38NiCrMoV7-3 | 1.6944 Material Datasheet
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| Material Number | Material Number (single) | Standard | Standard Status | Country | Application temperature [°C] | |
|---|---|---|---|---|---|---|
| 1.6944 (WL 1.6944 : 1984-07) | 1.6944 | WL 1.6944 : 1984-07 | Valid | Germany | -75 - 175 | 1) |
| 1) Remark: The highest strength nickel-chromium-molybdenum aerospace steel is used for parts with highest strength requirements from -75 °C to 175 °C (quenched and tempered for high hardness) respectively up to 350 °C (quenched and tempered). It is not resistant to corrosion and TIG weldable. Application: e.g. gas vessels for rockets, landing gear parts, shear bolts |
Chemical Composition
| C [%] | Cr [%] | Mn [%] | Mo [%] | Ni [%] | P [%] | S [%] | Si [%] | V [%] | |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| 1) Source: blur |
Mechanical Properties
| Semi-finished Product | Condition | Condition Number | Nominal Size [mm] | Temperature [°C] | Specimen Direction | Tensile Strength [MPa] | Yield Strength (0.2% offset) [MPa] | Elongation A [%] | Reduction of Area [%] | Compressive Strength [MPa] | Shear Strength [MPa] | Hardness HB | HBW | Hardness HRC | Hardness HV | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 3) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 3) |
| 1) Source: blur | |||||||||||||||
| 2) Source: blur | |||||||||||||||
| 3) Source: blur |
Physical Properties
| Temperature [°C] | Density [g/cm³] | Young's Modulus [GPa] | Shear Modulus [GPa] | Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] | Thermal Conductivity [W/(m*K)] | Mean Specific Heat Capacity [kJ/(kg*K)] | Electric Conductivity [MS/m] | Magnetizeability | |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| 1) Source: blur |
Welding and Joining
| Procedure | Welding and Joining - Evaluation | Preheating [°C] | Holding Time [h] | Working Temperature [°C] | Added Materials | |
|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | 1)2) |
| 1) Source: blur | ||||||
| 2) Remark: blur |
Toughness Data (Impact)
| Condition | Condition Number | Temperature [°C] | Specimen Shape | Specimen Direction | Notch Impact Energy [J] | |
|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | blur | blur | 2) |
| 1) Source: blur | ||||||
| 2) Source: blur |
Heat Treatment
| Heat Treatment | Step | Temperature [°C] | Medium | |
|---|---|---|---|---|
| blur | blur | blur | blur | 1) |
| blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | 2) |
| blur | blur | blur | blur | 3) |
| blur | blur | blur | blur | 3) |
| blur | blur | blur | blur | 1)4) |
| blur | blur | blur | blur | 3) |
| blur | blur | blur | blur | 1) |
| 1) Source: blur | ||||
| 2) Source: blur | ||||
| 3) Source: blur | ||||
| 4) Remark: blur |
Cross Reference
| Material Name | Country | Standard | |
|---|---|---|---|
| FE-PL 77 | Europe | AECMA | 1) |
| 3S99 | Great Britain | BS 3 S 99 | 1) |
| 4337 | USA | AMS 6412 | 1) |
| SAE 4335 mod | USA | AMS 6435 | 1) |
| SAE 4335 mod | USA | AMS 6429 | 2) |
| 4337 | USA | SAE | 2) |
| 4335 | USA | SAE | 2) |
| SAE 4335 mod | USA | MIL-S-21515 | 2) |
| 1) Source: WL 1.6944-1 : 1984-07 | |||
| 2) Source: WL 1.6944-2 : 1984-07 |
Producer/Supplier/Trade names
| Tradename | Supplier | |
|---|---|---|
| NC 40 M 1 | AUBERT & DUVAL Deutschland GmbH, München | 1) |
| 4340 | Enpar Sonderwerkstoffe GmbH, Gummersbach | 1) |
| 38NiCrMoV7 3 | pauly STAHLHANDEL, Essen | 1) |
| Remy 1.6944 LW | Remystahl GmbH & Co. KG, Hagen | 1) |
| BÖHLER V134 (LW) | voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf | 1) |
| V134 (LW) | voestalpine BÖHLER Edelstahl GmbH & Co.KG, Kapfenberg | 1) |
| 1) Source: Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach |
Material Compliance
| REACh | RoHS |
|---|---|
| blur | blur |
Hardenability (Jominy test)
| Condition | Front Distance [mm] | Hardness HRC | |
|---|---|---|---|
| blur | blur | blur | 1)2) |
| blur | blur | blur | 1)2) |
| 1) Source: blur | |||
| 2) Remark: blur |
Fracture Toughness
| Condition | Condition Number | Temperature [°C] | Yield Strength [MPa] | Tensile Strength [MPa] | Plane-Strain Fracture Toughness KIc [MPa*m^½] | |
|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | 1)2) |
| blur | blur | blur | blur | blur | blur | 1)2) |
| blur | blur | blur | blur | blur | blur | 3) |
| 1) Source: blur | ||||||
| 2) Remark: blur | ||||||
| 3) Source: blur |
Formability - Bending - Folding
| Semi-finished Product | Condition | Nominal Size [mm] | Specimen Direction | Bend Factor (90°) | Bend Factor (180°) | |
|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | 1)2) |
| blur | blur | blur | blur | blur | blur | 1)2) |
| 1) Source: blur | ||||||
| 2) Remark: blur |
Linear-elastic
| Temperature [°C] | Young's modulus [GPa] | Bulk modulus [GPa] | Shear modulus [GPa] | Poisson's ratio |
|---|---|---|---|---|
| blur | blur | blur | blur | blur |
| blur | blur | blur | blur | blur |
| blur | blur | blur | blur | blur |
| blur | blur | blur | blur | blur |
| blur | blur | blur | blur | blur |
| blur | blur | blur | blur | blur |
| blur | blur | blur | blur | blur |
| blur | blur | blur | blur | blur |
Alternating stress
| Temperature [°C] | Stress ratio | Mean stress [MPa] | Alternating stress [MPa] | Cycles |
|---|---|---|---|---|
| blur | blur | blur | blur | blur |
| blur | blur | blur | blur | blur |
| blur | blur | blur | blur | blur |
Yield strength
| Temperature [°C] | 0.1% Proof strength [MPa] | 0.2% Proof strength [MPa] | Yield strength [MPa] |
|---|---|---|---|
| blur | blur | blur | blur |
Coefficient thermal expansion
| Related Temperature [°C] | Temperature [°C] | Coefficient thermal expansion [10^-6*K^-1] |
|---|---|---|
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
Specific heat
| Temperature [°C] | Specific heat [kJ/(kg*K)] |
|---|---|
| blur | blur |
Compressive strength
| Temperature [°C] | Compressive ultimate strength [MPa] |
|---|---|
| blur | blur |
Density
| Temperature [°C] | Density [g/cm³] |
|---|---|
| blur | blur |
Tensile strength
| Temperature [°C] | Tensile strength [MPa] |
|---|---|
| blur | blur |
Thermal conductivity
| Temperature [°C] | Thermal conductivity [W/(m*K)] |
|---|---|
| blur | blur |
Classification
| WIAM Material | Treatment | Semi-finished product | Dimension [mm] | Load type | Failure criteria | Rolling direction | Maximum stress [MPa] | Strain at maximum stress [%] | Source description |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur |
Designation
| Designation | Material number | Source |
|---|---|---|
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
| blur | blur | blur |
Tensile strength
| Temperature [°C] | Tensile strength [MPa] |
|---|---|
| blur | blur |
Classification
| WIAM Material | Treatment | Semi-finished product | Dimension [mm] | Load type | Failure criteria | Rolling direction | Maximum stress [MPa] | Strain at maximum stress [%] | Source description |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur |
Compressive strength
| Temperature [°C] | Compressive ultimate strength [MPa] |
|---|---|
| blur | blur |
Classification
| WIAM Material | Treatment | Semi-finished product | Dimension [mm] | Load type | Failure criteria | Rolling direction | Maximum stress [MPa] | Strain at maximum stress [%] | Source description |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur |
Yield strength
| Temperature [°C] | 0.1% Proof strength [MPa] | 0.2% Proof strength [MPa] | Yield strength [MPa] |
|---|---|---|---|
| blur | blur | blur | blur |
Tensile strength
| Temperature [°C] | Tensile strength [MPa] |
|---|---|
| blur | blur |
Classification
| WIAM Material | Treatment | Semi-finished product | Dimension [mm] | Load type | Failure criteria | Rolling direction | Maximum stress [MPa] | Strain at maximum stress [%] | Source description |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur |
Yield strength
| Temperature [°C] | 0.1% Proof strength [MPa] | 0.2% Proof strength [MPa] | Yield strength [MPa] |
|---|---|---|---|
| blur | blur | blur | blur |
Tensile strength
| Temperature [°C] | Tensile strength [MPa] |
|---|---|
| blur | blur |
Classification
| WIAM Material | Treatment | Semi-finished product | Dimension [mm] | Load type | Failure criteria | Rolling direction | Maximum stress [MPa] | Strain at maximum stress [%] | Source description |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur |
Compressive strength
| Temperature [°C] | Compressive ultimate strength [MPa] |
|---|---|
| blur | blur |
Classification
| WIAM Material | Treatment | Semi-finished product | Dimension [mm] | Load type | Failure criteria | Rolling direction | Maximum stress [MPa] | Strain at maximum stress [%] | Source description |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur |
Yield strength
| Temperature [°C] | 0.1% Proof strength [MPa] | 0.2% Proof strength [MPa] | Yield strength [MPa] |
|---|---|---|---|
| blur | blur | blur | blur |
Tensile strength
| Temperature [°C] | Tensile strength [MPa] |
|---|---|
| blur | blur |
Classification
| WIAM Material | Treatment | Semi-finished product | Dimension [mm] | Load type | Failure criteria | Rolling direction | Maximum stress [MPa] | Strain at maximum stress [%] | Source description |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur |
Yield strength
| Temperature [°C] | 0.1% Proof strength [MPa] | 0.2% Proof strength [MPa] | Yield strength [MPa] |
|---|---|---|---|
| blur | blur | blur | blur |
Tensile strength
| Temperature [°C] | Tensile strength [MPa] |
|---|---|
| blur | blur |
Classification
| WIAM Material | Treatment | Semi-finished product | Dimension [mm] | Load type | Failure criteria | Rolling direction | Maximum stress [MPa] | Strain at maximum stress [%] | Source description |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur |
Yield strength
| Temperature [°C] | 0.1% Proof strength [MPa] | 0.2% Proof strength [MPa] | Yield strength [MPa] |
|---|---|---|---|
| blur | blur | blur | blur |
Tensile strength
| Temperature [°C] | Tensile strength [MPa] |
|---|---|
| blur | blur |
Classification
| WIAM Material | Treatment | Semi-finished product | Dimension [mm] | Load type | Failure criteria | Rolling direction | Maximum stress [MPa] | Strain at maximum stress [%] | Source description |
|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur |