ALLOY STAINLESS 253Ma STEEL PLATE

 

 

 

Here is the detailed analysis of Alloy 253Ma stainless steel plate performance in high-temperature strength environments:

I. Material Background

Alloy 253Ma is a precipitation-strengthened austenitic stainless steel, characterized by high chromium (Cr 20–22%), medium nickel (Ni 10–12%), and additions of nitrogen (N 0.14–0.20%) and niobium (Nb 0.1–0.2%). It is primarily used for high-temperature oxidation resistance and thermal strength.

 

International Grade Equivalents:

UNS: S30815

EU Grade: 1.4835

II. Core High-Temperature Strength Properties

1. High-Temperature Mechanical Strength

Tensile & Yield Strength:
Within the 600–800°C range, 253Ma maintains significant strength:

At 600°C: Tensile strength ≥ 500 MPa, yield strength ≥ 230 MPa

At 800°C: Tensile strength ≥ 300 MPa, yield strength ≥ 120 MPa (Data from ASTM A240)
Compared to common austenitic stainless steels (e.g., 304), its high-temperature strength decays more slowly, with distinct advantages in the 500–900°C range.

 

 

 

 

 

 

 

Creep & Stress Rupture Strength:
Under long-term high-temperature loading, 253Ma excels in creep resistance. For example, at 700°C/100 MPa, its creep rupture elongation after 10,000 hours is ≤1%, making it suitable for high-temperature structures requiring creep resistance (e.g., boiler components).

 

 

 

 

 

 

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