CA6NM heat treatment
Process and temperature of CA6NM heat treatment
CA6NM Heat treatment
There are usually three ways of heat treatment for CA6NM martensitic stainless steel
- High-temperature tempering
- modulation (quenching + high-temperature tempering)
- quenching + low-temperature tempering
Since martensite will be produced after air cooling, CA6NM is not suitable for cutting, so it must be softened by heat treatment before machining. CA6NM heat treatment can be divided into high-temperature tempering and complete annealing
High-temperature tempering
Alloy is heated to 1850 ° f [1010 ° C], held for 2-4 hours, and then air cooled to 200 ° f [95 ° C] or less to transform martensite into tempered sorbate. The final tempering temperature shall be between 1050 ° f [565 ° C] and 1150 ° f [620 ° C].
Full annealing
Alloy is heated to 1800 ° f [982 ° C], held for 2-4 hours, and cooled with the furnace at a slow rate, approximately 20-25 ° C / h. After cooling to 230 ° f [110 ° C], the furnace is discharged.
CA6NM heat treatment is closely related to the composition of CA6NM, which affects the application range and mode of CA6NM materials.
The following table shows the properties and specifications of CA6NM alloy
Cast Details
| ACI / CAST | CAST ASTM | CAST EN / DIN | CAST UNS | WROUGHT UNS | WROGRHT |
| CA6NM | A352，A487，A743，A757 | 1.4313 GX5CrNi134 | J91540 | S41500 | 13-4，F6NM |
CA6NM chemical composition
| chemical composition（wt％） | |||||
| C | Chromium | Ni | Mo | Other | PREN |
| <0.06 | 12.5 | 3.7 | 0.6 | – | |
Casting minimum mechanical properties
| Casting minimum mechanical properties (at 20°C) | ||||
| Rp0.2 [MPa] | Rm [MPa] | A ％ | CA6NM Hardness [HB] | impact [J] |
| 550 | 755 | 15 | 230-300 | 70 |
Physical Properties
| Physical properties (at 20°C) | |||||
| microscopic | ρ[kg / dm 3 ] | α[μm/ m∙K]（20 – 100°C） | K [W / m∙K] | Cp [J / kg∙K] | meltΔT[°C] |
| Martensite, (δ ferrite) | 7.65 | 10.5 | 22.6 | 450 | 1399-1467 |
Welding performance: good
Of course, CA6NM heat treatment material is only a way to change the chemical composition/hardness/density and other properties; in order to avoid material, we will also consider the market specification and price of this alloy. Click to contact us
