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JIS G4304:2021 SUSXM7 Steel: Specifications & Listings

JIS G4304:2021 SUSXM7: SUSXM7: austenitic stainless steel, hot-rolled plate, sheet and strip. Specified in JIS G 4304:2021.

Category: Stainless Steel
Grade Details
GradeJIS G4304:2021 SUSXM7
Standard JIS G4304:2021
ApplicationsHot-rolled stainless steel plates and strips
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
JIS G4304 SUS304J1 JIS G4304:2021 Japan No activity yet
JIS G4305 SUSXM7 JIS G4305:2012 Japan No activity yet
BS 970 (Part 3) 304S31 BS 970 (Part 3):1991 UK No activity yet
ASTM A959 347 ASTM A959:2011 USA No activity yet
BS 970 (Part 3) 321S31 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 3) 347S31 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 3) 302S31 BS 970 (Part 3):1991 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
JIS G4305 SUSXM7 JIS G4305:2012 Strong Match
BS 970 (Part 3) 304S31 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 304S31 BS 970 (Part 1):1983 Strong Match
ASTM A959 347 ASTM A959:2011 Strong Match
BS 970 (Part 3) 321S31 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 3) 347S31 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 321S31 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 347S31 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 Si Mn P S Ni Cr Cu
<=0.08 <=1.00 <=2.00 <=0.045 <=0.030 8.50-10.50 17.00-19.00 3.00-4.00
Mechanical Properties
Tensile Strength >=450 MPa
Yield Strength >=155 MPa
Elongation >=40%
Hardness <=187 HB
Condition Solution heat treated plate and strip; 0.2 percent proof strength applies only when specified by the purchaser

More data from JIS G4304:2021

From the standard
Mechanical properties, solution heat treated 3 values
0.2 percent proof strength, min
155 MPa
Tensile strength, min
450 MPa
Elongation, min
40 %
0.2 percent proof strength applies only when specified by the purchaser. 1 N/mm2 = 1 MPa.
Source: JIS G 4304:2021, Table 8
Hardness, solution heat treated 3 scales
Brinell hardness HBW, max
187
Rockwell HRBW or HRBS, max
90
Vickers hardness HV, max
200
Any one of the hardness scales applies; if not specified the manufacturer selects. HRBW is used in case of dispute.
Source: JIS G 4304:2021, Table 8
Heat treatment (example, informative) 1 settings
Solution heat treatment
1010 to 1150 deg C, rapid cooling
Annex JA is informative; temperatures are examples.
Source: JIS G 4304:2021, Table JA.1

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