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AS/NZS 3678 Grade 350WR vs ASTM A588 Grade B

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 350WR (AS/NZS 3678:2016) and ASTM A588 Grade B (ASTM A588) are both steel grades. Both fall under the Structural Steel (Corten / Weathering) category. AS/NZS 3678 Grade 350WR is typically used for weather-resistant (corrosion-resistant) structural steel; exposed bridge and structural applications requiring atmospheric corrosion resistance, while ASTM A588 Grade B is commonly used for high-strength low-alloy structural steel with atmospheric corrosion resistance (weathering steel); bridges, transmission/communication towers, gusset plates, exposed structural applications. AS/NZS 3678 Grade 350WR is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while ASTM A588 Grade B is defined under ASTM International, originating from United States.

As per chemical composition, AS/NZS 3678 Grade 350WR vs ASTM A588 Grade B is a 77.3% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With AS/NZS 3678 Grade 350WR:
EN 10025-5 S355J0WP CSA G40.21 350A ASTM A588 JIS G3114 SMA400 EN 10025-5 S355J2W EN 10025-5 S355J2WP CSA G40.21 50W ASTM A588 Grade A CSA G40.21 260WT ASTM A709 Grade HPS 70W CSA G40.21 480A EN 10025-5 S235J2W
Match Breakdown
CHEMISTRY MATCH
77.3%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property AS/NZS 3678 Grade 350WR ASTM A588 Grade B
Standard AS/NZS 3678:2016 ASTM A588
Category Structural Steel (Corten / Weathering) Structural Steel (Corten / Weathering)
C (%) <=0.20 <=0.20
Mn (%) <=1.70 0.75-1.25
Si (%) <=0.50 0.15-0.30
P (%) <=0.035 <=0.040
S (%) <=0.035 <=0.050
Cu (%) 0.25-0.55 0.20-0.40
Cr (%) 0.40-0.80 0.40-0.70
Ni (%) <=0.65 <=0.50
Mo (%) Not specified 0.02-0.10
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 350WR ASTM A588 Grade B
Tensile Strength 480-620 MPa 485 MPa min
Yield Strength 350 MPa min 345 MPa min
Elongation 20% min 18% min
Hardness Not specified 140-190 HB
Typical Applications
AS/NZS 3678 Grade 350WR
Weather-resistant (corrosion-resistant) structural steel; exposed bridge and structural applications requiring atmospheric corrosion resistance
ASTM A588 Grade B
High-strength low-alloy structural steel with atmospheric corrosion resistance (weathering steel); bridges, transmission/communication towers, gusset plates, exposed structural applications
Key Differences
Can AS/NZS 3678 Grade 350WR Be Substituted With ASTM A588 Grade B?
AS/NZS 3678 Grade 350WR and ASTM A588 Grade B 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 350WR
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–2800 mm (98.43–110.24 in)
ASTM A588 Grade B
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3100–3200 mm (122.05–125.98 in)
On M-EX Right Now
AS/NZS 3678 Grade 350WR
2 active listings and RFQs →
ASTM A588 Grade B
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 350WR and ASTM A588 Grade B?
ASTM A588 Grade B specifies Mo which is not specified for AS/NZS 3678 Grade 350WR.
Can AS/NZS 3678 Grade 350WR be substituted with ASTM A588 Grade B?
AS/NZS 3678 Grade 350WR and ASTM A588 Grade B 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.