55SiMnMoV
Alloy Steel55SiMnMoV
55SiMnMoV grade supplied by Shanxi Youte Steel (jlhsteel.net).
Chemical Composition (%)
| C | 0.52 |
|---|---|
| SI | 0.9 |
| MN | 1 |
| P | 0.04 |
| S | 0.04 |
| CR | 0.35 |
| CU | 0.2 |
| W | 0.2 |
Available Forms
Bar, Plate, Tube, Forging, Wire
Uses
Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈0.35%) improves hardenability, wear and corrosion resistance. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.
Heat Treatment
Austenitize at 760–820 °C and quench (oil/water) then temper at 150–400 °C for high hardness; spheroidize anneal (680–720 °C) improves machinability of the as-rolled bar.
Precautions
Preheat and control interpass temperature when welding; post-weld heat treatment or stress relief is recommended to avoid hard-zone cracking. Use low-hydrogen electrodes. Protect from decarburization during heating (controlled atmosphere or protective coating).
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