03Х18Н11 - 1.4306 - aisi 304L tube

International Equivalent

Mark	Analogue	W. Nr.	Aisi Uns	En	Order
03Х18Н11		1.4306	~304L	X2CrNi19-11	Delivery from the stock, in stock

Relevance

Mark 03H18N11 relates to austenitic chromium-nickel steel. It is relevant in chemical engineering in the production of welded pipes and tanks in contact with boiling 70% nitric acid, 45−80% HNO ₃ at t ° 80−140 ° C, and for parts resistant to adipic acid, ammonium nitrate, nitrous gases in the environment, at t ° up to 80 ° C. The welds of the steel are resistant to blade corrosion, withstand pressure of up to 5 N / mm². The temperature range of use of welded structures: from -196 ° C to + 300 ° C.

Production

Steel is melted in an open electric arc furnaces, induction furnaces vacuum while using low carbon ferro-alloys. Methods are also used oxygen refining of molten metal and vacuum decarburizing a melt in a ladle. On alloy 03H18N11 following GOSSTANDART provided: 1133−71; 5582−75; 25, 054−81; 5632−72 and TU: 14−1-1160−74; 14−1-1180−74; 14−1-2144−77; 14−1-2450−78; 14−1-3071−80; 14−1-3652−83; 14−1-490−72; 14−4-3071−80.

The percentage of

C	Cr	Si	Mn	Ni	P	S	Fe
≤0,03	17−19	≤0,8	≤2	10.5−12.5	≤0,035	≤0,02	The basis

The mechanical properties at 20 ° t ° C

GOST, TU	products	σ _in N / mm²	_σ 0,2, N / mm²	δ _5%	ψ,%
14−1-1160−74	rods	500	200	40	50
14−1-490−72	sheets, hot-rolled	500	200	45	-
14−1-2144−77	sheets, hot-rolled	500	200	40	-
14−1-3071−80	sheets, hot-rolled	520	200	45	-
14−1-3071−80 ^{* 1}	sheets, hot-rolled	470	176	40	-
GOST 5582−75	sheet metal, cold	500	200	40	-
14−1-1180−74	sheet metal, cold	520	200	45	-
14−1-3386−82	Tapes	600−750	-	thirty	-
14−1-3652−83	Tapes	540−720	-	37	-
14−3-1401−86 ^{* 1}	seamless pipes	460	186	45	-
14−1-3183−81 ^{* 1}	Round billet	451	157	-	-
14−1-2132−77 ^{* 1}	Round billet	490	196	45	-

^{* 1} Steel 02H18N11 brand.

The mechanical properties of the steel grade 03H18N11 at room and elevated t º (sheet size of 8 mm, the process of quenching in water from 1100 ° C)

_es t, ° C	_σ 0,2, N / mm²	σ _in N / mm²	δ _5%	ψ,%	_es t, ° C	_σ 0,2, N / mm²	σ _in N / mm²	δ _5%	ψ,%
20	280	550	55	73	300	260	390	36	70
150	240	440	40	69	400	190	370	35	67
200	260	420	40	73	450	220	370	33	67

The mechanical properties of the steel grade 03H18N11 at high t º (sheet size of 8 mm, the process of quenching in water from 1100 ° C, the sample longitudinal)

_es t, ° C	_σ 0,2, N / mm²	σ _in N / mm²	δ _5%	ψ,%	_es t, ° C	_σ 0,2, N / mm²	σ _in N / mm²	δ _5%	ψ,%
500	1780	280	38	56	900	80	110	38	66
700	120	210	36	63	1000	25	70	42	78
800	100	130	37	64	-	-	-	-	-

Influence t hardening on the mechanical properties of the alloys (sheet of Mechel OAO; data according GIAP, Moscow)

Steel	Si	FROM	σ _{in /} σ 0,2, N / mm²	δ _5%	σ _{in /} σ 0,2, N / mm²	δ _5%	σ _{in /} σ 0,2, N / mm²	δ _5%	σ _{in /} σ 0,2, N / mm²	δ _5%
			1040 ° C		1080 ° C		1050 ° C		1200 ° C
02H18N11	0.2	0,025	553/228	60	553/220	60	540/205	63	520/200	67
03H18N11	0.78	0.03	590/250	56	580/250	58	555/205	60	545/210	63

physical properties

Steel resistant to intergranular corrosion after provoking leave (1 hour at 650 ° t ° C). Tests in accordance with GOST 6032−89 control. The corrosion rate should not exceed 0.5 mm / year in 03H18N11 and 0.4 mm / year in 02H18N11.

Behavior 02H18N11 steel against corrosion

Si	C	Mask loss in g / m²	The depth of corrosion in the weld zone ^{1 *} in micrometers	1075 ° C	1120 ° C	1150 ° C
0.14	0,025	83	23	0.19	0.2	0.18

Welded ^{* 1} samples have been tested in a purge column operating conditions in the production of nitric acid (56−60% HNO _3, t = 130 ° C, 10 to 390 hours).

Technological processing parameters

The heating temperature for rolling ingots 1240−1260 ° C. Temperature range of semi-finished hot deformation of 1100−900 ° C, to remove the work hardening after cold or hot deformation, softening heat treatment is applied. The hardening is carried out in water at t ° 1040−1100 ° C. Machinability, like steel X18H10T. The content in the α-phase plates — no more than 0.5 points.

Welding

Good weldability. For manual arc welding electrodes are used RLA-22 with wire grade Sv-01H18N10. With automatic submerged arc welding or shielding gases used 01X18N10 St-wire (St-01H19N9). Note that according to the conclusion NIICHIMMASH corrosion resistance and strength of welded joints is not lower than that of the base metal. Unlike 08X18NYUT, welded joints of steel grade and 03H18N11 02H18N11 in oxidizing environments resistant to blade corrosion. Welds of the same steel can be annealed to relieve stress, it does not have to fear the appearance of their tendency to intergranular corrosion.

Supply

All submitted 03H18N11 rental brand certified. The technical documentation includes data on the chemical composition, limiting the percentage of impurities; mechanical properties of products. We can buy in bulk, any semi-finished products for large-scale productions. We also offer optimal conditions for retail customers. High level of service and efficiency of service are the face of our company.

Buy at the best price

In stock company «Electrovek-steel» is represented by a diverse range of stainless steel alloys. We supply certified products of domestic and foreign manufacturers. Our staff members are always happy to provide expert assistance in the selection of metal-roll. We employ some of the most experienced management consultants. Strict compliance with the rules of production, excellent product quality and minimal lead times are the face of our company. For regular customers introduced discount prices.