Description:
J107Cr is a low hydrogen sodium type low alloy high strength steel electrodes, using DC reverse, can be all-position welding.
use:
Suitable for welding tensile strength greater than 980N / mm 2 high-strength low-alloy steel stage. Such as 30CrMnSi, 35CrMo and so on.
Deposited metal chemical composition (%)
C | Mn | Si | S | P | Cr | Mo | V | |
guarantee value | ≤0.15 | ≥1.00 | ≤0.70 | ≤0.035 | ≤0.035 | 1.50 ~ 2.20 | 0.40 ~ 0.80 | 0.08 ~ 0.16 |
Example value | 0.067 | 1.32 | 0.32 | 0.005 | 0.017 | 2.10 | 0.72 | 0.12 |
Deposited metal mechanical properties (620 ℃ × 1h)
Pilot projects | Rm (N / mm 2 ) | ReL / Rp 0.2 (N / mm 2 ) | A (%) | KV 2 (J) |
Room temperature | ||||
guarantee value | ≥980 | ≥880 | ≥12 | - |
Example value | 1090 | 960 | 14 | 50 |
Deposited metal diffusion hydrogen content: ≤ 5.0ml / 100g (chromatography or mercury method)
X-ray detection:
I level
Reference current (DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 80 ~ 130 | 130 ~ 180 | 160 ~ 200 |
Precautions:
1. Before welding electrode to be 400 ℃ baking 1h, placed in 100 ~ 150 ℃ incubator, with the use of take.
2. Weldment must remove rust and dirt, weldment preheated to about 300 ℃.
3. Weld after welding should be quenched and tempered, the 880 ℃ oil quenching and 520 ℃ tempering air-cooled to eliminate the residual stress of weldment and to promote the homogenization of the organization.
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