1.4418 X4CrNiMo16-5-1 Stainless Steel Bar

Item specifics

Delivery condition: annealed

Surface condition: Black, Machined

Review

Description

1.4418 X4CrNiMo16-5-1 Stainless Steel

Grade : X4CrNiMo16-5-1

Number:1.4418

Classification: Martensitic stainless steel

Density:7.7 g/cm³

Our supply size :

Diameter : 80 to 600 mm ;

Length : 1000 to 9000 mm ;

Our advantage :

1. High Quality, Reasonable Price

2. Over 40 Years Experience

3. ISO NQA Certificated Factory

4. Worldwide shipping

5. Emergency Orders and Fast Delivery

Equivalent grades of steel X4CrNiMo16-5-1 (1.4418)

EU	France	Sweden
EN	AFNOR	SS
X4CrNiMo16-5-1	Z6CND16-05-01	2387

Chemical composition % of steel X4CrNiMo16-5-1 (1.4418): EN 10088-2-2005

C	Si	Mn	Ni	P	S	Cr	Mo	N
max 0.06	max 0.7	max 1.5	4 - 6	max 0.04	max 0.015	15 – 17	0.8 – 1.5	max 0.02

Standard:

EN 10088-2: 2005 Stainless steels. sheet/plate and strip of corrosion resisting steels for general purposes

EN 10088-3: 2005 Stainless steels. semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels

EN 10028-7: 2007 Flat products made of steels for pressure purposes. Stainless steels

EN 10272: 2007 Stainless steel bars for pressure purposes

EN 10250-4: 2000 Open steel die forgings for general engineering purposes. Stainless steels

EN 10088-1: 2005 Stainless steels. List of stainless steels

EN 10088-5: 2009 Stainless steels. bars, rods, wire, sections and bright products of corrosion resisting steels

EN 10088-4: 2009 Stainless steels. sheet/plate and strip of corrosion resisting steels

Introduce:

1.4418 is a martensitic stainless steel which combines very high strength and hardness with good corrosion resistance equivalent to the austenitic types, 1.4301 and 1.4307. Otherwise, the usual situation is that the high strength of martensitic steels is achieved at the expense of the anti-corrosion properties. The steel contains about 16% chromium together with 5% nickel and 1% molybdenum. Furthermore, and at variance with other martensitic stainless steels, its carbon content is low. The bars in stock are in the quenched-and-tempered condition with minimum tensile strength 900 MPa and typical hardness 300 HB.

Ground round bars in 1.4418 are standardised in EN 10088-3 and the heat-treatment condition is designated “+QT 900”. This standard covers cold-finished round bars with diameters up to 250 mm even though it is normally only smaller dimensions that are available in ground execution. However, Tibnor’s extensive programme encompasses diameters up to and including 125 mm.

In spite of its high strength, 1.4418 is characterised by good resistance to corrosion in neutral water both indoors and outdoors. The steel also exhibits immunity from atmospheric corrosion. The comparatively good corrosion properties in combination with higher strength render 1.4418 as an attractive alternative for machine components exposed to corrosive environments such as pump parts, axles and in the energy segment (water power, offshore).

Cold forming of 1.4418 is quite difficult because of the high strength. On the other hand, the low carbon content means that for a martensitic steel, it is quite easy to weld. In parity with the high hardness, machining of 1.4418 can be quite difficult but working is always facilitated through bespoke tooling. However, in reality, 1.4418 is no more difficult to machine than quenched-and-tempered carbon steels with the same hardness.

The surface finish of ground bars of 1.4418 as stocked is 2G as defined in EN 10088-3. Grinding is carried after hot-rolled bars have been quenched and tempered, pickled as needed and the surface pre-processed through either cold drawing or peeling. This procedure eliminates any remaining surface defects. The diameter tolerance of ground bars is h9 as stipulated in ISO 286 – 2 which is a zero-minus tolerance. In other words, the actual diameter is marginally less than the nominal one. In addition, ground bars of stainless steel are very straight (height of arc less than 0.001 x length) with fine surface (Ra <1µm).