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Grade 20
Corresponding Standard GOST 1050-1988
SIZED BARS MADE OF HIGH-QUALITY STRUCTURAL CARBON STEEL WITH A SPECIAL SURFACE FINISH
Classification Carbon Steel
Properties Weldability Carburizing Ability
20 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu As
Minimum Value 0.17 0.17 0.35 - - - - - -
Maximum Value 0.24 0.37 0.65 0.035 0.04 0.25 0.3 0.3 0.08
① Identification numbers for steels (depending on degree of deoxidation) shall be used: kn is for rimmed steel; nc is for semi-killed steel; and identification numbers without letters are for killed steels.
②The nitrogen fraction of total mass in basic oxygen steel shall not exceed 0.006 % for light-gage rolled products and strips and 0.008 % for other types of rolled products.
20 Mechanical Properties
product Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Specified Plastic Yield Strength
Rp0.2
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
%
Rolled product ≥410 ≥245 ≥25 ≥55
Rolled product Hard-worked ≥490 ≥7 ≥40
Rolled product Annealed or high-temperature tempered ≥390 ≥21 ≥50
1 Approximate Comparison Table
China Taiwan, China Japan South Korea United States Germany France Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS DIN EN/DIN W-Nr. NF EN/NF GOST SS BS EN/BS
20 U20202 S20C S20C SM20C 1020 G10200 C22E
Ck22 		1.1151 C22E
XC18 		20 1435 C22E
070M20
2 Approximate Comparison Table
China Japan United States International Organization for Standardization Germany European Standard Russia Sweden United Kingdom
GB JIS SAE ISO DIN EN/DIN W-Nr. EN Numerical Grade GOST SS BS EN/BS
20 S20C
S22C 		1020 C25 C22 1.0402 C22 1.0402 20 1450 070M20
3 Approximate Comparison Table
Japan United States Germany France European Standard Russia United Kingdom
JIS ASTM DIN EN/DIN NF EN/NF EN Numerical Grade GOST BS EN/BS
S20C 1020 Ck22 XC18 C22E 1.1151 20 070M20
CS22
4 Approximate Comparison Table
China Japan United States France Russia United Kingdom
GB JIS ASTM/AISI NF EN/NF GOST BS EN/BS
20 S20C 1020 C20
XC18 		20 040A20
050A20
060A20
20 Corresponding Standards(Same grade name, different standards)
1 GB /T 699-1999
20 U20202 20#
2 ISO 4955-2005
(20) X8NiCrAlTi32-21
3 GB /T 699-2015
20 U20202 20#
4 GOST 1050-1988
20
5 ISO 683-13-1986
20
6 GB /T 17107-1997
20
7 GB 6479-2013
20 U20202
8 GB /T 8163-2018
20
9 ISO 4955-2016
(20) X8NiCrAlTi32-21 4876-088-00-I
10 GB /T 3078-2019
20 20#
11 GB /T 710-2008
20 U20202 20#
12 GB /T 711-2017
20 20#
13 HB /Z 136-2000
20
14 NB /T 47008-2017
20
15 GB /T 13237-2013
20
16 JB /T 6908-2020
20 U20202
17 GB 3522-1983
20

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