Grade 15S10
Germany W-Nr. 1.0710
Corresponding Standard DIN 1651-1988
Free-cutting steels technical delivery conditions
Classification Carbon Steel
Properties Machinability Carburizing Ability
15S10 Chemical Element Composition Content (%)
Component C Si Mn P S
Minimum Value 0.12 0.1 0.7 - 0.08
Maximum Value 0.18 0.3 1.1 0.06 0.13
①Elements not listed in the table (except for finishing the cast) shall not be intentionally add to the steel. Such introduction may only be agreed upon with the customer if it can be demonstrated to improve machinability.
15S10 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Hardness
HBW
Bar, semi-finished product, wire; t ≤ 10 Hot Work (U) or Hot Work and Peeling (U+SH) 420~600 ≤176
Bar, semi-finished products, wire rod; 10 < t ≤ 16 Hot Work (U) or Hot Work and Peeling (U+SH) 410~600 ≤159
Bar, semi-finished products, wire rod; 16 < t ≤ 40 Hot Work (U) or Hot Work and Peeling (U+SH) 400~560 ≤166
Bar, semi-finished products, wire rod; 40 < t ≤ 63 Hot Work (U) or Hot Work and Peeling (U+SH) 380~550 ≤162
Bar, semi-finished products, wire rod; 63 < t ≤ 100 Hot Work (U) or Hot Work and Peeling (U+SH) 380~550 ≤162
Bar, semi-finished product, wire; t ≤ 10 Cold Drawing (K) 520~820 ≥420 ≥6
Bars, semi-finished products, wire rods; 10<d≤16 Cold Drawing (K) 500~780 ≥400 ≥7
Bars, semi-finished products, wire rods; 16<d≤40 Cold Drawing (K) 450~720 ≥360 ≥8
Bars, semifinished products, wire; 40<d≤63 Cold Drawing (K) 400~650 ≥300 ≥9
Bars, semi-finished products, wire rod; 63<d≤100 Cold Drawing (K) 380~620 ≥250 ≥10
Bar, Semi-finished, Wire; d≤100 Cold Drawn and Stress Relief (K+S) ≤580
①A structure is usually defined first, followed by heat treatment (e.g., K+V). When the sequence is reversed, especially for steels such as 45S20, 45SPb20, and 60SPb20, the values to be complied with must be agreed upon.
②The minimum transverse elongation in a tensile test applies to steels 9Mn28, 9SMnPb28, 15S10, 10S20, and 10SPb20 in structural or heat-treated states U+SH and K+S.
③Round bars exceeding 50mm in diameter are generally supplied in a peeled condition rather than cold-drawn.
Approximate Comparison Table Free-Cutting Structural Steel
Germany European Standard
DIN EN/DIN EN Numerical Grade
15S10 15S10 1.0710
15S10 Corresponding Standards(Same grade name, different standards)

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