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Glossary » Materials » Alloys » Steel » Stainless Steel » PH 13-8Mo
PH 13-8Mo is a Precipitation-Hardening Standard grade Stainless Steel. It is composed of (in weight percentage) 0.05% Carbon (C), 0.10% Manganese (Mn), 0.10% Silicon (Si), 12.25-13.25% Chromium (Cr), 7.5-8.5% Nickel (Ni), 0.01% Phosphorus (P), 0.008% Sulfur (S), 2.0-2.5% Molybdenum (Mo), 0.90-135% Aluminum (Al), 0.01% Nitrogen (N), and the base metal Iron (Fe).
Steel is the common name for a large family of iron alloys. Steels can either be cast directly to shape, or into ingots which are reheated and hot worked into a wrought shape by forging, extrusion, rolling, or other processes. Wrought steels are the most common engineering material used, and come in a variety of forms with different finishes and properties. Stainless steels are high-alloy steels that have superior corrosion resistance than other steels because they contain large amounts of chromium. Stainless steels contains at least 10% chromium, with or without other elements. Stainless steels can be divided into three basic groups based on their crystalline structure: austenitic, ferritic, and martensitic.

The typical elastic modulus of stainless steels at room temperature (25°C) ranges from 190 to 210 GPa. The typical density of stainless steels ranges from 7.75 to 8.1 g/cm3. The typical tensile strength varies between 515 and 827 MPa. The wide range of ultimate tensile strength is largely due to different heat treatment conditions.