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Grade 51CrV4
European Standard Steel Grade 1.8159
Corresponding Standard EN 10132-2021
Cold rolled narrow steel strip for heat treatment - Technical delivery conditions
Classification Spring Steel
51CrV4 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo V
Minimum Value 0.47 - 0.7 - - 0.9 - - - 0.15
Maximum Value 0.55 0.4 1.1 0.025 0.025 1.2 0.4 0.4 0.1 0.25
① Elements not quoted in this table shall not be intentionally added to the steel without the agreement of the purchaser, other than for the purpose of finishing the heat. All reasonable precautions shall be taken to prevent the addition, from scrap or other material used in manufacture, of such elements which affect the hardenability, mechanical properties and application.
51CrV4 Mechanical Properties
Delivery condition* Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
annealed (+A) or annealed and skin passed(+LC) ≤700 ≤550 ≥13 HV
≤220
cold rolled(+CR) Agreed Upon at Time of Order Agreed Upon at Time of Order
quenched and tempered(+QT)** 1200~1800 HV
370~550
• The elongation values in the table are for a gauge length of 80 mm.
• +A=annealed，+LC=annealed and skin passed，+CR=cold rolled，+QT=quenched and tempered
1 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
2 Approximate Comparison Table Structural Alloy 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
50CrVA SUP10 6150 51CrV4 50CrV4 50CrV4
50CV4
51CrV4 		51CrV4 1.8159 50KHGFA 2230 735A50
735A51
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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