AR400 equivalent grades: ASTM, EN, JIS, GB, DIN
AR400 is abrasion-resistant quenched and tempered plate, nominal 400 HBW specified in . Substitutes are collected here from 3 standard systems; the grading column says whether a certificate covers the swap or an engineer has to. The full AR400 data sheet carries the composition and mechanical tables.
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Mills routinely dual-certify AR400 as Hardox 400 — the limits sit inside each other in both directions. A single clause separates AR450, AR500, AR450: differ either a test temperature or a composition bound that the other does not. At the functional level A514, S355J2, S690QL and 1 more serve as a replacement once the design has been re-run. Counted by system: 4 in Proprietary (trade names), 1 in ASTM / ASME, 3 in EN (European).
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| Hardox 400 | Proprietary (trade names) | Identical | SSAB's product in this class and the usual reference point. Specifying it by name means specifying one supplier; specifying the properties — through-thickness hardness band, guaranteed impact energy and temperature, bend radius at thickness, tolerance class — lets several mills quote the same requirement. |
| AR450 | Proprietary (trade names) | Near | The next hardness class, 425–475 HBW. Roughly 20–30 % longer life in pure abrasion for a higher plate price and a noticeably harder fabrication: larger bend radii, more preheat, slower cutting. The step is worth making where plate changes are the dominant cost and the part is simple. |
| AR500 | Proprietary (trade names) | Near | 470–530 HBW. The practical limit for a plate that still has to be bent and welded; above it formability and weldability fall away quickly and the plate becomes a liner rather than a structure. |
| AR450 | Proprietary (trade names) | Near | The 450-class product, and in most ranges the volume seller rather than the 400 — which is worth knowing when comparing prices, because the better-stocked thickness is often the cheaper one per kilogram. |
| A514 | ASTM / ASME | Functional | ASTM A514 (historically T-1): quenched and tempered alloy structural plate at 690 MPa minimum yield, about 235–290 HBW. Frequently confused with wear plate on American drawings; it is a structural specification with no hardness requirement. |
| S355J2 | EN (European) | Functional | EN 10025-2 S355J2 at roughly 150 HBW. Listed as the benchmark: in sliding abrasion AR400 lasts about **three to four times** as long, which is the whole economic case for wear plate. S355J2 is what the surrounding structure is made of. |
| S690QL | EN (European) | Functional | EN 10025-6 S690QL: quenched and tempered **structural** plate at 690 MPa minimum yield, around 250 HBW. The closest thing to a standardised grade in this territory, and the key distinction — EN 10025-6 specifies plate by strength, not hardness, and stops far short of 400 HBW. It is the grade for a load-carrying member, not a wearing surface. |
| 1.2379 | EN (European) | Functional | X153CrMoV12 (D2) at 58–62 HRC, roughly 700 HBW. Far more abrasion resistant and entirely unsuitable for this job: it cannot be bent, barely welded, and is sold in tool sizes. Listed to mark the boundary — above about 600 HBW the answer is a tool steel, a carbide overlay or a ceramic liner, not a thicker wear plate. |
Identical, near and functional are defined once on the grade index; the reason column below says which limit differs in each case.
AR400 in Proprietary (trade names)
- Hardox 400 — Identical SSAB's product in this class and the usual reference point. Specifying it by name means specifying one supplier; specifying the properties — through-thickness hardness band, guaranteed impact energy and temperature, bend radius at thickness, tolerance class — lets several mills quote the same requirement.
- AR450 — Near The next hardness class, 425–475 HBW. Roughly 20–30 % longer life in pure abrasion for a higher plate price and a noticeably harder fabrication: larger bend radii, more preheat, slower cutting. The step is worth making where plate changes are the dominant cost and the part is simple.
- AR500 — Near 470–530 HBW. The practical limit for a plate that still has to be bent and welded; above it formability and weldability fall away quickly and the plate becomes a liner rather than a structure.
- AR450 — Near The 450-class product, and in most ranges the volume seller rather than the 400 — which is worth knowing when comparing prices, because the better-stocked thickness is often the cheaper one per kilogram.
AR400 in ASTM / ASME
- A514 — Functional ASTM A514 (historically T-1): quenched and tempered alloy structural plate at 690 MPa minimum yield, about 235–290 HBW. Frequently confused with wear plate on American drawings; it is a structural specification with no hardness requirement.
AR400 in EN (European)
- S355J2 — Functional EN 10025-2 S355J2 at roughly 150 HBW. Listed as the benchmark: in sliding abrasion AR400 lasts about **three to four times** as long, which is the whole economic case for wear plate. S355J2 is what the surrounding structure is made of.
- S690QL — Functional EN 10025-6 S690QL: quenched and tempered **structural** plate at 690 MPa minimum yield, around 250 HBW. The closest thing to a standardised grade in this territory, and the key distinction — EN 10025-6 specifies plate by strength, not hardness, and stops far short of 400 HBW. It is the grade for a load-carrying member, not a wearing surface.
- 1.2379 — Functional X153CrMoV12 (D2) at 58–62 HRC, roughly 700 HBW. Far more abrasion resistant and entirely unsuitable for this job: it cannot be bent, barely welded, and is sold in tool sizes. Listed to mark the boundary — above about 600 HBW the answer is a tool steel, a carbide overlay or a ceramic liner, not a thicker wear plate.
Superseded names for AR400
- Hardox 400 — SSAB trademark: The reference product of this class and the name most often written on drawings. Hardox is a registered trademark of SSAB; naming it here describes the product, nothing more.
- XAR 400 — ThyssenKrupp trademark: Dillidur 400 (Dillinger), Durostat 400 (voestalpine), Brinar 400 are the other German-origin names in the class.
- Quard 400 / Raex 400 — NLMK / SSAB trademarks: Abrazo 400 (Ancofer), Creusabro 4800 (ArcelorMittal, a different metallurgical approach), Everhard 400 (JFE).
- T-1 / Jalloy — older US trade names: Historic quenched and tempered plate brands; T-1 corresponds to ASTM A514 structural plate rather than to a wear grade, and the two are often confused on old drawings.
Key data for AR400
Carbon≤ 0.23 %
Standard
Full composition, mechanical properties by thickness, heat treatment and applications for AR400 →
Verified against . Last checked: October 2026.