1.4833 - AISI 309S tube

International Equivalent

Mark	Analogue	W. Nr.	Aisi Uns	En	Order
08Х23Н13		1.4833	309S	X12CrNi23-13	Delivery from the stock, in stock

Characteristics

AISI 309S is a heat-resistant, high-temperature resistant steel. Intense scaling begins at 1,050 °C. The high nickel and chromium content provides excellent oxidation resistance and high strength at high temperature. This steel grade is very malleable and has good weldability - characteristic for a wide range of applications. AISI 309S can be used in resistance heating elements. The recommended use temperature should not exceed 1000 °C. Above 800 °C, AISI 309S is prone to embrittlement due to scale formation.

Applications

Widely used in all high-temperature applications where considerable corrosion resistance, heat resistance and creep resistance are required. The steel is designed for parts operating at high temperature in a lightly loaded condition (cementation boxes, furnace conveyors, furnace fittings with operating temperatures up to 950°C), oil and gas, chemical, mining and metallurgical industries.

Percent composition.

Grade. Analogues	Ni	N	Mo	V	Ti	Cu	C	Si	Mn	P	S	Cr	W	Fe
309S	12,0 - 15,0						<0,08	<1,5	<2,0	<0,045	<0,030	22,0 - 24,0		Base
1.4833	12,0 - 14,0	<0,11					<0,15	<1,0	<2,0	<0,045	<0,015	22,0 - 24,0		Base
20x23n13	12,0 - 15,0		<0,3	<0,2	<0,2	<1,00	<0,20	<1,0	<2,0	<0,035	<0,025	22,0 - 25,0	<0,2	Basis

High temperature properties of AISI 309S

Tensile strength at elevated temperatures

Tensile strength, Rp m N/mm2	390	329	280	230	190	140
Temperature, °C	600	650	700	750	800	850

Mechanical characteristics of AISI 309S steel at room temperature.

Properties	Minimal	Typical
Tensile strength Rp 0.2, (0.2%), N/mm2 (ductility)	205	280
Tensile strength Rp m, N/mm2	515	580
Tensile strain A80 to break in %	40	60
Fatigue strength, N/mm2	-	260
Brinell hardness - NV	-	156

Tensile strength (yield strength)

Temperature,°C	Time	800	700	650	600	500
Stress MPa	1 000 h	30	70	140	180	270
Stress MPa	10 000 h	10	50	90	130	240
Stress MPa	100 000 h	5	15	50	90	200

Minimum value of elastic limit at high temperatures (deformation in a set time of 1% at a given temperature)

Temperature,°C	Time	800	700	650	600	550
Rp1.0 1.0% plastic strain (fluidity), N/mm2	10 000 ч	10	40	70	100	180
Rp1.0 1.0% plastic strain (fluidity), N/mm2	100 000 ч	5	25	50	80	120

Heat treatment

Tempering at 1050-1 150 °C with rapid water cooling guarantees complete dissolution of carbon. Annealing at 1010 - 1120 °C with rapid cooling with water or cold air ensures maximum processability of the steel. The best corrosion resistance is achieved with annealing at 1070 °C and rapid cooling. Temperature at the beginning of the forging process: 1150 - 1200 °C, at the end of the process - 950 °C. Hot work is followed by annealing. The time to reach homogeneous heating of stainless steels is about 12 times longer than for carbon steels.

Cold work

This steel is both strong and ductile. Cold working includes tensile forming, bending, rotary 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 forming.

Tensile forming

The processing technology implies that the billet is subjected to "braking" during the stretching process. The walls of the billet are thinned, so heat-strengthened steels are used during forming to avoid tearing.

Rotary and deep drawing

During true deep drawing on the press, the billet is not stretched, which does not happen often in practice, the material passes freely between the rolls. Household utensils, for example, are always stretched when drawing. In this case, the alloy for deep drawing, should be characterized by a minimum degree of hardening, that is, be as stable as possible, and the indicator Md30 (N) should be "on minus". For the production of kitchen stainless steel appliances, the so-called sub-analysis of rolled stainless steel is usually used, as in the production of saucepans, by deep drawing. Rotary drawing on a lathe is shaping with turning. Standard objects of use are, for example, buckets or similar symmetrical cone-shaped products which are not normally polished.

Welding

Steel is easy to weld. Generally, no heat treatment is required after welding. However, if there is a risk of intergranular corrosion, an additional annealing at t° 1050-1150°C is carried out. The weld should be chemically and mechanically descaled and then passivated with an etching paste.

Delivery

All AISI 309S products are certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities and mechanical properties of the products. From us you can buy in bulk any semi-finished products for large-scale productions. We also offer optimum conditions for retail buyers. The high level of service and responsiveness of service is the face of our company.

Buy at the best price

The website of Evek GmbH reflects the most up-to-date information on the purchase of stainless steel alloys to date. Experienced managers who are always in touch are ready to provide highly qualified advice on any current issues. We sell semi-finished products of rare and non-ferrous alloys at a competitive price. Products are manufactured on the most modern equipment and meet the requirements of international quality standards. Regular customers are offered a system of discount discounts.