A519 Gr.4130 standards applicated in the seamless alloy pipe. Its performance is much higher than the average of seamless steel tubes, because the steel contains Cr more inside, alloy seamless pipe, its high temperature, low temperature resistance, corrosion resistance is smaller than other seamless. Especially, it need to do the quenched & tempered and has a high technical requirements. so alloy tube in the petroleum, chemical, electric power, boiler and other industries use more widely. 

Chemical composition (%)

Grade C Mn P S Si Cr Mo
4130 0.28-0.33
0.40-0.60
0.035
0.04
0.15-0.35
0.80-1.10
0.15-0.25

Mechanical properties (Mpa)

Grade
Tenslle strength
Yield strength
Elongation
RB
4130
785 930 12 229