Grade 56Si7
European Standard Steel Grade 1.5026
Corresponding Standard EN 10132-2021
Cold rolled narrow steel strip for heat treatment - Technical delivery conditions
Classification Spring Steel
56Si7 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo
Minimum Value 0.52 1.6 0.6 - - - - - -
Maximum Value 0.6 2 0.9 0.025 0.025 0.4 0.4 0.4 0.1
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.
56Si7 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) ≤740 ≤600 ≥12 HV
≤230
cold rolled(+CR) Agreed Upon at Time of Order Agreed Upon at Time of Order
quenched and tempered(+QT)** 1200~1700 HV
370~520
• 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
Approximate Comparison Table
Germany France European Standard
DIN EN/DIN NF EN/NF EN Numerical Grade
55Si7 55Si7RR 56Si7 1.5026

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