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GB/T 1591 Q690MD vs AS/NZS 3679.1 300

Minimal Match — 34.1% match based on chemical composition and mechanical property overlap.

GB/T 1591 Q690MD (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 Q690MD 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 Q690MD 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 Q690MD vs AS/NZS 3679.1 300 is a 51.2% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 34.1%.

Frequently Compared With GB/T 1591 Q690MD:
ASTM A283C CSA G40.21 260W CSA G40.21 300W AS/NZS 3679.1 350 CSA G40.21 400W ASTM A572 Gr.65
Other Structural Steel Grades to Compare With GB/T 1591 Q690MD:
GOST 19281 09G2S CSA G40.21 350W CSA G40.21 400A CSA G40.21 480W ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80
Match Breakdown
CHEMISTRY MATCH
51.2%
MECHANICAL MATCH
0%
OVERALL
34.1%
Specifications
Property GB/T 1591 Q690MD 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 (%) <=0.025 <=0.040
Nb (%) 0.01-0.11 Not specified
V (%) 0.01-0.12 Not specified
Ti (%) 0.006-0.05 Not specified
Cr (%) <=1.00 Not specified
Ni (%) <=0.80 Not specified
Cu (%) <=0.80 Not specified
Mo (%) <=0.30 Not specified
N (%) <=0.025 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 Q690MD AS/NZS 3679.1 300
Tensile Strength 770-940 MPa 440-600 MPa
Yield Strength >=690 MPa 300 MPa min
Elongation >=14% 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 Q690MD
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 Q690MD Be Substituted With AS/NZS 3679.1 300?
GB/T 1591 Q690MD 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 Q690MD
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 Q690MD
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 Q690MD and AS/NZS 3679.1 300?
GB/T 1591 Q690MD specifies Nb, V, Ti, Cr which are not specified for AS/NZS 3679.1 300.
Can GB/T 1591 Q690MD be substituted with AS/NZS 3679.1 300?
GB/T 1591 Q690MD 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.