On the basis of 316L, many kinds of steel are also derived. For example, 316Ti is derived after adding a small amount of Ti, 316N is derived after adding a small amount of N, and 317L is derived by increasing the content of Ni and Mo.
Most of the existing 316L in the market are produced according to American standards.
For cost consideration, steel mills generally put the Ni content of products as far as possible by the lower limit.
The American standard stipulates that the Ni content of 316L is 10 ~ 14%, while the Japanese standard stipulates that the Ni content of 316L is 12 ~ 15%.
According to the minimum standard, there is a 2% difference between the American standard and Japanese standard in the Ni content, which is still quite huge in the price. Therefore, customers still need to see clearly when buying 316L products, whether the products refer to ASTM or JIS standards.
The Mo content of 316L makes the steel have excellent pitting resistance and can be safely used in environments containing Cl- and other halogen ions.
Because 316L is mainly used for its chemical properties, steel mills have slightly lower requirements for surface inspection of 316L (relative to 304), and customers with higher surface requirements should strengthen surface inspection.
The most commonly used two kinds of stainless steel 304,316L (or corresponding to the German/European standard 1.4308,1.4408), 316L and 304 in the chemical composition of the most important difference is that 316L contains Mo, and generally recognized, 316L corrosion resistance is better, more corrosion resistance than 304 in high temperature environment.
Therefore, in the high temperature environment, engineers generally choose parts made of 316L materials.
Equivalent Grades
| Grade |
Euronorm |
China GB |
Japanese JIS |
| |
No. |
|
|
| 316L |
1.4404 |
022Cr17Ni12Mo2 |
SUS316L |
Standard Specification
| Thickness |
0.1mm-12mm |
| Width |
1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc |
| Length |
Customized |
| Surface |
2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc |
| Finish |
Hot rolled coil (HR), Cold rolled coil (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| Form |
Round hole, square hole, diamond hole, hexagonal hole, waist round hole, rectangular hole, triangular hole, pattern hole, non-standard hole, large and small holes, gradient hole, cross hole, plum blossom hole |
Composition content
| Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
| 316L |
Min.
Max. |
≤0.03 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.03 |
16.00～18.00 |
2.00～3.00 |
10.00～14.00 |
|
Tensile strength σb (MPa) : ≥480
Conditional yield strength σ0.2 (MPa) : ≥177
Elongation Δ5 (%) : ≥40
Section shrinkage ψ(%) : ≥60
Hardness: 187 hb or less;
90 HRB or less;
200 hv or less
Density: 7.98g/cm3;
Specific heat capacity ratio (20℃) : 0.502J/(g*K)
Characteristic machining technology
2B -- Silver white with better gloss and flatness than a 2D surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + quenching and tempering rolling.
Ba - Excellent surface gloss, high reflectivity, like a mirror surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + surface polishing + quenching and tempering rolling.
No.3 -- Good gloss, coarse grain surface.
Processing technology: polishing and tempering rolling for 2D or 2B with 100~120 abrasive materials (JIS R6002).
No.4 -- Good gloss, fine lines on the surface.
Processing process: polishing and tempering rolling for 2D or 2B with 150~180 abrasive materials (JIS R6002).
HL -- Silver grey with hair streaks.
Processing technology: 2D products or 2B products with appropriate granularity of abrasive materials for polishing the surface is a continuous abrasive grain.
MIRRO -- Specular.
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