Post Stock Login Register

BS 970 (Part 1):1991 403S17 Steel: Specifications & Listings

BS 970 (Part 1):1991 403S17: 403S17 is a ferritic steel specified in BS 970 Part 1:1991 (category 1).

Category: Stainless Steel
Grade Details
GradeBS 970 (Part 1):1991 403S17
Standard BS 970 (Part 1):1991
ApplicationsFerritic and martensitic stainless and heat resisting steel (section five)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
ASTM A959 405 ASTM A959:2011 USA No activity yet
ASTM A959 S40800 ASTM A959:2011 USA No activity yet
ASTM A959 409 ASTM A959:2011 USA No activity yet
ASTM A959 409Cb ASTM A959:2011 USA No activity yet
BS 970 (Part 3) 403S17 BS 970 (Part 3):1991 UK No activity yet
IS 6603 X04Cr12 IS 6603:2024 India No activity yet
ASTM A240/A240M S41008 ASTM A240/A240M:2025 USA No activity yet
JIS G4304 SUS410S JIS G4304:2021 Japan No activity yet
ASTM A276/A276M S40500 ASTM A276/A276M:2017 USA No activity yet
JIS G4304 SUS405 JIS G4304:2021 Japan No activity yet
ASTM A240/A240M S40300 ASTM A240/A240M:2025 USA No activity yet
JIS G4304 SUS429 JIS G4304:2021 Japan No activity yet
JIS G4304 SUS403 JIS G4304:2021 Japan No activity yet
JIS G4304 SUS410 JIS G4304:2021 Japan No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 3) 403S17 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 403S17 BS 970 (Part 1):1983 Strong Match
IS 6603 X04Cr12 IS 6603:2024 Strong Match
ASTM A240/A240M S41008 ASTM A240/A240M:2025 Strong Match
JIS G4304 SUS410S JIS G4304:2021 Strong Match
JIS G4305 SUS410S JIS G4305:2012 Strong Match
ASTM A959 405 ASTM A959:2011 Strong Match
ASTM A276/A276M S40500 ASTM A276/A276M:2017 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 P S Cr Ni
<=0.08 <=1.0 <=1.0 <=0.040 <=0.030 12.0-14.0 <=0.50

More data from BS 970 (Part 1):1991

From the standard
Other composition limits
Category
Category 1 steel (note 7)
Maximum unless a range is stated.
Source: BS 970 (Part 1):1991, Table 10
Mechanical properties by heat treatment condition
ConditionLimiting ruling section (mm)Heat treatment (deg C)Tensile strength Rm (MPa)Yield Re, min (MPa)Elongation, min (%)Impact Izod, min (ft lb)Rp0.2, min (MPa)Hardness HB
-150700-780 (31)420 min.28020-245170 max.
Heat treatment: (31) air cooled or furnace cooled, (32) cooled freely in air, (33) oil or air hardened, (34) tempered, (35) when 0.2 % proof stress is specified a double tempering treatment is recommended: 640 to 680 deg C followed by 590 to 610 deg C. Rp0.2 applies when specifically ordered (note 10). Condition letters P, R, S, T as printed.
Source: BS 970 (Part 1):1991, Table 10
Hardness in the softened condition
Softened condition, max
170 HB
Table 10, softened condition.
Source: BS 970 (Part 1):1991, Table 10

Active BS 970 (Part 1):1991 403S17 Listings on M-EX (For Sale)

+ Create a Listing for this grade

No active BS 970 (Part 1):1991 403S17 listings at this time.

Register for Alerts

Buyer RFQs for BS 970 (Part 1):1991 403S17

+ Post an RFQ for this grade

No open buyer requirements for BS 970 (Part 1):1991 403S17 at this time.

Register for Alerts