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AS/NZS 3678 Grade 300 vs ASTM A1008 SS Grade 50

Related Material — 65.4% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 300 (AS/NZS 3678:2016) and ASTM A1008 SS Grade 50 (ASTM A1008) 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 A1008 SS Grade 50 is commonly used for cold-rolled high-strength structural steel sheet; automotive structural components, cold-formed parts requiring moderate strength. AS/NZS 3678 Grade 300 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while ASTM A1008 SS Grade 50 is defined under ASTM International, originating from United States.

As per chemical composition, AS/NZS 3678 Grade 300 vs ASTM A1008 SS Grade 50 is a 98% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 65.4%.

Frequently Compared With AS/NZS 3678 Grade 300:
AS/NZS 3679.1 300 AS/NZS 3679.1 350 CSA G40.21 480W ASTM A1008 SS Grade 80 CSA G40.21 400W GOST 19281 09G2S CSA G40.21 260W CSA G40.21 300W CSA G40.21 400A CSA G40.21 350W ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
98%
MECHANICAL MATCH
0%
OVERALL
65.4%
Specifications
Property AS/NZS 3678 Grade 300 ASTM A1008 SS Grade 50
Standard AS/NZS 3678:2016 ASTM A1008
Category Structural Steel Structural Steel
C (%) <=0.22 <=0.20
Mn (%) <=1.70 <=1.35
Si (%) <=0.50 <=0.50
P (%) <=0.040 <=0.040
S (%) <=0.040 <=0.040
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 A1008 SS Grade 50
Tensile Strength 430-560 MPa 380 MPa min
Yield Strength 300 MPa min 340 MPa min
Elongation 22% min 14% min
Typical Applications
AS/NZS 3678 Grade 300
General fabrication, structural members, high-rise buildings, bridges, storage tanks
ASTM A1008 SS Grade 50
Cold-rolled high-strength structural steel sheet; automotive structural components, cold-formed parts requiring moderate strength
Can AS/NZS 3678 Grade 300 Be Substituted With ASTM A1008 SS Grade 50?
AS/NZS 3678 Grade 300 and ASTM A1008 SS Grade 50 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 A1008 SS Grade 50
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–3400 mm (106.3–133.86 in)
On M-EX Right Now
AS/NZS 3678 Grade 300
2 active listings and RFQs →
ASTM A1008 SS Grade 50
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 300 and ASTM A1008 SS Grade 50?
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 A1008 SS Grade 50?
AS/NZS 3678 Grade 300 and ASTM A1008 SS Grade 50 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.