Used RAILS

R50 GOST 7173-75 weight 51.67KG/Meter

R65 GOST 8165-75 Weight 64.72KG/Meter

C: 0.06 – 0.082%

Mn: 0.75 – 1.05%

SI: 0.13 – 0.28%

P: Max 0.035%

S: Max 0.045%

Ar: Max 0.15%