Relevance

Stainless steel grade AISI 316 L is an improved version of AISI 316 with molybdenum additive and higher nickel content, which enhances the steel resistance to aggressive media. The main use of this grade is the production of equipment that operates in harsh environments. AISI 316 L steel has excellent formability, is well welded and has high corrosion resistance in a wide range of aggressive environments. Molybdenum protects against crevice and pitting corrosion in sea water, chlorinated water, acetic acid vapors and polluted gas atmosphere. AISI 316 L has a higher strength and better creep resistance at high temperatures than AISI 304 and has excellent mechanical and corrosion properties at sub-zero temperatures. AISI 316 L is also used in cases where there is a risk of corrosion in the welded peri-seam area, at 550 - 800 °C;.

Application

Due to high workability, resistance to oxidation and corrosion, excellent mechanical properties, AISI 316 L has a wide range of applications. It is used in chemical and pharmaceutical industry, machine building, oil, processing and food industries, mining, production of heat exchangers , etc.

The percentage composition of .

Aisi	C	Mn	P	S	Si	Cr	Ni	Mo	Ti
316L-316Ti	0.03	2.0	0.045	0.030	1.0	16.0 to	10.0 to	2.00 to	- 0.5

Mechanical characteristics of AISI 316 L steel at room temperature.

Steel grade	Min	Typical
Elastic limit (0.2%) (fluidity), in N/mm2 Rp0.2	205	320
Tensile strength in N/mm2, Rp m	515	600
elongation in % (L = 5.65 So)	40	50
Eriksen organoleptic test, in mm	-	-
Brinell hardness HB	Min	165
Fatigue resistance, in N/mm2	205	260

Physical and mechanical properties of AISI 316 L steel.

Melting point	Density	Tensile strength	Elongation	Yield strength (0.2% displacement)
1400 °C; C (2550 °C; F)	8.0 g/cm³	515 MPa, Psi - 75,000	35%	205 MPa, Psi - 30,000

Minimum value of elastic limit at high temperatures (strain in 10,000 h 1% at a given temperature)

Temperature,°C	550	600	650	700	800	Time
Rp1.0 1.0% plastic strain (fluidity), N/mm2	120	80	50	30	10	10 000 ч
Rp1.0 1.0% plastic strain (fluidity), N/mm2	120	80	50	25	5	100 000 ч

Characteristics of AISI 316 L steel at high temperatures

Ultimate strength at elevated temperature

Tensile strength, Rp m N/mm2	380	270	170	90	50
Temperature, °C	600	700	800	900	1000

Dross formation temperature:

-Intermittent exposure 850°C

-continuous exposure 925°C

Characteristics of AISI 316 L steel at low temperatures:

Temperature	°C	-161	-78	-196
Elastic limit, (0.2%), Rp0.2 (yield stress) N/mm2	N/mm2	380/220	300/180	400/220
Ultimate tensile strength, Rp m, N/mm2	N/mm2	1450/1200	1100/950	1600/1350
Impact toughness	J	160/160	180/175	155/150

Code:

- Corrosion rate less than 100 mm/year. High degree of protection = 0
- Corrosion rate 100m - 1000 mm/year. Partial protection = 1
- Corrosion rate greater than 1000 mm/year. Non resistant = 2

Corrosion resistance.

-acidic media.

Examples for some acid solutions and acids

Concentration, to mass in %	10	20	40	60	80	100
Nitric acid	0	0	0	0	1	2
Formic acid	0	1	2	2	1	0
Sulfuric acid	2	2	2	2	2	2
Phosphoric acid	0	0	0	0	1	2

Concentration, to mass in %	10	20	40	60	80	100
Nitric acid	0	0	0	0	2	0
Formic acid	0	0	0	0	0	0
Sulfuric acid	2	2	2	2	1	0
Phosphoric acid	0	0	0	0	0	2

Heat treatment

Annealing at up to 1120 °C with water or cold air cooling ensures maximum processability of the steel. The best corrosion resistance is achieved by annealing at 1070 °C with abrupt cooling. The stress relief (tempering) at 500-600°C for one hour increases the risk of sensitization. The best temperature for stress relief is up to 400°C. Forging of semi-finished products is done at temperatures between 1250 °C and 900 °C, followed by annealing. The time required for uniform heating of stainless steel is 10 to 12 times longer than for carbon steels.

Cold work

This steel is both strong and ductile. Cold work includes tensile forming, bending, rotary drawing and deep drawing. Cold working uses the same tools and techniques as for carbon steel. However, the applied mechanical forces increase by 1.5-2 times. This is due to the hardening of austenitic steel during shaping.

Buy at the best price

Evek GmbH has a wide range of AISI 316 L steel products in stock. Our representative offices are located. You can make a purchase without leaving your office, through the Company's website. The popularity of AISI 316 L products is explained by a variety of assortment and low cost. All the products have the highest quality. Technological completeness of each stage of production makes it possible for us to fulfill individual orders in case you are not satisfied with the basic execution of the product. We carry out high quality individual orders of non-standard parameters, the timing of their implementation is minimal. In case of bulk purchases we provide discounts.