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DUROSTAT 400

Chemical composition

C max %	Si max %	Mn max %	P max %	S max %	Altot. min %	Cr max %	Mo max %	B max %	Ti max %
0.18	0.60	2.10	0.025	0.010	0.020	1.00	0.50	0.005	0.050

The steel is fine-grain melted and can contain microalloying elements such as Nb and V.

Carbon equivalent

CEV1)	CET2)
0.47	0.30

1) CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, according to IIW
2) CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40, according to SEW 088

As-delivered condition

The high level of hardness is achieved by online accelerated cooling or conventional quenching.

Hardness

360 - 440 HB.

Mechanical properties

Standard values for as-delivered condition (for 20 mm plate thickness)

Yield strength N/mm2	Tensile strength N/mm2	Fracture elongation L0 = 5,65 √ S0 %
1,000	1,250	10

Quality test

Brinell hardness is measured according to ISO 6505 per heat and for every 40 t. Hardness is measured approx. 1mm under the surface. The heat analysis is provided as proof of the chemical composition.

Tolerances and surface finish

Unless otherwise agreed, tolerances according to EN 10029 (thickness tolerance according to class A, flatness tolerance according to class N) and surface finish according to EN 10163-A1 are valid.

Marking

In general, marking consists of:

• voestalpine symbol
• Steel grade designation
• Heat number
• Plate number

Material testing certificate

Type of certificate according to EN 10204 must be agreed upon ordering.