N/mm 2 ) (N/mm 2 )0.001 505 646100 600 730Notes: Strain rate values were calculated using Bergström law.FatigueFigure 5: Weld fatigue curves for Tenform XF450Load range (kN)10.510.09.59.08.58.07.57.06.56.05.55.04.5Key10 4 10 5 10 6 10 7Data point Tenform XF450:• 3.5√t• 4√tRunout curve Tenform XF450:3.5√t4√tFitted Tenform XF450:3.5√t: F = 29.66x -0.118324√t: F = 33.97x -0.1158Cycles to failure (N f )Note: Curves were determined using uniaxial high-cycle fatigue testingon spot-welded samples with a ratio of maximum load to minimum load(R value) of 0.1. The dimensions of the fatigue samples are shown infigure 6.

Tenform XF450Figure 6: Dimensions of samples used for SN spot-weld fatigue curvesPosition of welds110±150±1tt48±1Packing piece25±0.511.5±0.5Packingpiecett10±0.520±0.5100±5200±2.5Notes:1. ‘t’ is material thickness.2. Dimensions are in millimetres.Figure 7: SN fatigue curves for Tenform XF450Stress range (MPa)700650600Health and safetyTenform XF450 is covered by Product health and safetydata sheet no. 2.More informationFor more information about this product, contact Corusat the appropriate address on the back cover.55050045010 4 10 5 10 6 10 7Cycles to failure (N f )Key• Data point Tenform XF450Runout Tenform XF450Fitted curve: = 1379.891Nf -0.065551% certainty of survival: (1%) = 1438.112x -0.0655599% certainty of survival: (99%) = 1324.0271x -0.06555Note: Curves were determined using uniaxial high-cycle fatigue testingwith a ratio of maximum load to minimum load (R value) of –1.

www.corusgroup.comTenform is a trademark of Corus UK Limited.Care has been taken to ensure that thisinformation is accurate, but Corus Groupplc, including its subsidiaries, does notaccept responsibility or liability for errors orinformation which is found to be misleading.Copyright 2005 Corus UK LimitedDesign: ELEVATOR www.elevatordesign.co.ukCommercial enquiriesCorus Strip Products UKPO Box 10NewportSouth WalesNP19 4XNT: +44 (0)1633 290022F: +44 (0)1633 755064cspuk.marketing@corusgroup.comwww.corusgroup.com/stripproductsukTechnical enquiriesCustomer Technical ServicesCorus Strip Products UKPO Box 10NewportSouth WalesNP19 4XNT: +44 (0)1633 755171F: +44 (0)1633 755177strip.enquiries@corusgroup.comwww.corusgroup.com/stripproductsukEnglish language versionCSPUK17:1000:UK:07/2005