Post Stock Login Register

GB/T 1591 Q550MC vs AS/NZS 3679.1 300

Minimal Match — 34% match based on chemical composition and mechanical property overlap.

GB/T 1591 Q550MC (GB/T 1591:2018) and AS/NZS 3679.1 300 (AS/NZS 3679.1:2016) are both steel grades. Both fall under the Structural Steel category. GB/T 1591 Q550MC is typically used for general structure for engineering (plates, strips, bars and sections), while AS/NZS 3679.1 300 is commonly used for hot-rolled structural bars and sections for general structural framing. GB/T 1591 Q550MC is defined under Guobiao Standards (GB/T), originating from China, while AS/NZS 3679.1 300 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, GB/T 1591 Q550MC vs AS/NZS 3679.1 300 is a 51.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 34%.

Frequently Compared With GB/T 1591 Q550MC:
CSA G40.21 260W CSA G40.21 300W AS/NZS 3679.1 350 CSA G40.21 350W CSA G40.21 400A CSA G40.21 400W CSA G40.21 480W ASTM A1008 SS Grade 80 ASTM A283C GOST 19281 09G2S ASTM A1008 SS Grade 50 ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
51.1%
MECHANICAL MATCH
0%
OVERALL
34%
Specifications
Property GB/T 1591 Q550MC AS/NZS 3679.1 300
Standard GB/T 1591:2018 AS/NZS 3679.1:2016
Category Structural Steel Structural Steel
C (%) <=0.18 <=0.22
Si (%) <=0.60 <=0.50
Mn (%) <=2.00 <=1.70
P (%) <=0.030 <=0.040
S (%) <=0.030 <=0.040
Nb (%) 0.01-0.11 Not specified
V (%) 0.01-0.12 Not specified
Ti (%) 0.006-0.05 Not specified
Cr (%) <=0.80 Not specified
Ni (%) <=0.80 Not specified
Cu (%) <=0.80 Not specified
Mo (%) <=0.30 Not specified
N (%) <=0.015 Not specified
B (%) <=0.004 Not specified
Al (%) >=0.015 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 Q550MC AS/NZS 3679.1 300
Tensile Strength 670-830 MPa 440-600 MPa
Yield Strength >=550 MPa 300 MPa min
Elongation >=16% 22% min
Condition Thermomechanical processed (TMCP), nominal thickness or diameter up to 16 mm (tensile strength: up to 40 mm) Not specified
Typical Applications
GB/T 1591 Q550MC
General structure for engineering (plates, strips, bars and sections)
AS/NZS 3679.1 300
Hot-rolled structural bars and sections for general structural framing
Key Differences
Can GB/T 1591 Q550MC Be Substituted With AS/NZS 3679.1 300?
GB/T 1591 Q550MC and AS/NZS 3679.1 300 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
GB/T 1591 Q550MC
No active listings currently.
AS/NZS 3679.1 300
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–2700 mm (106.3–106.3 in)
On M-EX Right Now
GB/T 1591 Q550MC
0 active listings and RFQs →
AS/NZS 3679.1 300
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 1591 Q550MC and AS/NZS 3679.1 300?
GB/T 1591 Q550MC specifies Nb, V, Ti, Cr which are not specified for AS/NZS 3679.1 300.
Can GB/T 1591 Q550MC be substituted with AS/NZS 3679.1 300?
GB/T 1591 Q550MC and AS/NZS 3679.1 300 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.