The difference of Stainless Steel Grade 304 A2 and 316 A4 Chemical Composition Element
The difference of Stainless Steel 304 A2 and 316 A4 Chemical Composition
"304 A2-70" : A2 means Grade 304 material, 70 means the Tensile Strength 700MPA
"316 A4-70" : A4 means Grade 316 material, 70 means the Tensile Strength 700MPA
"316 A4-80" : A4 means Grade 316 material, 80 means the Tensile Strength 800MPA
We always mark it on the head of stainless steel fasteners for your easily understanding what's the material,please check it below.
SGS TEST REPORT of 316L Material JARING Bolts and Nuts
Use Portable High Intensity X Ray Beam to Analyze JARING SS304 Bolts and Nuts
We also can use Portable Hihg Intensity X Ray Beam to check the stainless steel bolts,nuts,screws chemical element easily and quickly by ourself.
SS304 VS SS316 : Chemical Composition
Most of our clients don't know the difference between stainless steel 304 and 316.
We have made a form to show the different chemical components clearly.
| ELEMENT % | SS304 | SS316 / SS316L |
| Carbon (C) | Max 0.08 |
316 Max 0.08 316L Max 0.03 |
| Chromium (Cr) | 18.0~20.0 | 16.0~18.0 |
| Manganese (Mn) | Max 2.0 | Max 2.0 |
| Nickel (Ni) | 8.0~10.0 | 10.0~14.0 |
| Phosphorus (P) | Max 0.045 | Max 0.045 |
| Sulphur (S) | Min 0.03 | Min 0.03 |
| Silicon (Si) | 1.00 | 1.00 |
| Molybdenum (Mo) | / | 2.0~3.0 |
| Iron (Fe) | Balance | Balance |
