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BS 970:1955 EN8B Steel: Specifications & Listings

BS 970:1955 EN8B: EN8B is specified in BS 970:1955, Part 2.

Category: Carbon Steel
Grade Details
GradeBS 970:1955 EN8B
Standard BS 970:1955
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
BS 970 (Part 1) 080A37 BS 970 (Part 1):1983 UK No activity yet
BS 970 EN8E BS 970:1955 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 EN8A BS 970:1955 Strong Match
BS 970 EN8E BS 970:1955 Strong Match
BS 970 EN8C BS 970:1955 Strong Match
BS 970 EN8 BS 970:1955 Strong Match
BS 970 EN8K BS 970:1955 Strong Match
BS 970 EN8D BS 970:1955 Strong Match
BS 970 (Part 1) 080A37 BS 970 (Part 1):1983 Strong Match
BS 970 EN8BM BS 970:1955 Strong Match
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Si Mn S P
0.35-0.40 0.05-0.35 0.70-0.90 <=0.060 <=0.060
Mechanical Properties
Tensile Strength ≥541 MPa (35 tons/sq in, converted)
Yield Strength ≥278 MPa (18 tons/sq in, converted)
Elongation ≥20%
Hardness 152-207 HB
Condition NGC 1, Normalised, ruling section 6 in (lowest-strength condition of the standard)

More data from BS 970:1955

From the standard
Condition of material on delivery
A
Bars and billets for forging as rolled or forged unless order states otherwise.
B
Forgings and drop-forgings in the finally heat treated condition unless order states otherwise.
C
Bars for machining in the finally heat treated condition unless order states otherwise.
D
Bright bars per the tables (as altered Feb. 1963).
Source: BS 970:1955, Part 2, En 8B (page 54)
Mechanical properties
ConditionRuling section or size (in)Tensile strength (tons/sq in)Yield stress (tons/sq in)Elongation (%)Izod impact (ft lb)Brinell (HB)Proof stress 0.2% (tons/sq in), when requested
NGC 1, Normalised6351820-152-207-
NGC 1, Hardened and tempered Q2 1/240282210179-229-
NGC 1, Hardened and tempered R7/845322010201-255-
NGC 2, Normalised6351817-152-207-
NGC 2, Hardened and tempered Q2 1/2402817-179-229-
NGC 2, Hardened and tempered R7/8453217-201-255-
GC 1 controlled grain size (McQuaid-Ehn 5-8), Normalised435182020152-207-
GC 1 controlled grain size (McQuaid-Ehn 5-8), Normalised635182015152-207-
GC 1 controlled grain size (McQuaid-Ehn 5-8), Hardened and tempered Q2 1/240282225179-229-
GC 1 controlled grain size (McQuaid-Ehn 5-8), Hardened and tempered R1/245322040201-255-
GC 1 controlled grain size (McQuaid-Ehn 5-8), Hardened and tempered R7/845322025201-255-
GC 2, Normalised6351817dagger (10 where carbon not over 0.40)152-207-
GC 2, Hardened and tempered Q1 1/840281725179-229-
GC 2, Hardened and tempered Q2 1/240281715179-229-
GC 2, Hardened and tempered R7/845321725201-255-
Cold drawn following hot rolling, size (diameter or width across flats) 1 1/4 or less in-42-10-<=241-
Cold drawn following hot rolling, size (diameter or width across flats) Over 1 1/4 to 2 1/2 in-39-10-<=229-
Cold drawn following hot rolling, size (diameter or width across flats) Over 2 1/2 in-37-10-<=229-
Values as printed in BS 970:1955; tensile strength, yield stress and proof stress in tons/sq in, Izod in ft lb. Minimum unless a range is shown.
Source: BS 970:1955, Part 2, En 8B (page 55)
Heat treatment
Normalise
830/860 C
Harden (oil)
830/860 C
Temper
550/660 C
Temperatures in degrees C as printed.
Source: BS 970:1955, Part 2, En 8B (page 54)
Status in the 1955 edition
Status
Deleted by Amendment 9
Reason
Amendment 9 (Feb 1972): carbon and carbon-manganese steels moved to BS 970 Part 1:1972
BS 970:1955 was amended up to Amendment 10 (June 1972); steels were moved to the revised Parts 1 to 5 and deleted from this edition.
Source: BS 970:1955, Amendment slips 6 to 10

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