Stainless Steel DIN 529 Type C Foundation Bolt

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Stainless Steel DIN 529 Type C Foundation Bolt Specification

Finish
Buffed, Polished

Corrosion Resistant
Yes

Grade
A2-50, A2-80, A3-50, A3-70, A3-80, A4-50, A4-80, A5-50, A5-70, A5-80, C1-50, C1-70, C3-80, C4-70, F1-45, F1-60, SS 202, SS 301, SS 302, SS 302HQ, SS 303, SS 303Se, SS 304H, SS 304N, SS 310, SS 310S, SS 310H, SS 316H, SS 316LN, SS 317, SS 317L, SS 321H, SS 347H, SS 416, SS 430, SS 431, SS 440C, SS 904L, Alloy 20, Bumax 88, Bumax 109, Nitronic 50, Nitronic 60, ASTM A193 B8 Class 1, ASTM A193 B8 Class 2, ASTM A193 B8M Class 1, ASTM A193 B8M Class 2, ASTM A320 B8, ASTM A320 B8M, ASTM A193 B6, XM-19, UNS S31254 (6-Moly)

Surface Treatment
Polishing

Drive Type
Hex

Thread Type
Metric

Shape
Y Type Bolt

Fasteners Type
Bolts

Material
Stainless Steel

Color
Self Finish

About Stainless Steel DIN 529 Type C Foundation Bolt

The Stainless Steel DIN 529 Type C Foundation Bolt is a premium, high-strength anchor fastener meticulously designed to secure structural framing, steel columns, and heavy machinery into concrete matrices. Fabricated in various stainless steel metallurgical grades, this Type C variant replaces standard carbon steel to offer exceptional resistance to rust, moisture, and chemical breakdown within structural concrete pourings.

Material grades and performance profiles

The engineering performance of the foundation bolt changes dynamically depending on the selected stainless steel grade:

Grade 304 / A2 Stainless Steel:

Properties: Standard commercial grade featuring an 18% chromium and 8% nickel composition. It provides exceptional tensile strength up to 700 MPa and basic rust-proofing.
Best for: Indoor manufacturing machinery, standard commercial architecture, and urban infrastructure shielded from aggressive chemical exposure.

Grade 316 / A4 Stainless Steel:

Properties: Premium marine-grade alloy enriched with 2% to 3% molybdenum. This protects the bolt from pitting and crevice corrosion caused by industrial solvents and chlorides.
Best for: Wastewater facilities, coastal marine docks, coastal platforms, and harsh chemical processing plants.

Grade 316L Stainless Steel:

Properties: Ultra-low carbon variation of Grade 316. It eliminates carbide precipitation during hot forging or structural field welding, maintaining maximum structural integrity near welded zones.
Best for: High-stress industrial equipment anchoring requiring structural field modifications or heavy-duty welding.

Duplex & Super Duplex Stainless Steel:

Properties: A dual-phase microstructure combining austenitic and ferritic steels. It provides roughly twice the yield strength of standard austenitic grades along with supreme stress-corrosion cracking resistance.
Best for: Severe offshore oil rigs, deep-sea marine environments, and high-pressure oil and gas pipeline supports.

Mechanical and design benefits

Mechanical anchoring mechanism: The hot-formed hooked end creates a secure physical lock inside cured concrete, transferring heavy tensile, shear, and uplift forces deep into the foundation.

Elimination of concrete staining: Unlike galvanized or plain carbon steel bolts, stainless steel grades do not rust-bleed, preserving the aesthetic and structural integrity of the surrounding concrete structure.

Surface treatments: Typically supplied with a polished or passivated finish to completely clean away surface impurities and form a highly passive, self-healing oxide film.

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