070M20 - BS 970-1-1983

Grade	070M20
Corresponding Standard	BS 970-1-1983 British Standard Specification for Wrough steels for mechanical and allied engineering purposes Part 1. General inspection and testing procedures and specific requirements for carbon,carbon manganese,alloy and stainless steels
Classification	Carbon Steel

070M20 Chemical Element Composition Content (%)

Component	C	Mn	P	S	Cr	Ni	Mo
Minimum Value	0.16	0.5	-	0.025	-	-	-
Maximum Value	0.24	0.9	0.05	0.05	0.3	0.4	0.15

• For older grades of stainless steel, see Table 2 of standard BS 970-4-1970

070M20 Mechanical Properties

diameter or across flats d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
hot-rolled steel; d ≤ 150	Normalizing	≥430	≥215	≥21	© 126~179
hot-rolled steel; d ≤ 250	Normalizing	≥400	≥200	≥21	© 116~170
Bright bars; 6≤d≤150	Normalizing + Turning or Grinding	≥430	≥215	≥21	© 126~179
Bright bars; 150＜d≤250	Normalizing + Turning or Grinding	≥400	≥200	≥21	© 116~170
Bright bars; 6≤d≤13	Hot Rolled + Cold Drawn or Hot Rolled + Cold Drawn + Grinding	≥560	Re: ≥440 Rp0.2: ≥420	≥10
Bright bar; 13<d≤16	Hot Rolled + Cold Drawn or Hot Rolled + Cold Drawn + Grinding	≥530	Re: ≥420 Rp0.2: ≥390	≥12
Bright bar; 16<d≤40	Hot Rolled + Cold Drawn or Hot Rolled + Cold Drawn + Grinding	≥490	Re: ≥370 Rp0.2: ≥340	≥12
Bright bar; 40<d≤63	Hot Rolled + Cold Drawn or Hot Rolled + Cold Drawn + Grinding	≥480	Re: ≥355 Rp0.2: ≥290	≥13
Bright bar; 63<d≤76	Hot Rolled + Cold Drawn or Hot Rolled + Cold Drawn + Grinding	≥450	Re: ≥325 Rp0.2: ≥280	≥14

• Re-yield strength；Rp0.2-Stress at 0.2% proof plastic elongation (0.2% proof strength).
• Not specified, σs in the table refers to Re
• ft.lb=1.3558J

1 Approximate Comparison Table

China

Taiwan, China

Japan

South Korea

United States

Germany

France

Russia

Sweden

United Kingdom

ISC

CNS

JIS

ASTM/AISI

UNS

DIN EN/DIN

W-Nr.

NF EN/NF

GOST

BS EN/BS

U20202

S20C

SM20C

1020

G10200

C22E
Ck22

1.1151

C22E
XC18

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

070M20 Corresponding Standards(Same grade name, different standards)

1	BS 970-3-1991
	070M20
2	BS 970-1-1983
	070M20

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!