Cold Work Tool Steel 1.2550 - 副本

$2400 - $3000

Norms: ISO 4957/DIN 17350;
Size range: round bar dia20mm - dia 600mm;
flat 10 - 400mm x 100 - 800mm;
Surface condition: round bar, gound / rough
turned / polished;
flat, black / rough machined;
Packing: seaworthy packing.

Cold work tool steel 1.2550

Standard	Grade
AISI/SAE	~S1
W.Nr/DIN	1.2550
GB	6CrW2Si

Tool steel 1.2550 Chemical Composition (%)

C	Si	Mn	Cr	W	V
0.55-0.65	0.50-0.70	0.15-0.45	0.90-1.20	1.80-2.10	0.10-0.20

Hot Forming

Forging: 1050 to 850℃, slowing cooling in furnace.

Heat Treatment

Annealing: 710 to 750℃, slow cooling in furnace (10-20℃/hr), down to approx. 600℃, cooling in air. Hardness after annealing: max. 225HB.

Stress relieving: approx. 650℃, slow cooling in furnace. Hold in neutral atmosphere for 1 to 2hours.

Hardening: 870 to 900℃, oil. Hold 15 to 30 minutes. Hardness obtainable, 58 to 62 HRC.

Tempering: for hot work, 550 to 600℃; for cold work, 200 to 300 ℃. Slowly heating to tempering temperature right after hardening. Recommended to temper 2 or 3 times to increase toughness.

Tempering ℃	200	300	400	500
HRC	60	57	54	49

* Hardening temperature: 880℃, specimen size: dia25mm

Surface treatment

Nitriding: suitable for both bath or gas nitriding.、

Properties of tool steel 1.2550

Tough, shockproof steel with fairly good edge retaining properties. Moderate deep hardening properties in case of long sections.

Applications of tool steel 1.2550

Suited for both hot and cold work applications. Cutting tools (dies and punches) for the processing of plate; cold punches and shear blades; wood working, coining and pneumatic tools. Hot work tools for use at moderate heat.

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