EN 10084:2008 C10R Steel: Specifications & Listings
EN 10084:2008 C10R: A low carbon non alloy special steel for case hardening to EN 10084:2008 (steel number 1.1207), with controlled sulphur of 0.020 to 0.040% for better machinability. Supplied as semi-finished products, bars, rod, flat products and forgings (Table 1); intended for carburizing or carbonitriding and subsequent hardening, giving a hard surface layer and a tough core (clause 3.1).
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Mn
P
S
Si
0.07-0.13
0.30-0.60
<=0.035
0.020-0.040
<=0.40
Mechanical Properties
Condition
Soft annealed
Hardness
Soft annealed: 131 HB max
More data from EN 10084:2008
From the standard
Other composition limitsTable 3 and its notes
Designation as printed
C10R
Steel number
1.1207
Classification
Non alloy special steel (clause 4.1)
Pair grade
C10E has the same limits except sulphur, max. 0.035
Improved machinability
Steels with sulphur up to about 0.10% or lead may be supplied on request; the upper manganese limit may then be 0.15 higher (Table 3, note c)
Elements not quoted in Table 3 are not intentionally added without the purchaser's agreement, other than for finishing the heat. With hardenability requirements, slight deviations from the cast analysis limits are permitted except for phosphorus and sulphur: carbon within 0.01%, other elements within Table 4.
Source: EN 10084:2008 (DIN EN 10084:2008-06), Table 3 and its notes
Hardness by delivery conditionTable 7
Shearability
Shearable in the untreated condition under suitable conditions (clause 7.2.2.3)
Soft annealed (+A), max
131 HB
Normalized (+N)
85 to 140 HB
Brinell hardness (HBW) for the conditions given in the standard; the values also apply to the grades with hardenability requirements (+H, +HH, +HL).
Source: EN 10084:2008 (DIN EN 10084:2008-06), Table 7
Heat treatmentTable 8
Carburizing
880 to 980 deg C
Core hardening
880 to 920 deg C
Case hardening
780 to 820 deg C
Tempering
150 to 200 deg C
Temperatures for carburizing, core hardening, case hardening and tempering are for guidance; the temperatures chosen should give the properties required. Austenitizing time for the end quench test as a guide 30 to 35 minutes, tempering at least 1 hour.
Source: EN 10084:2008 (DIN EN 10084:2008-06), Table 8
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