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Grade 080M50
Corresponding Standard BS 970-3-1991
Specification for wrought steel for machanical and allied engineering purposes part 3:bright bars for general engineering purposes
Classification Carbon Steel
080M50 Chemical Element Composition Content (%)
Component C Si Mn P S Cr * Ni * Mo *
Minimum Value 0.45 0.1 0.6 - - - - -
Maximum Value 0.55 0.4 1 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
080M50 Mechanical Properties
condition Mark
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW 		Impact Energy Absorption
KV2
J
6≤d≤150 Normalizing + Turning or Grinding ≥620 ≥310 ≥14 179~229 -
150＜d≤250 Normalizing + Turning or Grinding ≥570 ≥295 ≥14 163~217 -
6≤d≤13 Hot Rolling + Cold Drawing or Hot Rolling + Cold Drawing + Grinding ≥740 ≥590 ≥7 -
13＜d≤16 Hot Rolling + Cold Drawing or Hot Rolling + Cold Drawing + Grinding ≥730 ≥585 ≥8 -
16＜d≤40 Hot Rolling + Cold Drawing or Hot Rolling + Cold Drawing + Grinding ≥690 ≥555 ≥8 -
40＜d≤63 Hot Rolling + Cold Drawing or Hot Rolling + Cold Drawing + Grinding ≥680 ≥540 ≥9 -
63＜d≤76 Hot Rolling + Cold Drawing or Hot Rolling + Cold Drawing + Grinding ≥650 ≥510 ≥10 -
6≤d≤150 080M50Q Quenching + Turning or Grinding 625~775 ≥390 ≥15 179~229 -
6≤d≤63 080M50R Quenching + Turning or Grinding 700~850 ≥430 ≥14 201~255 -
6≤d≤29 080M50S Quenching + Turning or Grinding 775~925 ≥490 ≥14 223~277 -
6≤d≤13 080M50T Quenching + Turning or Grinding② 850~1000 ≥570 ≥12 248~302 -
13≤d≤150 080M50Q Quenching + Tempering + Cold Drawing or Quenching + Tempering + Cold Drawing + Grinding 625~775 ≥430 ≥11 179~229 -
6≤d≤63 080M50R Quenching + Tempering + Cold Drawing or Quenching + Tempering + Cold Drawing + Grinding 700~850 ≥490 ≥10 201~255 -
6≤d≤29 080M50S Quenching + Tempering + Cold Drawing or Quenching + Tempering + Cold Drawing + Grinding 775~925 ≥540 ≥10 223~277 -
6≤d≤13 080M50T Quenching and tempering + cold drawing or quenching and tempering + cold drawing + grinding② 850~1000 ≥595 ≥9 248~302 -
Rod Turning, Grinding or Cold Drawing and Softening - - - ≤187 -
1 Approximate Comparison Table High-Quality Carbon Structural Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST SS BS EN/BS
50 U20502 S50C S50C SM50C 1050 G10500 C50E4 C50E
Ck53 		1.1210 C50E 50 1674 C50E
080M50
2 Approximate Comparison Table High-Quality Carbon Structural Steel
China Japan United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
50 S50C 1049
1050 		C50
C50E4 		C50
Ck50 		XC48H1 C50 1.0540 50 1674 070M50
080M50
3 Approximate Comparison Table High-Quality Carbon Structural Steel
Japan United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
JIS ASTM ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
S50C 1050 C50E4 Ck50 XC50 C50E 1.1206 50 1674 080M50
CS50
080M50 Corresponding Standards(Same grade name, different standards)
1 BS 970-3-1991
080M50
2 BS 970-1-1983
080M50

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