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AS/NZS 3678 Grade 300 vs ASTM A283C

Related Material — 68.6% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 300 (AS/NZS 3678:2016) and ASTM A283C (ASTM A283) are both steel grades. Both fall under the Structural Steel category. AS/NZS 3678 Grade 300 is typically used for general fabrication, structural members, high-rise buildings, bridges, storage tanks, while ASTM A283C is commonly used for used for structural fabrication, storage tanks, buildings, bridges, machinery bases, and welded structures.. AS/NZS 3678 Grade 300 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while ASTM A283C is defined under ASTM International, originating from United States.

As per chemical composition, AS/NZS 3678 Grade 300 vs ASTM A283C is a 95.1% match. As per mechanical properties, the match is 15.7%. Combined, this makes them a related material overall at 68.6%.

Frequently Compared With AS/NZS 3678 Grade 300:
AS/NZS 3679.1 350 AS/NZS 3679.1 300 CSA G40.21 480W ASTM A1008 SS Grade 80 CSA G40.21 400W GOST 19281 09G2S CSA G40.21 260W CSA G40.21 300W ASTM A1008 SS Grade 50 CSA G40.21 400A CSA G40.21 350W ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
95.1%
MECHANICAL MATCH
15.7%
OVERALL
68.6%
Specifications
Property AS/NZS 3678 Grade 300 ASTM A283C
Standard AS/NZS 3678:2016 ASTM A283
Category Structural Steel Structural Steel
C (%) <=0.22 0.24 max
Mn (%) <=1.70 0.90 max
Si (%) <=0.50 0.40 max
P (%) <=0.040 0.035 max
S (%) <=0.040 0.040 max
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property AS/NZS 3678 Grade 300 ASTM A283C
Tensile Strength 430-560 MPa 380-515 MPa
Yield Strength 300 MPa min 205 MPa min
Elongation 22% min 23-27%
Hardness Not specified 120-170 HB
Typical Applications
AS/NZS 3678 Grade 300
General fabrication, structural members, high-rise buildings, bridges, storage tanks
ASTM A283C
Used for structural fabrication, storage tanks, buildings, bridges, machinery bases, and welded structures.
Can AS/NZS 3678 Grade 300 Be Substituted With ASTM A283C?
AS/NZS 3678 Grade 300 and ASTM A283C 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
AS/NZS 3678 Grade 300
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–3100 mm (98.43–122.05 in)
ASTM A283C
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2900–3700 mm (114.17–145.67 in)
On M-EX Right Now
AS/NZS 3678 Grade 300
2 active listings and RFQs →
ASTM A283C
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 300 and ASTM A283C?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can AS/NZS 3678 Grade 300 be substituted with ASTM A283C?
AS/NZS 3678 Grade 300 and ASTM A283C 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.