More Efficient Date Conversion

I have a function which works that converts getdate() to a 8 character string. I have tried others ways but this one works OK. However the more I look at it the more I think a more efficient way has to exist. Any ideas greatly appreciated. Here is my approach

declare @order_date char(8), @year char(4), @month char(2), @day char(2)
set @year = cast(datepart(yyyy,getdate()) as char(4))
if datepart(dd,getdate())<10 set @day = '0'+cast(datepart(dd,getdate()) as char(2)) else set @day = cast(datepart(dd,getdate()) as char(2))
if datepart(mm,getdate())<10 set @month = '0'+cast(datepart(mm,getdate()) as char(2)) else set @month = cast(datepart(mm,getdate()) as char(2))
set @order_date = @year + @month + @day select @order_date