Steel Е55 (NEPRA)

Designation

Name	The value
Designation GOST Cyrillic	Е55
Designation GOST Latin	E55
Transliteration	E55
By chemical elements	Se55

Name	The value
Designation GOST Cyrillic	НИПРА
Designation GOST Latin	HIPPA
Transliteration	NIPRA
By chemical elements	НИPB

Description

Е55 steel is used: for the production of hot-rolled and forged bars and rods, designed for the manufacture of parts transport and tractor and agricultural machinery manufactured by hot forming, the subsequent mechanical machining and hardening with heating HDTV.

Note

Discapacitadas steel machining.

Standards

Name	Code	Standards
Bars and shapes	В32	EAST 62-144-63, TU ЧМЗ-64-67, TU 14-1-1314-75

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Al	Ti	Se
EAST 62-144-63	0.52-0.6	≤0.04	≤0.04	0.2-0.35	≤0.15	0.1-0.3	≤0.15	Rest	0.06-0.16	0.06	-
TU ЧМЗ-64-67	0.52-0.6	≤0.04	≤0.04	0.2-0.35	≤0.15	0.1-0.3	≤0.15	Rest	0.04-0.1	0.04	0.04
TU 14-1-1314-75	0.52-0.6	≤0.04	≤0.04	0.1-0.35	≤0.15	0.1-0.3	≤0.15	Rest	0.04-0.1	-	0.04

Fe is the basis.
According to the UTU 62-144-63 titanium is introduced at the rate of 0.60% without taking into account the burnout. With the consent of the parties, steel is melted with additional micro-alloying with nitrogen (N) or rare, or rare-earth metals. Method of microalloying and content of elements with NIIM.
According to TU ChMZ-64-67 titanium (Ti) is introduced at the rate of 0.040% without taking into account the fumes. The content of selenium (Se) is calculated. The sum of Mn + Cr + Ni (Manganese + Chrome + Nickel) in steelmaking is not higher than 0.55%. In some cases, with the consent of the parties, steel can be smelted with the replacement of selenium (Se) with rare-earth metals. The technology of microalloying is coordinated with NIIM (Chelyabinsk).
According to TU 14-1-1314-75 titanium (Ti) is introduced at the rate of 0.040% without taking into account the burnout. The content of selenium (Se) is calculated. The sum of Mn + Cr + Ni (Manganese + Chrome + Nickel) in steelmaking is not higher than 0.55%.

Technological properties

Name	The value
Macrostructure and pollution	Metal on the other CMP-64-67 comes with the normalized grain size of austenite, the score of which should not exceed 6 when tested according to GOST 5639.
Particularities of production of goods	Rods, strips and rods for INFORMATION 62-144-63 the CMP-64-67 are supplied depending on the order in vysokoopasnye or thermally unprocessed state.
Sediment	Steel on the other CMP-64-67 and its surface is 62-144-63 ispytyvaet on sediment in the hot state in accordance with GOST 8817.
Hardenability	On the other CMP-64-67, the hardenability according to GOST 5657. The hardenability of steel at HRc=40 must not exceed 4.0 mm. the results of the hardenability optional but must be specified in the certificates.