Steel Grade 20. GOST

November 08, 2018

Characteristics for grade 20 ( 20 )

Chemical composition in % for grade 20 ( 20 )

C	Si	Mn	Ni	S	P	Cr	Cu	As
0.17 - 0.24	0.17 - 0.37	0.35 - 0.65	max 0.3	max 0.04	max 0.035	max 0.25	max 0.3	max 0.08

Temperature of critical points for grade 20 ( 20 ).

Ac₁ = 724 , Ac₃(Ac_m) = 845 , Ar₃(Arc_m) = 815 , Ar₁ = 682

Mechanical properties under Т=20^oС for grade 20 ( 20 )

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Sheet heat-treatment, GOST 4041-71	4 - 14		340-490		28
Pipe hot strain, GOST 550-75			431	255	22	50	780
Pipe, GOST 8731-87			412	245	21
Pipe, GOST 10705-80			372	225	22
Rolled stock, GOST 1050-88	to 80		410	245	25	55		Normalizing
Rolled stock cold-worked , GOST 1050-88			490		7	40
Rolled stock annealed , GOST 1050-88			390		21	50
Band annealed , GOST 2284-79			310-540		18
Band cold-worked , GOST 2284-79			490-830

Brinell hardness for 20 ( 20 ) (annealing) , GOST 1050-88	HB 10^-1 = 163 MPa
Brinell hardness for 20 ( 20 ) (cold-drawn, cold-worked) , GOST 1050-88	HB 10^-1 = 207 MPa
Brinell hardness for 20 ( 20 ) , Sheet GOST 4041-71	HB 10^-1 = 127 MPa
Brinell hardness for 20 ( 20 ) , Pipe GOST 550-75	HB 10^-1 = 156 MPa
Brinell hardness for 20 ( 20 ) , Pipe GOST 8731-87	HB 10^-1 = 156 MPa
Brinell hardness for 20 ( 20 ) , Sheet trick GOST 1577-93	HB 10^-1 = 156 MPa

Technological properties for grade 20 ( 20 )

Weldability:	without limitations.
Flakes :	not predisposed
Temper brittleness:	not predisposed

Physical properties for grade 20 ( 20 )

T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹
Grade	MPa	1/Grade	Watt/(m·Grade)	kg/m³	J/(kg·Grade)	Ohm·m
20	2.13		52	7859
100	2.03	11.6	50.6	7834	486	219
200	1.99	12.6	48.6	7803	498	292
300	1.9	13.1	46.2	7770	514	381
400	1.82	13.6	42.8	7736	533	487
500	1.72	14.1	39.1	7699	555	601
600	1.6	14.6	35.8	7659	584	758
700		14.8	32	7617	636	925
800		12.9		7624	703	1094
900				7600	703	1135
1000					695
T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹

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Equivalent steels for grade 20 ( 20 )Warning! Indicated both exact and nearest equivalents.

USA

Germany

Japan

France

England

European

Italy

Belgium

Spain

China

Sweden

Bulgaria

Hungary

Poland

Romania

Czechia

Australia

Switzerland

South Korea

DIN,WNr

JIS

AFNOR

UNI

NBN

UNE

BDS

MSZ

STAS

CSN

SNV

1020

1023

1024

G10200

G10230

H10200

M1020

M1023

1.0402

1.0405

1.1151

C22

C22E

C22R

Ck22

Cm22

Cq22

St35

St45-8

S20C

S20CK

S22C

STB410

STKM12A

STKM12A-S

STKM13B

STKM13B-W

1C22

2C22

AF42

AF42C20

C20

C22

C22E

C25E

XC15

XC18

XC25

050A20

055M15

070M20

070M26

1449-22CS

1449-22HS

1C22

22HS

430

C22

C22E

1.0402

1.1151

1.1152

2C22

C20E2C

C22

C22E

C18

C20

C21

C22

C22E

C22R

C25

C25E

C25-1

C25-2

1C22

C22

C25k

F.112

F.1120

20G

20R

20Z

1450

C22

C22E

A45.47

C22E

K18

OLC20

OLC20X

12022

12024

1020

M1020

Ck22

SM20C

SM20CK

SM22C

Types of delivery of grade 20 ( 20 )

B03 - Metal forming treatment. Forgings

В22 - Graded and shaped rolling

B23 - Sheets and Strips

B24 - Ribbons

В32 - Graded and shaped rolling

B33 - Sheets and Strips

B34 - Ribbons

В62 - Steel pipes and connecting parts to them

В71 - Low-carbon steel wire

В72 - Medium-high and high-carbon steel wire

B76 - Metal nets

Specification :

Mechanical properties :
s_в	- Tensile strength , [MPa]
s_T	- Yield stress, [MPa]
d₅	- Specific elongation at fracture , [ % ]
y	- Reduction of area , [ % ]
KCU	- Impact strength , [ kJ / m²]
HB	- Brinell hardness , [MPa]

Physical properties :
T	- Test temperature , [Grade]
E	- Young modulus , [MPa]
a	- Coefficient of linear expansion (range 20^o - T ) , [1/Grade]
l	- Termal (heat) condition coefficient , [Watt/(m·Grade)]
r	- Density , [kg/m³]
C	- Specific heat ( range 20^o - T ), [J/(kg·Grade)]
R	- Electrical resistance , [Ohm·m]

Weldability :
without limitations	- welding is done without heating and subsequent heat treating
limited weldability	- welding is possible under heating up to 100-120 grade and subsequent heat treating
hard weldability	- obtaining the quality welding needs the additional operations:heating up to 200-300 grade; the heat treating ia annealing

20 ( 20 ) - High quality structural carbon steel: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

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Author:

Ms. Sunny Peng

Phone/WhatsApp:

+8618333120628

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