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GOSTs of 07X21G7AN5 steel pipe


Grade analogue W. Nr. Aisi Uns En Order
07X21G7AN5 EP222 Buy from stock, view availability

Technical characteristics

07X21G7AN5 (EP222) refers to chromium-manganese-nickel alloys of austenitic class. It is melted in electric arc furnaces. VDP and ESHP can also be used. Production is regulated by GOST 5949-75 and 5632-72 and technical conditions: 14-1-2455-78; 14-1-952-74; 14-1-1141-74; 14-1-2476-78; 14-1-3041-80. Steel is used in the production of welded and brazed structures operating in the temperature range of 253-400°C (spindles, chains, fasteners, oxygen plant hangers, flanges, thin-walled welded and brazed fragments obtained by cold and hot deformation and threaded joints of high swivelability).

Percentage composition of 07X21G7AN5 (EP222) alloy

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

Physical properties (t° 20°C)

- Thermal conductivity is 0,194 - 10² W/(m - K)

- Specific heat capacity is 430 J/(kg - K).

- Density 7.7 g/cm3

- Modulus of elasticity 20 - 10 - 4 N/mm2

- Hardness - 200 NV MPa -1

- Specific resistance 0.71 Ohmxmm2/m

- Magnetic permeability in the field of 500 E is 0.3 - 0.5 (Tl - m)/A.


Can be automatic welding under flux AH-26, manual and argon-arc welding without additive and with additive. Welding wire Sv-10Х16Н25АМ6, Sv-08Х15Н23В7Г7М2 is used as additive material. The sheet 07Х21Г7А5 with thickness not more than 10 mm is welded by all methods of electric-arc manual welding with satisfactory results. The argon-arc method is recommended for welding sheets less than 6 mm thick and root seams of more than 10 mm. It is preferable to weld this steel with stainless steels such as 07X16H6, 12X18H10T, 12X21H5T and heat-resistant XH60VT and XH77T1O. Welding wire Sv06H15N60M15 is recommended for welding with nickel heat-resistant alloys and Sv-04H19N11MZ with stainless alloys. Welded joints in this case do not require heat treatment.

Application of .

Parts of metallurgical and mining equipment, welded vessels operated in extractive phosphoric, 55% sulfuric acid and acetic acid up to the temperature of 80 °C. Production of structures operating in the temperature range -253 +400 ° C, connections of fittings, in the joints of pipelines, repair of welded equipment that operates in a radioactive environment. As a cladding layer such steel is used in the production of centrifugally cast tubes, for tubular furnace coils and double-layer hot-rolled corrosion-resistant sheets in ethylene, ammonia, carbon disulfide and hydrogen production facilities.


The supplier "Auremo" offers to buy 07Х21Г7А5 (ЭП222) pipe in bulk or in installments. Large selection of semi-finished products in stock. Conformity to GOST and international quality standards. Always in stock pipe 07X21G7AN5 (EP222), the price is optimal from the supplier. We look forward to your orders. Wholesale customers price - favorable.

Buy a bargain price.

The company "Auremo" specializes in the sale of stainless steel and heat-resistant alloys. We offer products on favorable terms. Always in stock a wide range of products of the highest quality. The price depends on the size of the order and the additional terms of delivery. Buy 07Х21Г7А5 (ЭП222) tube today. Discounts are available for bulk purchases.