A prehardened mold steel (300 HB/32 HRC) for thick sections

W1.2738 is a 300HB (32HRC) prehardened grade specially designed for plastic mold industry.

Chromium, Molybdenum, Nickel and Manganese additions are optimized to have a fully martensite – bainite microstructure after quenching. The high nickel content (1%) is specially adapted to ensure a perfect homogeneity of structure and hardness through thickness even for thick blocks (up to 700 mm/28’’).

The steel is melted in electrical furnace and refined with VOD or DH device. The cleanliness of the steel is guaranteed as well as the soundness. This makes the steel particularly well adapted for mold even when polishing or chemical etching are required for surface finish quality.

Standard
• EN: 40 CrMnNiMo 8-6-4
• Werkstoff: W1.2738
• AISI: ≈ P20 + Ni

Chemical Analysis
Typical values (weight%). Typical Industeel analysis

C	S max	P max	Si	Mn	Ni	Cr	Mo
.4	.005	.012	0.3	1.5	1.0	1.9	.2

Mechanical Properties

Transverse direction	Hardness	Y.S 0.2		UTS		Elongation 5.65	Red.of area	Elastic modulus
	HB	MPa	ksi	MPa	ksi	%	z%	GPa	ksi
	300	826	120	993	144	17	49	205	29745

Delivery Conditions
Dimensional program

Thickness		Width	Length
20 – 120 mm (.8″ – 5″)		1500 – 2500 mm (59″ – 98″)	up to 6 m (20 ft)
120 – 600 mm (5″ – 23.5″)		1500 – 2100 mm (59″ – 83″)
600 – 700 mm (24″ – 28″)		-> Contact the mill

PDF: http://www.industeel.info/wp-content/uploads/2016/01/DS-MOLD-W12738.pdf