ASTM A714 Grade III seamless steel pipe/tube, high-strength low-alloy steels have enhanced resistance to general atmospheric corrosion by weathering as commonly encountered in rural, urban, marine, and industrial environments. A714 Grade III pipe are supplied in two classes: Class 2, having corrosion resistance equivalent to that of carbon A714 Grade III steel with copper (0.20 minimum Cu); and Class 4, having corrosion resistance substantially better than that of Class 2. Class 4 A714 Grade III steels when properly exposed to the atmosphere can be used bare (unpainted) for many applications.
ASTM A714 Grade III Seamless Steel Pipe Chemical Composition Analysis:
| Grade | Cr | Mn | P | S | Si | C | V | Ni | Ch | Mo |
| A714 Grade III | 0.27 | 1.40max | 0.05max | 0.06 | 0.35max | 0.18min | 0.01min | -- | -- | -- |
ASTM A714 Grade I Seamless Steel Tube Mechanical Properties:
| Grade | Tensile strength, min, psi(MPa) | Yield strength, min, psi(MPa) | Elongation in 2 in.(50.8mm) min, % | Elongation in 8 in.(203.2mm) min, % |
| A714 Grade III | 65 000(450) | 50 000(345) | 20 | 18 |
A714 Grade III Seamless theoretical weight: seamless calculation formula: (OD-Wall thickness) × thickness × 0.02466= Seamless weight per meter
Process Method:
1.Cold Drawn
2.Cold rolled
3.Hot rolled
4.Hot expanded
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