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ASTM A709 Grade HPS 70W vs ASTM A959 S41026

Related Material — 58.5% match based on chemical composition and mechanical property overlap.

ASTM A709 Grade HPS 70W (ASTM A709) and ASTM A959 S41026 (ASTM A959:2011) are both steel grades. ASTM A709 Grade HPS 70W is classified under Structural Steel (Corten / Weathering), while ASTM A959 S41026 is classified under Stainless Steel — a different category, which is worth noting alongside the chemistry match below. ASTM A709 Grade HPS 70W is typically used for high-performance steel (hps) with enhanced atmospheric corrosion resistance and toughness; primary bridge girders and structural members in bridge construction, while ASTM A959 S41026 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A709 Grade HPS 70W is defined under ASTM International, originating from United States, while ASTM A959 S41026 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A709 Grade HPS 70W vs ASTM A959 S41026 is a 58.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 58.5%.

Frequently Compared With ASTM A709 Grade HPS 70W:
CSA G40.21 350A EN 10025-5 S355J0WP EN 10025-5 S355J2W ASTM A588 ASTM A588 Grade A JIS G3114 SMA400 CSA G40.21 50W AS/NZS 3678 Grade 350WR EN 10025-5 S355J2WP CSA G40.21 260WT ASTM A588 Grade B CSA G40.21 480A
Match Breakdown
CHEMISTRY MATCH
58.5%
MECHANICAL MATCH
No shared data
OVERALL
58.5%
Specifications
Property ASTM A709 Grade HPS 70W ASTM A959 S41026
Standard ASTM A709 ASTM A959:2011
Category Structural Steel (Corten / Weathering) Stainless Steel
C (%) <=0.11 <=0.15
Mn (%) 1.10-1.35 <=1.00
Si (%) 0.30-0.50 <=1.00
P (%) <=0.020 <=0.02
S (%) <=0.006 <=0.02
Cu (%) 0.25-0.40 <=0.50
Cr (%) 0.45-0.70 11.5-13.5
Ni (%) 0.70-1.00 1.00-2.00
Mo (%) 0.02-0.08 0.40-0.60
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A709 Grade HPS 70W ASTM A959 S41026
Tensile Strength 585 MPa min Not specified
Yield Strength 485 MPa min Not specified
Elongation 19% min Not specified
Hardness 170-210 HB Not specified
Typical Applications
ASTM A709 Grade HPS 70W
High-performance steel (HPS) with enhanced atmospheric corrosion resistance and toughness; primary bridge girders and structural members in bridge construction
ASTM A959 S41026
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can ASTM A709 Grade HPS 70W Be Substituted With ASTM A959 S41026?
ASTM A709 Grade HPS 70W and ASTM A959 S41026 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
ASTM A709 Grade HPS 70W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–3800 mm (98.43–149.61 in)
ASTM A959 S41026
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On M-EX Right Now
ASTM A709 Grade HPS 70W
2 active listings and RFQs →
ASTM A959 S41026
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Frequently Asked Questions
What is the difference between ASTM A709 Grade HPS 70W and ASTM A959 S41026?
Different category: ASTM A709 Grade HPS 70W is Structural Steel (Corten / Weathering), ASTM A959 S41026 is Stainless Steel.
Can ASTM A709 Grade HPS 70W be substituted with ASTM A959 S41026?
ASTM A709 Grade HPS 70W and ASTM A959 S41026 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.