INCOLOY 800 and SS 310
What is the difference between INCOLOY 800 and SS 310?
Incoloy 800 is a nickel-iron-chromium alloy that contains aluminum and titanium for enhanced resistance to corrosion and oxidation. Its high nickel content gives it excellent strength at high temperatures. SS310 is a high-chromium, high-nickel stainless steel that also contains molybdenum.
What is the difference between Incoloy 800 and 800H?
The creep strength and rupture strength of INCOLOY 800H and 800HT alloys are significantly higher than that of INCOLOY 800 alloy. The chemical composition limits of these three alloys are almost the same. As shown in Table 1, the basic elements of these three alloys are the same.

What grades of INCOLOY 800 are available?
New terminology, "Grade 1, annealed at approximately 1800°F (980°C)" and "Grade 2, annealed at approximately 2100°F (1150°C)" has been introduced. The specification case covers Parts I and VIII and lists the design stresses at 1100°F (593°C) for Grade 1 and 1500°F (816°C) for Grade 2.
Which is better, SS 310 and SS316?
If high temperatures are a concern, 310 stainless steel may be a better choice. For corrosive environments, especially those containing chlorides, 316 stainless steel is preferred.
Composition
Incoloy 800 is a nickel-iron-chromium alloy that contains aluminum and titanium for greater resistance to corrosion and oxidation. Its high nickel content gives it excellent strength at high temperatures. On the other hand, SS310 is a high-chromium and high-nickel stainless steel that also contains molybdenum. This allows it to withstand corrosive environments and high temperatures. While both alloys contain chromium and nickel, Incoloy 800 has more of the elements.
Heat Resistance
In terms of heat resistance, Incoloy 800 is a better choice for high temperature applications. The alloy can withstand temperatures up to 1100°C and is used in industrial furnaces, heat exchangers, and chemical processing equipment. SS310 also has good heat resistance up to 1150°C and is used to make furnace linings, kilns, and heat treatment baskets.
Strength
Incoloy 800 has excellent high temperature strength and is often used in heat exchangers and petrochemical applications. Its high nickel content gives it good creep rupture strength for extreme temperature environments. SS310 also has good high temperature strength due to its high nickel and chromium content.
Conclusion
Gnee Steel is a supplier of INCOLOY 800 And SS 310, including tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extrusions. We work with steel mills to provide customers with 625 alloy, and its products meet or exceed many leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN and BS standards.
Gnee Steel stocks and sells INCOLOY 800 And SS 310 tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extrusions. You are welcome to contact us for a quote at any time at ss@gneesteel.com





