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Grade 51CrV4
Germany W-Nr. 1.8159
Corresponding Standard DIN EN 10089-2003
Hot-rolled steels for quenched and tempered springs Technical delivery conditions
Classification Spring Steel
Properties Strength Elasticity Fatigue Resistance Quench Hardness
51CrV4 Chemical Element Composition Content (%)
Component C Si Mn P S Cr V More
Minimum Value 0.47 - 0.7 - - 0.9 0.1 Cu+10Sn ±0.60
Maximum Value 0.55 0.4 1.1 0.025 0.025 1.2 0.25
51CrV4 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW 		Impact Energy Absorption
KV2
J
Bar, rod Quenching and Tempering (+QT) 1350~1650 ≥1200 ≥6 ≥30 - KU
≥8
Bar, rod Cold Shearing Treatment (+S) - - - - ≤280 -
Bar, rod Softening Annealing (+A) - - - - ≤248 -
Bar, rod Spheroidizing Annealing (+AC) - - - - ≤230 -
New and Old Grade Replacement List
Corresponding Standard Grade
DIN 17221-1988
Grade
Germany W-Nr.
DIN EN 10089-2003
Grade
Germany W-Nr.
1 Approximate Comparison Table Structural Alloy Steel
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 SS14 BS EN/BS
50CrVA A23503 SUP10 SUP10 SPS6 6150 G61500 51CrV4
(50CrV4) 		1.8159 50CV4 50ХФА 2230 735A50
2 Approximate Comparison Table Spring Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS14 BS EN/BS
50CrVA A23503 SUP10 SUP10 SPS6 6150 G61500 51CrV4 51CrV4 1.8159 50CrV4 51CrV4 1.8159 50ХФА 2230 735A50
3 Approximate Comparison Table Structural Alloy Steel
International Organization for Standardization Germany France European Standard United Kingdom
ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade BS EN/BS
(51CrV4) 50CrV4 1.8159 (50CV 4) 51CrV4 1.8159 [735A50]
51CrV4 Corresponding Standards(Same grade name, different standards)
1 EN 10083-3-2006
51CrV4 1.8159
2 ISO 683-14-2004
51CrV4 (9)
3 EN 10089-2002
51CrV4 1.8159
4 EN 10132-4-2002
51CrV4 1.8159
5 EN 10250-3-1999
51CrV4 1.8159
6 DIN 17350-1980
51CrV4 1.2241
7 DIN EN 10089-2003
51CrV4 1.8159
8 ISO 683-2-2016
51CrV4
9 ISO 683-18-2014
51CrV4
10 EN ISO 683-2-2018
51CrV4
11 DIN EN 10132-4-2000(+AC:2002)
51CrV4 1.8159
12 EN 10132-2021
51CrV4 1.8159
13 NF EN 10083-3-2006
51CrV4 1.8159 (50CV4)

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