Steel 20Х20Н14С2

Steel 20Cr20N14C2: a classifier of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperatures, physical, mechanical, technological and foundry properties for the grade — Steel 20Cr20N14C2.

General information on steel 20X20H14C2

Delivery type

Sheet 20х20Н14с2, bars, including shaped: GOST 5949−75, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated bar GOST 7417−75, GOST 8559−75, GOST 8560−78. Grinded rod and silver GOST 14955−77. Sheet thin GOST 5582−75, GOST 19903−74, GOST 19904−74. GOST 4405−75, GOST 103−76. forging and forged blanks GOST 1133−71, GOST 25054−81.

Application

Furnace conveyors, boxes for carburizing and other parts of thermal furnaces. Heat-resistant steel of austenitic-ferritic class.

Chemical composition of steel 20Х20Н14С2

Chemical element	%
Silicon (Si)	2.0−3.0
Manganese (Mn), not more	1.5
Copper (Cu), not more than	0.30
Nickel (Ni)	12.0−15.0
Sulfur (S), not more than	0.025
Titanium (Ti), not more than	0.2
Carbon ©, not more than	0.20
Phosphorus (P), not more than	0.035
Chrome (Cr)	19.0−22.0

Mechanical properties of steel 20Х20Н14С2

Heat treatment, delivery condition	Section, mm	σ0_.2, MPa	_σB, MPa	_δ5, %	ψ, %
Rods. Hardening at 1000−1150°C. air or water.	60	295	590	35	55
Hot- or cold-rolled sheets. Hardened 1000−1080°C, air or water.	<3,9		590	40

Mechanical properties at elevated temperatures

t test,°C	σ0_{, 2}, MPa	_σB, MPa	_δ5, %	ψ, %
Tempering 1100 °C, water
20	390	630	33	43
700	110	300	36	44
750	110	265	39	49
800	98	225	41	55
900	39	110	49	60
Heating 1150 °C, water
20	343−392	630	53	73
100	110	305	36	34
750	110	265	35	34
800	98	225	42	41
850	69	155	58	47
900	39	110	74	58
950	29	88	75	55

Mechanical properties in the long term strength test

Creep strength, MPa	Creep rate, %/h	t test,°C	Ultimate long-term strength, MPa	Test duration, h	t test, h
9.8	1/10000	875
1.4		1000

Technological properties of steel 20Х20Н14С2

Forging temperature

The beginning 1170, the end 850. Sections up to 350 mm are cooled in the air.

Physical properties of steel 20Х20Н14С2

Test temperature,°C	20	100	200	300	400	500	600	700	800	900
Steel density, pn, ^kg/m3	7800	7760					7550	7510	7470	7420
Thermal conductivity coefficient W/(m — °C)		15	17	18	19	21	23	24	26	28
Electrical resistivity (p, nominal value — m)	946	1000	1051	1095	1130	1100	1194	1218	1242	1242
Test temperature,°C	20−100	20−200	20−300	20−400	20−500	20−600	20−700	20−800	20−900	20−1000
Coefficient of linear expansion (a, 10−6 1/°C)	16.0					18.1	18.3	18.5	18.8	19.0

Steel 20Х20Н14С2