Steel 17H18N9 (2Х18Н9)

Designation

Name	The value
Designation GOST Cyrillic	17Х18Н9
Designation GOST Latin	17X18H9
Transliteration	17H18N9
By chemical elements	17Cr18Н9

Name	The value
Designation GOST Cyrillic	2Х18Н9
Designation GOST Latin	2X18H9
Transliteration	2H18N9
By chemical elements	2Cr18Н9

Description

17H18N9 steel is used: for the manufacture of various parts and structures of sheet and strip, welded by spot welding, pipes and parts thereof; of various parts of the aviation industry; products subjected to heat treatment (annealing); springs and spring parts from wire.

Note

Steel corrosion resistant austenitic class.
Steel higher strength than steel 12KH18N9 brand.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Test methods. Packing. Marking	В09	GOST 11878-66
Wire, steel, alloy	В73	GOST 18143-72, TU 14-4-130-74, TU 14-4-866-77
Sheets and strips	В33	GOST 4405-75, GOST 5582-75, GOST 7350-77, TU 108-930-80, TU 14-105-451-86, TU 14-1-1206-74, TU 14-1-2186-77
Tape	В34	GOST 4986-79, OST 5.9093-72, TU 14-1-4606-89
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 18907-73, TU 14-1-2972-80, TU 14-1-3192-81, TU 14-1-377-72, TU 14-1-3957-85, TU 14-1-4821-90, TU 14-11-245-88, TU 14-1-1271-75
Steel pipes and fittings to them	В62	GOST 9940-81, GOST 9941-81, TU 14-3-1654-89
Blanks. Of the workpiece. Slabs	В21	OST 1 90176-75
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-565-84

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
TU 108-930-80	0.13-0.21	≤0.02	≤0.035	≤2	17-19	≤0.8	8-10	Rest	≤0.5	≤0.2	≤1	≤0.5	≤0.2
TU 14-1-4606-89	0.13-0.21	≤0.02	≤0.035	≤2	17-19	≤0.8	8-10	Rest	≤0.4	≤0.2	≤0.5	≤0.5	≤0.2

Fe is the basis.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	d	y, %
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79 on delivery
0.2-2	-	≥1130	-	≥3	-	-
Rolled steel. Quenching from 1100 °C
-	≥380	≥830	≥45	-	-	≥51
Rolled steel. Indicate the degree of plastic deformation in %
-	≥500	≥830	≥67	-	-	-
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79 on delivery
0.2	-	≥1130	-	≥2	-	-
Rolled steel. Quenching from 1100 °C
-	≥350	≥560	≥33	-	-	≥55
Rolled steel. Indicate the degree of plastic deformation in %
-	≥750	≥950	≥45	-	-	-
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79 on delivery
0.2-2	-	≥980	-	≥5	-	-
Rolled steel. Quenching from 1100 °C
-	≥210	≥410	≥33	-	-	≥52
Rolled steel. Indicate the degree of plastic deformation in %
-	≥900	≥1050	≥38	-	-	-
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79 on delivery
0.2	-	≥980	-	≥3	-	-
Rolled steel. Quenching from 1100 °C
-	≥190	≥255	≥34	-	-	≥64
Rolled steel. Indicate the degree of plastic deformation in %
-	≥1030	≥1150	≥25	-	-	-
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79 on delivery
0.2-2	-	≥780	-	≥15	-	-
Rolled steel. Indicate the degree of plastic deformation in %
-	≥1140	≥1230	≥21	-	-	-
Rolled steel. Quenching from 1100 °C
-	-	≥150	≥45	-	-	≥81
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79 on delivery
0.2	-	≥780	-	≥8	-	-
Rolled steel. Indicate the degree of plastic deformation in %
-	≥1220	≥1300	≥18	-	-	-
Rolled steel. Quenching from 1100 °C
-	-	≥47	≥53	-	-	≥86
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79. Quenching in water or air from 1050-1080 °C (samples)
0.2-2	-	≥570	-	≥34	-	-
Rolled steel. Indicate the degree of plastic deformation in %
-	≥1280	≥1350	≥17	-	-	-
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79. Quenching in water or air from 1050-1080 °C (samples)
0.2	-	≥570	-	≥17	-	-
Rolled steel. Indicate the degree of plastic deformation in %
-	≥1350	≥1400	≥12	-	-	-
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Without heat treatment
≤3.9	-	980-1230	≥13	-	-	-
≤3.9	-	740-980	≥18	-	-	-
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Quenching in water or air from 1050-1080 °C
-	≥185	≥590	≥35	-	-	-
Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water from 1080-1120 °C
-	≥265	≥590	≥35	-	-	-
The wire is heat-treated in the delivery condition according to GOST 18143-72 (elongation, % at rated sample length of 100 mm is specified for the wire of the 1st class in brackets are for 2nd class)
0.2-1	-	590-880	-	-	≥25 (≥20)	-
1.1-6	-	510-830	-	-	≥25 (≥20)	-
Cold drawn wire in the delivery state according to GOST 18143-72
0.2-3	-	1130-1470	-	-	-	-
3.4-6	-	1080-1420	-	-	-	-
Bars of polished, processed on a given strength (TS) according to GOST 18907-73
1-30	-	590-880	-	-	≥20	-
Rolled full hard rolled delivery condition without heat treatment (sample)
≤5	-	≥930	-	-	-	-
5	-	≥880	-	-	-	-
Bars hot rolled and forged according to GOST 5949-75. Quenching in air, oil or water from 1050-1100 °C
	≥215	≥570	≥40	-	-	≥55
Tubes in the delivery condition, without heat treatment (specified wall thickness of pipe)
3.5-32	-	≥568	≥40	-	-	-
0.2-22	-	≥568	≥35	-	-	-
Forming at OST 1 90176-75. Quenching in air, oil or water from 1050-1100 °C
	≥216	≥589	≥40	-	-	≥55

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
d₄	Elongation after rupture
d	Elongation after rupture
y	The relative narrowing

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
0	199	7850	18	720	-	-
20	199	7900	18	720	-	-
700	147	-	26	1115	189	-
100	-	-	19	735	16	504
200	-	-	20	855	17	-
300	-	-	21	925	175	504
400	-	-	22	975	179	-
500	-	-	24	1031	185	-
600	-	-	25	1080	186	-
800	-	-	27	1150	191	-
900	-	-	28	1185	193	-
1000	-	-	-	-	193	-
1200	-	-	-	-	195	-

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity
a	The coefficient of linear expansion
С	Specific heat

Technological properties

Name	The value
The temperature of forging	Start - 1200 °C, the end - 850 °C. the cross Sections up to 350 mm cooled in air.