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GB/T 1591 Q355C vs GB/T 1591 Q355D

Strong Match — 97.9% match based on chemical composition and mechanical property overlap.

GB/T 1591 Q355C (GB/T 1591:2018) and GB/T 1591 Q355D (GB/T 1591:2018) are both steel grades. Both fall under the Structural Steel category. GB/T 1591 Q355C is typically used for general structure for engineering (plates, strips, bars and sections), while GB/T 1591 Q355D is commonly used for general structure for engineering (plates, strips, bars and sections). GB/T 1591 Q355C is defined under Guobiao Standards (GB/T), originating from China, while GB/T 1591 Q355D is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, GB/T 1591 Q355C vs GB/T 1591 Q355D is a 96.9% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 97.9%.

Frequently Compared With GB/T 1591 Q355C:
CSA G40.21 400A CSA G40.21 400W CSA G40.21 480W
Other Structural Steel Grades to Compare With GB/T 1591 Q355C:
GOST 19281 09G2S CSA G40.21 260W AS/NZS 3679.1 300 CSA G40.21 300W AS/NZS 3679.1 350 CSA G40.21 350W ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80 ASTM A283C
Match Breakdown
CHEMISTRY MATCH
96.9%
MECHANICAL MATCH
100%
OVERALL
97.9%
Specifications
Property GB/T 1591 Q355C GB/T 1591 Q355D
Standard GB/T 1591:2018 GB/T 1591:2018
Category Structural Steel Structural Steel
C (%) <=0.20 <=0.20
Si (%) <=0.55 <=0.55
Mn (%) <=1.60 <=1.60
P (%) <=0.030 <=0.025
S (%) <=0.030 <=0.025
Cr (%) <=0.30 <=0.30
Ni (%) <=0.30 <=0.30
Cu (%) <=0.40 <=0.40
N (%) <=0.012 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GB/T 1591 Q355C GB/T 1591 Q355D
Tensile Strength 470-630 MPa 470-630 MPa
Yield Strength >=355 MPa >=355 MPa
Elongation >=22% >=22%
Condition Hot-rolled (as-rolled), nominal thickness or diameter up to 16 mm for yield; tensile strength for up to 100 mm; elongation longitudinal, up to 40 mm Hot-rolled (as-rolled), nominal thickness or diameter up to 16 mm for yield; tensile strength for up to 100 mm; elongation longitudinal, up to 40 mm
Typical Applications
GB/T 1591 Q355C
General structure for engineering (plates, strips, bars and sections)
GB/T 1591 Q355D
General structure for engineering (plates, strips, bars and sections)
Key Differences
Can GB/T 1591 Q355C Be Substituted With GB/T 1591 Q355D?
GB/T 1591 Q355C and GB/T 1591 Q355D overlap closely enough on chemistry and mechanical properties that GB/T 1591 Q355D is often considered as a substitute for GB/T 1591 Q355C in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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GB/T 1591 Q355C
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GB/T 1591 Q355D
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Frequently Asked Questions
What is the difference between GB/T 1591 Q355C and GB/T 1591 Q355D?
GB/T 1591 Q355C specifies N which is not specified for GB/T 1591 Q355D.
Can GB/T 1591 Q355C be substituted with GB/T 1591 Q355D?
GB/T 1591 Q355C and GB/T 1591 Q355D overlap closely enough on chemistry and mechanical properties that GB/T 1591 Q355D is often considered as a substitute for GB/T 1591 Q355C in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.