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BS 970 (Part 1):1983 805A17 Steel: Specifications & Listings

BS 970 (Part 1):1983 805A17: 805A17 is a case hardening alloy steel grade specified in BS 970 Part 1:1983 (Table 11, category 2). Section three of the standard advises that category 1 steels be used for new designs and established designs whenever possible.

Category: Alloy Steel
Grade Details
GradeBS 970 (Part 1):1983 805A17
Standard BS 970 (Part 1):1983
ApplicationsCase hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
SAE J404 8617 SAE J404:2000 USA No activity yet
BS 970 (Part 1) 805A17 BS 970 (Part 1):1991 UK No activity yet
IS 11169 (Part 1) 17Ni2Cr2Mo2 IS 11169 (Part 1):2022 India No activity yet
AISI 8615 AISI USA 2 listings, 0 RFQs →
AISI 8620 AISI USA 2 listings, 0 RFQs →
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 1) 805A17 BS 970 (Part 1):1991 Strong Match
AISI 8617 AISI Strong Match
SAE J404 8617 SAE J404:2009 Strong Match
SAE J404 8617 SAE J404:2000 Strong Match
BS 970 (Part 1) 805A20 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 805A20 BS 970 (Part 1):1991 Strong Match
IS 11169 (Part 1) 17Ni2Cr2Mo2 IS 11169 (Part 1):2022 Strong Match
BS 970 (Part 1) 805A22 BS 970 (Part 1):1983 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 Mn Cr Mo Ni P S
0.15-0.20 0.70-0.90 0.40-0.60 0.15-0.25 0.40-0.70 <=0.035 <=0.040

More data from BS 970 (Part 1):1983

From the standard
Other composition limits
Phosphorus and sulphur
P 0.035 max, S 0.040 max, alloy steels (clause 1.7.2.1)
Residual elements: see clause 1.7.3.
Source: BS 970 (Part 1):1983, clause 1.7.2.1
Mechanical properties, test bar
Test bar diameter (mm)Rm min (N/mm2)A min (%)Izod min (ft lbf)KCV min (J)
19770122022
Values as printed in Table 11 for the test bar diameter shown. 1 N/mm2 = 1 MPa.
Source: BS 970 (Part 1):1983, Table 11
Comparison with earlier editions
BS 970:1970/72 designation
805A17
BS 970:1955 En No.
None
Appendix D note 47: where a comparison is made the steels are not necessarily equivalent. 'Not listed' means the earlier edition has no entry under this designation.
Source: BS 970 (Part 1):1983, Appendix D

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