UNI 7845 C45 vs SS 14 21 72 2172

Strong Match — 98.5% match based on chemical composition and mechanical property overlap.

UNI 7845 C45 (UNI 7845:1978) and SS 14 21 72 2172 are both steel grades. Both fall under the Carbon Steel category. UNI 7845 C45 is typically used for shafts,axles,gears,studs,bolts,spindles,rollers,general engineering components, while SS 14 21 72 2172 is commonly used for shafts,axles,gears,studs,bolts,general engineering components,machine parts. UNI 7845 C45 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy, while SS 14 21 72 2172 is defined under Swedish Standards (SS), originating from Sweden.

As per chemical composition, UNI 7845 C45 vs SS 14 21 72 2172 is a 97.8% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 98.5%.

Frequently Compared With UNI 7845 C45:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
97.8%
MECHANICAL MATCH
100%
OVERALL
98.5%
Specifications
Property UNI 7845 C45 SS 14 21 72 2172
Standard UNI 7845:1978 SS 14 21 72
Category Carbon Steel Carbon Steel
C (%) 0.42-0.50 0.42-0.50
Si (%) 0.15-0.40 0.10-0.40
Mn (%) 0.50-0.80 0.50-0.80
P (%) <=0.045 <=0.035
S (%) <=0.045 <=0.035
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property UNI 7845 C45 SS 14 21 72 2172
Tensile Strength 620-800 MPa 620-800 MPa
Yield Strength 340-490 MPa 340-490 MPa
Elongation 14-20 % 14-20 %
Hardness 179-235 HB 179-235 HB
Typical Applications
UNI 7845 C45
shafts,axles,gears,studs,bolts,spindles,rollers,general engineering components
SS 14 21 72 2172
shafts,axles,gears,studs,bolts,general engineering components,machine parts
Can UNI 7845 C45 Be Substituted With SS 14 21 72 2172?
UNI 7845 C45 and SS 14 21 72 2172 overlap closely enough on chemistry and mechanical properties that SS 14 21 72 2172 is often considered as a substitute for UNI 7845 C45 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
UNI 7845 C45
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5500–6600 mm (216.54–259.84 in)
SS 14 21 72 2172
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6200–6200 mm (244.09–244.09 in)
On M-EX Right Now
UNI 7845 C45
2 active listings and RFQs →
SS 14 21 72 2172
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between UNI 7845 C45 and SS 14 21 72 2172?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can UNI 7845 C45 be substituted with SS 14 21 72 2172?
UNI 7845 C45 and SS 14 21 72 2172 overlap closely enough on chemistry and mechanical properties that SS 14 21 72 2172 is often considered as a substitute for UNI 7845 C45 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.