X33CrS16
1.2085Pre-hardened corrosion-resistant mould steel (30–36 HRC as delivered). 16% Cr provides stainless-like corrosion resistance — no surface pitting during storage, no rust contamination of moulded parts. Sulfur addition improves machinability. Used for moulds processing corrosive plastics (PVC, acetals, flame-retardant compounds), food packaging moulds, moulds stored in humid environments and prototype tooling. Can be directly machined in pre-hardened state without additional heat treatment.
Chemical composition comparison (wt%)
Side-by-side: X33CrS16 (EN) (EN ISO 4957) vs ASTM
| Element | X33CrS16 (EN) | ASTM | Overlap |
|---|---|---|---|
| C | 0.28–0.38% | — | — |
| Si | ≤ 1% | — | — |
| Mn | ≤ 1.5% | — | — |
| S | 0.05–0.1% | — | — |
| Cr | 15–17% | — | — |
Mechanical properties
Pre-hardened (delivered)
| Property | Value | Unit |
|---|---|---|
| Hardness HRC | 30–36 | HRC |
| Tensile Strength | 1000–1200 | MPa |
General
| Property | Value | Unit |
|---|---|---|
| Density | 7.7 | g/cm³ |
Related materials
P20 / 40CrMnMo7
1.2311Pre-hardened plastic mold steel (usually delivered at 28-34 HRC). The most widely used mold base steel globally. Good machinability in pre-hardened condition, good polishability. Used for injection molds, die-casting dies, extrusion tooling, and structural mold components.
M2 / HS6-5-2
1.3343The most widely used high-speed steel worldwide. W-Mo-Cr-V composition gives excellent red hardness (cuts at temperatures up to 600°C). Used for twist drills, end mills, taps, reamers, bandsaw blades, and general-purpose cutting tools. The benchmark HSS grade.
X45NiCrMo4
1.2767Nickel cold-work tool steel with exceptional toughness from ~4% Ni content. Excellent through-hardenability, polishability, and impact resistance. Used for plastic injection molds (high-gloss), embossing dies, scrap shear blades, punches, cutlery dies, and bending tools.
Not sure which material fits?
🤖 Ask AI Advisor →All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.