What is 1.6956 (33NiCrMoV14-5)
1.6956 (33NiCrMoV14-5) is a versatile quenched and tempered steel characterized by high strength and toughness. Its robust mechanical properties make it suitable for highly stressed components and demanding applications in mechanical and automotive engineering.
International identifiers
Properties of the material 1.6956 (33NiCrMoV14-5)
Mechanical properties
Up to diameter d 655 mm according to 3.1 inspection certificate:
| Hardness: | 251-315 HBW |
| 0,2 %-Yield strength: | 650 MPa |
| Tensile Strength: | 800 to 1000 MPa |
| Reduction in area (longitudinal): | min. 13 % |
| Impact test (ISO-V) longitudinal: | min. 60 J at -30°C |
Processing
- Very difficult to weld.
- Not suitable for welded structures.
- If welding is unavoidable: preheat to approx. 400 °C.
- Followed by post-weld heat treatment at approx. 600 °C.
- Even better: re-quench and temper after welding.
Calculate the weight quickly and easily
Heat treatment 1.6956
Chemical composition of 1.6956
| 1.6956 (33NiCrMoV14-5) | C | Si | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|
| min. | 0,28 | 0,15 | - | - | 1,00 | 0,30 | |
| max. | 0,38 | 0,40 | 0,40 | 0,035 | 0,035 | 1,70 | 0,60 |
| 1.6956 (33NiCrMoV14-5) | Ni | V | Al | Cu | Ti |
|---|---|---|---|---|---|
| min. | 2,90 | 0,08 | - | ||
| max. | 3,80 | 0,25 | 0,30 |
Areas of application for 1.6956
Areas of application
- Mechanical engineering
- Automotive engineering
- Manufacturing of high-strength components
- Automotive components
- Mold frame components
- Die-casting machines
Instructions for use
- Suitable for components with high requirements for strength and toughness.
- As a quenched and tempered steel, its mechanical properties can be adjusted to the desired values through appropriate heat treatment.
- Suitable for highly stressed components subject to dynamic and mechanical loads.
- The heat treatment condition and the desired final properties should be taken into account during processing.
Form of supply and availability of 1.6956
In stock
Immediately available from stock
Form of supply
Rounds steel bars dia 655 mm, forged, quenched and tempered (see at mechanical properties); pre-machined
Sawn blank
The machining by our saws is a mechanical step of processing of this material products, which results in a significantly lower unintended deformation and increased hardness for the existing structure, such as the thermal cutting. This approach allows finishing of the workpiece by milling or drilling, immediately. So it isn´t necessary to anneal the material or make any similar operation beforehand.
Frequently asked questions about material 1.6956:
It is an extremely high-performance nickel-chromium-molybdenum-vanadium steel. The additional alloying with vanadium produces a fine-grained microstructure that ensures an exceptionally high tensile strength of up to 1,470 N/mm² combined with outstanding impact toughness, even in massive component cross-sections (often exceeding 250 mm in diameter).
1.6956 (33NiCrMoV14-5) has a higher carbon content (approx. 0.33%) and therefore achieves a higher maximum tensile strength for highly stressed structures such as heavy mold frames. 1.6957 (26NiCrMoV14-5) has a reduced carbon content (approx. 0.26%), which provides even greater toughness and thermal crack resistance in extremely massive components, such as large generator and turbine shafts used in power engineering.
Machining should preferably be carried out in the soft-annealed condition, as the steel is difficult to machine in the quenched and tempered (+QT) condition and can cause increased tool wear. In addition, according to industry information, the material is not suitable for welded structures.
Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!