Chemical composition:

Grade C Si Mn P S       Ni Cr   Mo
201 ≤0.15 ≤0.75 5.5-7.5 ≤0.06 ≤0.03 3.5-5.5 16.0-18.0
202 ≤0.15 ≤1.0 7.5-10.0 ≤0.06 ≤0.03 4.-6.0 17.0-19.0
301 ≤0.15 ≤1.0 ≤2.0 ≤0.045 ≤0.03 6.0-8.0 16.0-18.0
302 ≤0.15 ≤1.0 ≤2.0 ≤0.035 ≤0.03 8.0-10.0 17.0-19.0
304 ≤0.08 ≤1.0 ≤2.0 ≤0.045 ≤0.03 8.0-10.5 18.0-20.0
304L ≤0.03 ≤1.0 ≤2.0 ≤0.035 ≤0.03 9.0-13.0 18.0-20.0
309S ≤0.08 ≤1.0 ≤2.0 ≤0.045 ≤0.03 12.0-15.0 22.0-24.0
310S ≤0.08 ≤1.5 ≤2.0 ≤0.035  ≤0.03 19.0-22.0 24.0-26.0
316 ≤0.08 ≤1.0 ≤2.0 ≤0.045 ≤0.03 10.0-14.0 16.0-18.0 2.0-3.0
316L ≤0.03 ≤1.0 ≤2.0 ≤0.045 ≤0.03 12.0-15.0 16.0-18.0 2.0-3.0
321 ≤0.08 ≤1.0 ≤2.0 ≤0.035 ≤0.03 9.0-13.0 17.0-19.0
904L ≤2.0 ≤0.045 ≤1.0 ≤0.035 23.0-28.0 19.0-23.0 4.0-5.0
2205 ≤0.03 ≤1.0 ≤2.0 ≤0.030 ≤0.02 4.5-6.5 22.0-23.0 3.0-3.5
2507 ≤0.03 ≤0.80 ≤1.2 ≤0.035 ≤0.02 6.0-8.0 24.0-26.0 3.0-5.0
2520 ≤0.08 ≤1.5 ≤2.0 ≤0.045 ≤0.03 0.19-0.22 0.24-0.26
410 ≤0.15 ≤1.0 ≤1.0 ≤0.035 ≤0.03 11.5-13.5
430 0.12 ≤0.75 ≤1.0 ≤0.040 ≤0.03 ≤0.60 16.0-18.0

Differences Between 316 And 316L

316L is very similar to 316 in almost every aspect. there both are durable, corrosion-resistant, and a good choice for high-stress applications, in practice, dual certified grade 316/316L is often required.

However, the “L” designation means 316L steel has less carbon than 316 steel, it is less susceptible to sensitization, a condition caused when carbon combines with chromium around the grain boundaries, depleting the grain boundary areas of chromium during welding process, though it can be resisted via annealing.

316L stainless steel also is great choice for high-temperature, high-corrosion applications, particularly for marine projects.