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Material specification sheet Saarstahl - 22MnB4

Material No.: 1.5522 Former brand name: RKS 21 B International steel grades: BS: AFNOR: SAE:

15B21H

Material group: Chemical composition:

(Typical analysis in %)

Cold heading and cold extrusion steel according to DIN EN 10269

C 0,20 Si 0,25 Mn 1,00 other +B

Application:

Manganese und boron-alloyed cold heading and cold extrusion steel for screws and nuts.

Hot forming and heat treatment:

Soft annealing: Hardening: Tempering:

650 - 700°C/furnace 870 - 900°C/water 500 - 670°C/air

Mechanical Properties:

Naturally hard Tensile strength Rm [N/mm²] Reduction of area Z [%] max. 540 min. 55 Core hardness after oil-hardening in HRC Diameter d [mm] Hardness [HRC] min. 8 min. 42 min. 16 min. 40 min. 20 min. 36 Spheroidized annealed and spheroidized annealed + peeled max. 510 min. 63

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