Material page for self-undercutting mechanical anchors in A2 Stainless Steel (ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70). The sizes below are the ones we supply; there is no published dimensional standard for this article, so the table rather than a standard number is what to quote. Corrosion behaviour is good general corrosion resistance and the service range is approx. -200 °C to +400 °C, subject to the property class and the joint.
Why Choose A2 Stainless Steel for Self-Undercutting Mechanical Anchors
The most common stainless group for indoor and general outdoor fasteners. For self-undercutting mechanical anchors, this matters when good general corrosion resistance is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70 |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C, subject to the property class and the joint |
| Corrosion characteristic | Good general corrosion resistance |
Corrosion Behavior in Service
A2 (304) gives excellent atmospheric and most-water corrosion resistance and is the most common stainless for Self-Undercutting Mechanical Anchors in indoor and general outdoor service. In chloride-bearing environments (marine air, road salt, swimming pools) consider stepping up to A4 (316).
Comparable Grades
For Self-Undercutting Mechanical Anchors, the alternative stainless grade is A4 (316). The practical dividing line is chlorides: A2 (304) is fine until salt is involved, and A4 (316) exists for the cases where it is — coastal, marine and road-salt service. Neither reaches the strength of a plated class 8.8 or 10.9 fastener.
Using Stainless Fasteners in Aluminum
The galvanic couple here runs the wrong way: aluminum is the less noble metal, so it corrodes and the fastener does not. What governs the rate is the ratio of areas — a large anode and a small cathode is a tolerable combination, the reverse concentrates the attack into thin material around the hole. An isolating washer plus sealant breaks the circuit; where that is impractical, match the fastener to the substrate.
Sizes of Self-Undercutting Mechanical Anchors Available in A2 Stainless Steel
| Anchor size | Available embedment options (mm) | Maximum fixture thickness options (mm) | Finish | Load cases |
|---|---|---|---|---|
| M10 | 100 / 125 / 190 / 250 | 20 / 30 / 40 / 50 / 60 / 100 | electro-zinc plated, minimum 5 µm | static / dynamic / seismic |
| M12 | 100 / 125 / 190 / 250 | 20 / 30 / 40 / 50 / 60 / 100 | electro-zinc plated, minimum 5 µm | static / dynamic / seismic |
| M16 | 100 / 125 / 190 / 250 | 20 / 30 / 40 / 50 / 60 / 100 | electro-zinc plated, minimum 5 µm | static / dynamic / seismic |
| M20 | 100 / 125 / 190 / 250 | 20 / 30 / 40 / 50 / 60 / 100 | electro-zinc plated, minimum 5 µm | static / dynamic / seismic |
Dimensions are independent of the material: the table above lists the sizes supplied, and on this page every one of them is quoted in A2 Stainless Steel. The catalogue's default material column has been omitted here so it cannot be read as contradicting that.
Custom manufacturing · Made to drawing
Need this anchor & concrete fixing in a grade that is not listed?
A2 Stainless Steel is one of the grades the catalog describes. Embedment depth, thread size, body length and corrosion protection are the variables; capacity remains a concrete design value, not a property of the anchor alone. Made by hot forging or thread rolling.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
