Mechanical properties and chemical composition - Bredenberg Teknik

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29.03.2006

Mechanical properties and chemical composition of Ruukki's steel pile RR170/10 S440J2H 1. Back ground information The statistical data of mechanical properties of Ruukki’s steel pile RR170/10 S440J2H was collected from the manufacturing control data from the time period 1st of June 2004 until 29th of March 2006. The chemical composition values are based on typical values of material S440J2H.

2. Mechanical properties of steel grade S440J2H The mechanical properties of Ruukki’s pile material S440J2H compared to standard steel grades according to EN 10219 are shown in table below. Mechanical properties Yield strength

Tensile strength

Elongation

N/mm2

N/mm2

A5 %

S440J2H guaranteed value

440

490-630

17

measured values: mean value standard deviation minimum value maximum value

489 18 443 537

536 10 508 563

24 1.3 21 27

Impact strength o

C1)

J2)

-40

27

-40

258 20 205 310

Minimum values according to EN 10219 355 490-630 20 -20 27 S355J2H EN10219 420 500-600 19 -20 40 S420MH EN10219 460 550-720 17 -20 40 S460MH EN10219 The impact strength test of RR-piles is carried out in accordance with EN 10045-1. 1) Testing temperature 2) Minimum average value of absorbed energy (J) for standard test piece 10x10 mm2

Rautaruukki Oyj

Suolakivenkatu 1 • P.O. Box 138 FI–00811 Helsinki Finland

Tel. +358 20 5911 Fax +358 20 592 9088 www.ruukki.com

Business ID 0113276–9 VAT No. FI 01132769 Registered Office Helsinki

3/29/2006

3. Chemical composition of steel grade S440J2H The chemical composition of Ruukki’s pile material S440J2H compared to standard steel grades according to EN 10219 are shown in table below. Chemical compositions C

Si

Mn

P

S

Nb

V

Almin

Ti

Ni

Mo

N

CEV

The steel grade S440J2H for RR-piles Typical % Maximum %

0.07 0.18 0.18 0.25

1.4 0.01 0.006 0.02 0.004 0.03 0.014 0.04 0.001 0.004 0.3 1.6 0.02 0.018 0.020 0.39

S355J2H EN 10219 Maximum %

0.22 0.55

1.6 0.035 0.035

-

-

0.020

-

-

-

-

0.45

S420MH EN 10219 Maximum %

0.16

0.5

1.7 0.035 0.03 0.05 0.12

0.020

0.05

0.3

0.2

0.02

0.43

0.6

1.7 0.035 0.03 0.05 0.12

0.020

0.05

0.3

0.2

0.02

-

S460MH EN 10219 Maximum %

0.16

According to EN 10219-1 there are additional requirement for S460MH steel grade: V+Nb+Ti ≤ 0.22 % and Mo+Cr ≤ 0.30 %

4. Conclusion The statistic shows that the mechanical properties of the S440J2H steel grade fulfil the requirements S420MH according to EN 10219-1. Also the chemical composition requirements for both S420MH and S460MH are fulfilled. And S440J2H material even fulfils the options 1.4 and 1.5 according to EN 10219: - 1.4: the carbon equivalent for fine grain steels is fulfilled - 1.5: the ladle analysis V+Nb+Ti ~ 0.01 % and Mo+Cr ~ 0.04 % set for S460 are clearly under requirement The raw material for S440J2H is from thermomechanically rolled steel. Ruukki’s S440J2H fulfils all the requirements - mechanical properties and chemical composition - set for S420MH according to EN 10219.

Rautaruukki Oyj Tomi Harju R&D Manager Ruukki Construction tel. +358 20 592 5171 mobile +358 40 549 0263 fax +358 20 592 5656 email: [email protected]

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Mechanical properties and chemical composition - Bredenberg Teknik

29.03.2006 Mechanical properties and chemical composition of Ruukki's steel pile RR170/10 S440J2H 1. Back ground information The statistical data of ...

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