Name

Railroad clip

Type

E clip (e1809, e2006,e2007,e2009,etc)

Skl clip (skl1,skl3,skl12,skl14)

 or the type by customers' drawings

Material

60Si2MnA

60Si2CrA

55Si2Mn

38Si7

Chemical composition(%)

C:0.56-0.64, Mn:0.60-0.90, Si:1.60-2.00, Cr:0.35, P:0.03, S:0.03

C:0.56-0.64, Mn:0.40-0.70, Si:1.40-1.80,Cr:0.70-1.00 P:0.03, S:0.03

C:0.52-0.60, Mn:0.60-0.90, Si:1.50-2.00,Cr:0.35  P:0.03, S:0.03

C:0.35-0.42, Mn:0.50-0.80, Si:1.50-1.80, P:0.03, S:0.03

Hardness

for e clip: 44-48HRC

for skl clip: 42-47HRC

Fatigue life

for Dia.18 is 3 millions cycles without breaking  

for Dia.20 is 5 millions cycles without breaking

Surface

Plain (oiled), Oxide black, color painting, HDG, Zinc Plating...

Standard refers

DIN17221, BS970, GB/T1222