1.2738
Data verified1.2738 is P20 chemistry upgraded with about 1% nickel for through-hardening of very large molds. It keeps hardness uniform from surface to core in thick blocks and polishes better than plain 1.2311.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.35–0.45 |
| Si | 0.20–0.40 |
| Mn | 1.30–1.60 |
| Cr | 1.80–2.10 |
| Mo | 0.15–0.25 |
| Ni | 0.90–1.20 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Prehardened |
| Hardness | 290–330 HB |
| Tensile strength | 980–1150 MPa |
| Density | 7.85 g/cm³ |
Heat treatment
Supplied prehardened; nickel content keeps hardness uniform in sections over 400 mm.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.2738 |
| aisi | P20+Ni / 718 type |
| gb | 3Cr2NiMo |
Compare side by side: 1.2738 vs 1.2311 · 1.2738 vs P20
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Large automotive molds (bumpers, dashboards), appliance housings, large container molds.
Processing: Machines like 1.2311; good polishability and texturing response; suitable for nitriding.
FAQ
- When should I choose 1.2738 over 1.2311?
- When the mold block is thick (roughly >400 mm) or a high, uniform polish is required — the nickel addition prevents the soft core that plain P20-type steels develop in heavy sections.
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Ask for a quotationVisit NasteelSource: DIN / EN published grade ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.