Low alloy steels can contain up to how much chromium?

Low alloy steels can contain up to how much chromium?

• A. 12%
• B. 5%
• C. 15%
• D. 9%

Answer: (D)

In steel classifications, a practical line separates low alloy steels from stainless steels based on chromium content: stainless steels generally have enough chromium to reach about 10% or more, which provides the durable, self-healing oxide layer that gives stainless corrosion resistance. Keeping chromium below that threshold keeps the steel in the low alloy category, and a commonly cited upper limit for chromium in low alloy steels is 9%. So, up to 9% chromium maintains the low alloy designation, while higher amounts (around 12% or 15%) would push into stainless territory. The option 5% is below the limit but does not reflect the commonly quoted maximum used to define low alloy steels, hence 9% is the best answer.

In steel classifications, a practical line separates low alloy steels from stainless steels based on chromium content: stainless steels generally have enough chromium to reach about 10% or more, which provides the durable, self-healing oxide layer that gives stainless corrosion resistance. Keeping chromium below that threshold keeps the steel in the low alloy category, and a commonly cited upper limit for chromium in low alloy steels is 9%. So, up to 9% chromium maintains the low alloy designation, while higher amounts (around 12% or 15%) would push into stainless territory. The option 5% is below the limit but does not reflect the commonly quoted maximum used to define low alloy steels, hence 9% is the best answer.