中文版
Home Material NF A 35-557-1983
简体 | 繁體
Grade 20MB5
Corresponding Standard NF A 35-557-1983
Classification Alloy Steel
Properties Strength
20MB5 Chemical Element Composition Content (%)
Component C Si Mn P S B
Minimum Value 0.16 0.1 1.1 - - 0.0008
Maximum Value 0.22 0.4 1.4 0.035 0.035 0.005
20MB5 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW 		Impact Energy Absorption
KV2
J
Bar, coil; d = 30 Oil Quenching - - - HRC38 -
Bar, Coil; d=9 Oil Quenching - - - HRC42 -
Bars, coiled bars; d≤16 Quenching and Tempering 820~1020 ≥660 ≥12 - Charpy U Notch
≥90
1 Approximate Comparison Table
China Japan United States International Organization for Standardization France
GB ISC JIS ASTM/AISI UNS ISO NF EN/NF
ML15MnB A71154 SWRCHB620 1518 G15180 CE20BG2
(E2) 		20MB5
2 Approximate Comparison Table structural alloy steel
Germany France European Standard United Kingdom
DIN EN/DIN NF EN/NF EN Numerical Grade BS EN/BS
19MnB4 20MB5 20MnB5 1.5530 170H20
20MB5 Corresponding Standards(Same grade name, different standards)
1 NF A 35-551-1986
20MB5
2 NF A 35-557-1983
20MB5
3 NF A 35-556-1984
20MB5
4 NF EN 10083-3-2006
(20MB5) 20MnB5 1.5530
5 NF A 36-102-1993
(20 MB 5) 20MnB5RR
6 NF A 35-566-1983
20MB5

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