ASTM A519 SEAMLESS STEEL TUBES, by DOM production,
with the steel grade of SAE4140 and SAE4130,
other alloy steel grade upon customer's agreement.:

SAE4130:
C: 0.28-0.33%
Mn: 0.40-0.60%
P max 0.40%
S max 0.40%
Si: 0.15-0.35%
Cr: 0.80-1.10%
Mo: 0.15-0.25%

SAE4140:
C: 0.38-0.43%
Mn: 0.75-1.00%
P max 0.40%
S max 0.40%
Si: 0.15-0.35%
Cr: 0.80-1.10%
Mo: 0.15-0.25% 

Sizing Method:
1. HF- hot finished
2.CW-cold worked

Themal Heattreatments:
1. A-Annealed
2. N-Normalized
3. QT-Quenched and Tempered
4. SR-Stress Relieved or Finish Anneal

Detail mechanical properties please refer to our sales team.
Please specify the data if you have detail requirement on Mechanical properties.