Certificates

WYJ022-2005                   DIWA 353(13MnNiMo54)

1, scope: the rules apply to DIWA 353 (13 MnNiMo54) steel production and inspection (executive standard equivalent to ha pot DIWA 353 purchasing procedures).

2, supply condition: 890 ~ 950 ℃normalized 620 ~ 680 ℃tempering.

3, size, shape and allow deviation

Steel plate size and shape according to the relevant requirements EN10029 tolerance, which according to the thickness tolerance EN10029 grade B, straightness press N level.

4, the chemical composition of the steel plate should be consistent with the requirements of the table 1.

Table 1     chemical composition

（％）

 

	C	Si	Mn	P	S	Ni	Mo	Cr	Nb	Al
Melting analysis	≤0.20	0.10～0.50	1.00～1.60	≤0.020	≤0.010	0.60～1.00	0.20～0.40	0.20～0.40	0.005～0.020	≥0.015
Product analysis	≤0.22	0.05～0.56	0.95～1.70	≤0.025	≤0.010	0.55～1.05	0.15～0.44	0.15～0.45	0.001～0.025	≥0.015

5、mechanical proper

 Simulating  after welding the mechanical properties of the samples after heat treatment (horizontal) should meet the provisions of the table 2.

。

 

thicknese （mm）	yield strength σ0.2 （Mpa）	tensile strength σb（Mpa）	elongation δ5（%）	0℃AKV J	Room temperature impact180°d=3a
≤100	≥390	570～740	≥18	≥31	完好
＞100～120	≥380

Note: (1) listed in the table impact value for the average of the three specimens, allow a impact value less than rating, but they should not be below and J.

(2) simulation after welding heat treatment process: temperature: 580 ~ 610 ℃, holding time 7 hours. 300 ℃to 150 ℃than cooling speed up/hour, 300 ℃below are welcome.

6, steel plates normalizedand temperingstate of the tensile properties of high temperature should be consistent with the requirements in table 3.

Table 3  Tensile properties of high temperature

 

thick（mm）	Test temperature（℃）	σ0.2（Mpa）	σb（Mpa）
≤100	350	≥333	≥510
＞100～120		≥324