07KH21G7AN5 - эп222 sheet, round, wire

International Equivalent

Mark	Analogue	W. Nr.	Aisi Uns	En	Order
07Х21Г7АН5	EP222				Delivery from the stock, in stock

Production and use

Steel brand 07KH21G7AN5 (ЭП222) is a chromium-manganese-Nickel austenitic alloy. Is smelted in electric arc furnaces. Also use ESR and var. Production is regulated by the following GOST: 5949−75 and 5632−72, as well as the 14−1-1141−74; 14−1-952−74; 14−1-2476−78; 14−1-2455−78; 14−1-3041−80. From this steel made welded, not welded, brazed designs, which work at t º from -253 to 400 °C (chains, spindles, suspension in oxygen installations, flanges, fasteners, brazed and welded thin-walled parts obtained by hot and cold deformation, the threaded connection of high sinivuori).

Percentage composition

C	Cr	Si	Mn	N	Ni	P	S	Fei
≤0,07	19,5−21	≤0,7.	6−7,5	0,15−0,25	5−6	≤0,03	≤0,02	Basis

Mechanical properties (normalized) at 20 °C

TU	Products	σв, N/mm2	σ0,2, N/mm2	δ5, %	ψ, %	KCU, j/cm2
GOST 5949−75	Bars	700	370	40	50	130
14−1-952−74 (W)	Bars	670	340	40	50	130
14−1-1141−74	Bars	700	370	40	50	130
14−1-2455−78	The leaves are thick	700	400	25	-	-
14−1-2476−78 (W, VD)	The leaves are thin	750	400	25	-	-
14−1-3041−80	Calibrated hexagons	670	340	40	50	-

Mechanical properties at cryogenic and high t º (sheet thickness 12 mm, quenching in water from 1050 °C)

t°	σ_0,2	σ_In	ψ	δ₅	KCU,
C °C	N/mm2	N/mm2	%	%	J/cm2
-253	1240	1530	10	12	120
-70	635	880	54	52	150
20	420	760	60	60	300
100	300	700	50	73	330
200	300	680	73	50	330
300	250	650	75	50	330
400	240	600	73	50	330
500	220	530	72	47	300
600	180	450	63	45	300

σ_in the Limit of short-term strength, [MPa]

δ₅, the elongation at break, [ % ]

ψ is the Relative narrowing [ % ]

Mechanical properties at high t º (sheet thickness 12 mm, quenching in water from 1050 °C)

t°	σ_0,2	σ_In	ψ	δ₅	KCU,
C °C	N/mm2	N/mm2	%	%	J/cm2
800	150	230	60	45	250
900	100	150	73	58	210
1000	15	50	73	72	180
1050	15	40	73	74	155
1100	-	30	72	75	150
1150	-	10	70	55	125
1200	-	10	62	50	125

σ_in the Limit of short-term strength, [MPa]

δ₅, the elongation at break, [ % ]

ψ is the Relative narrowing [ % ]

Mechanical properties dependent on the degree of cold plastic deformation at t=20 °C (sheet thickness of 3 mm, the process of quenching in water before deformation with 1050 °C)

The degree of compression, %	σ0,2, N/mm2	σв, N/mm2	δ5, %	The degree of compression, %	σ0,2, N/mm2	σв, N/mm2	δ5, %
0	463	766	59,1	40	1180	1250	12,1
10	675	830	42,2	60	1299	1365	6,9
20	1109	1104	19,8	-	-	-	-

Mechanical properties of cold-worked condition (the sheet size of 2 mm, the degree of compression of 20%)

tисп, °C	σ0,2, N/mm2	σв, N/mm2	δ5, %
20	990	1050	26
-196	1500	1860	47
-253	1760	2000	9

Physical characteristics at 20°C

Density: 7.7 g/cm3; specific electrical resistivity of 0.71 Ohm • mm2/m; thermal conductivity = 19.4 W/(m · K); specific heat 0,430 · 103, j/(kg · K).The normal elasticity modulus

tисп, °C	E · 10−4 N/mm2	tисп, °C	E · 10−4 N/mm2	tисп, °C	E · 10−4 N/mm2
-253	22,3	20	20,2	700	15,2
-196	21,1	400	17,8	-	-

Temperature coefficient of linear expansion

11.5 11.5

t, °C	-253−20	-196−20	-50−20	20−100	20−200	20−300	20−400	20−500	20−600	20−700
α · 106, K-1	9.3	15.2	15.7	16.0	16.8	17.3	18.0	18.4	18.5

Corrosion resistance

In the tempered condition, this steel resists intergranular corrosion according to the methods AM and AMU, GOST 6032−89. It is resistant to industrial and marine atmosphere and in steam condensate.

Technological parameters

Steel available hot and cold stamping, forging. Hot deformation is carried out at 1150−900°C. Processing pressure in a cold condition is in several stages. During cooling from +20°C to -253°C, the steel retains the stability of the structure.

Welding

This steel is well welded by the TIG method (with or without additive), automatic under flux an-26, manual electric. For filler material suitable wire SV-10Х16Н25АМ6 and SV-08Х15Н23В7Г7М2. Especially good cooks with stainless brands such as 07KH16N6, 12H21N5T, 12KH18N10T and high-temperature alloys (KHN60VT, ХН77Т1О). For welding heat-resistant Nickel alloys welding wire is recommended Св06Х15Н60М15, and with stainless steels — SV-04Х19Н11МЗ. Thus welded joints do not require heat treatment.

Mechanical properties of welded joints (without heat treatment after welding)

Welding, the thickness of the metal	tисп, °C	σв, N/mm2	KCU, j/cm2	The bend angle, grad
TIG welding with tungsten electrodes doped wire SV-10Х16Н25АМ6 Sheets 5 mm	300, 20, -196, -253	510, 700, 1410, 1510	240, 230, 130, 130
TIG welding with tungsten electrodes without additives Sheet 2 mm	300, 20, -196, -253	650, 860, 1530, 1680	-, 110, 100, 90	-, 180, 180, 46

Note to table: steel tech when soldering. If you compare it to 12KH18N10T, it has much less tendency to hot cracking in the stressed state when brazing copper-silver solders, and the solders based on tin, copper, zinc.

Supply

Supply certified products brand 07KH21G7AN5. In the technical documentation included data on chemical composition, limiting the percentage of impurities; mechanical qualities of the products. We can buy any wholesale products for large-scale production. We also offer optimal conditions for retail customers. A high level of service and speed of service are the face of our company.

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