Welding Characteristics of 13CrMo44 Steel

13CrMo44 steel generally has the following characteristics during welding:
1. Hardenability
The hardenability of steel depends on its carbon content and alloy composition content. Chromium and molybdenum, the main alloying elements in 13CrMo44 steel, can significantly improve the hardenability of 13CrMo44 steel, especially the effect of molybdenum, which is delay the transformation of 13CrMo44 steel during cooling and improve the stability of supercooled austenite.

2. Eliminate stress and treat crack tendency
The tendency of 13CrMo44 steel welded joints to eliminate stress cracks mainly depends on the characteristics and content of carbide-forming elements in 13CrMo44 steel, which often occur in the coarse-grained section of the welding heat-affected zone. Such cracks are generally formed in the temperature range of 500-700°C. Preheating before welding and reasonable heat treatment after welding can effectively avoid the possibility of cracks in the 13CrMo44 steel staying in the sensitive temperature zone for too long.

3. Temper brittleness
Temper brittleness refers to the phenomenon of severe embrittlement of 13CrMo44 steel and welded joints during long-term operation in the 350-500 temperature range.