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JIS G4804 SUM25 vs EN 10087 9SMn28

Related Material — 58.5% match based on chemical composition and mechanical property overlap.

JIS G4804 SUM25 (JIS G 4804:2021) and EN 10087 9SMn28 (EN 10087:1998) are both steel grades. Both fall under the Free Machining Steel category. JIS G4804 SUM25 is typically used for high volume automatic machining, precision parts, while EN 10087 9SMn28 is commonly used for screw machine parts, general automatic turning. JIS G4804 SUM25 is defined under Japanese Industrial Standards (JIS), originating from Japan, while EN 10087 9SMn28 is defined under European Standard (EN), originating from Europe.

As per chemical composition, JIS G4804 SUM25 vs EN 10087 9SMn28 is a 87.7% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 58.5%.

Frequently Compared With JIS G4804 SUM25:
SAE J403 1126 SAE J403 1141 SAE J403 1117 SAE J403 1126 SAE J403 1117 SAE J403 1117 SAE J403 1126 IS 4432 10C8S10 SAE J403 1118 SAE J403 1132 SAE J403 1118 SAE J403 1118
Match Breakdown
CHEMISTRY MATCH
87.7%
MECHANICAL MATCH
0%
OVERALL
58.5%
Specifications
Property JIS G4804 SUM25 EN 10087 9SMn28
Standard JIS G 4804:2021 EN 10087:1998
Category Free Machining Steel Free Machining Steel
C (%) ≤0.15 ≤0.14
Mn (%) 0.90–1.40 0.90–1.30
P (%) 0.07–0.12 ≤0.110
S (%) 0.30–0.40 0.24–0.32
Si (%) Not specified ≤0.05
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4804 SUM25 EN 10087 9SMn28
Tensile Strength 390–510 MPa 380–570 MPa
Hardness ≤163 HB Not specified
Elongation Not specified ≥7%
Typical Applications
JIS G4804 SUM25
High volume automatic machining, precision parts
EN 10087 9SMn28
Screw machine parts, general automatic turning
Key Differences
Can JIS G4804 SUM25 Be Substituted With EN 10087 9SMn28?
JIS G4804 SUM25 and EN 10087 9SMn28 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
JIS G4804 SUM25
Hex Bar → (2 listings)
Across Flats: 25–25 mm (0.98–0.98 in)
Length: 3500–3500 mm (137.8–137.8 in)
EN 10087 9SMn28
Hex Bar → (2 listings)
Across Flats: 25–25 mm (0.98–0.98 in)
Length: 3500–5300 mm (137.8–208.66 in)
On M-EX Right Now
JIS G4804 SUM25
2 active listings and RFQs →
EN 10087 9SMn28
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4804 SUM25 and EN 10087 9SMn28?
EN 10087 9SMn28 specifies Si which is not specified for JIS G4804 SUM25.
Can JIS G4804 SUM25 be substituted with EN 10087 9SMn28?
JIS G4804 SUM25 and EN 10087 9SMn28 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.