ROBAMAG
INOX - 13Rm19

*Unified Numbering System (USA)

Characteristics and main uses

Stainless steel with the particularity of being almost 100% non-magnetic in the hardened state thanks to the high manganese content. A layer of manganese oxide (whitish) can easily appear on the surface during heat treatment.

• Non-magnetic structure in all conditions
• High mechanical strength under cold rolling conditions. The resistance can be further increased by quenching, without any effect on the non-magnetic structure.
• High yield strength and energy storage capacity in cold rolled and tempered condition, which is important for spring applications.
• Operating temperature: up to 250 ° C (480 ° F)
• Corrosion resistance comparable to that of ASTM 301/304 (The high nitrogen content is known to be beneficial for resistance to pitting and crevice corrosion. However, all austenitic steels of this type are susceptible to cracking stress corrosion cracking (SCC) when in contact with chloride solutions at elevated temperatures.)

Main uses

• Spring and other components in the electronics and computer industries
• Printer components
• Springs for generators
• Electronic instrument enclosures
• Measuring instrument components
• Zipper parts and other components requiring non-magnetic properties
• Surgical tools
• Equipment for an open architecture in which surgery is performed simultaneously with magnetic resonance imaging.
• Reinforcement for high voltage cable where transmission losses must be kept low.

1 poor | 2 average | 3 good | 4 very good | - no info

Comments on heat treatments

The Rm can be increased from 100 to 200 Mpa with a treatment of 2 hours at 480 ° C (decreases by 1 or 2% the elongation)

Heat treatment condition

The strength of cold rolled steel can be increased by a tempering operation at 480 ° C for 2 hours. For cold rolled Robamag 13RM19 with tensile strength greater than about 1400 MPa, an increase in tensile strength of about 100 to 200 MPa (14.5 to 29 ksi) can be expected. This heat treatment is also beneficial for relaxation and resistance to fatigue.

Tempering is normally done by the customer after forming. To avoid discoloration, parts should be thoroughly cleaned before heat treatment.

Quenching in open air furnaces gives a harmless brownish oxide on the surface.