OK B2 SC

OK B2 SC is a basic AC/DC stick electrode designed for welding creep‑resistant low‑alloy steels (1.25 % Cr, 0.5 % Mo) such as SA‑387 Grade 11, SA‑182 Grade 11, and SA‑335 Grade P11 where high toughness after post‑weld heat treatment is required.

Key Features

• Basic covering suitable for AC + DC welding
• Very low impurity levels (X‑bar max. 10) for temper‑embrittlement resistance
• Can be used straight from VacPac™ hermetically sealed packaging
• Ideal for refinery, petrochemical, chemical, power generation, and pressure‑vessel applications

Specifications

• Classifications: SFA/AWS A5.5 E8018‑B2‑H4R, EN ISO 3580‑A E CrMo1B 42 H5
• Approvals: CE EN 13749, VdTÜV 19549
• Welding Current: DC +/‑, AC
• Diffusible Hydrogen: < 4.0 ml/100 g
• Alloy Type: Low alloyed (1.25 % Cr, 0.5 % Mo)
• Coating Type: Basic covering
• Min AC OCV: 65 V
• Deposition Data (example size 4.0 × 350 mm): 120‑190 A, 22 V, 63 % efficiency, 77 s per electrode, 1.6 kg/h

Applications

• Welding of creep‑resistant low‑alloy steels in refinery and petrochemical plants
• Fabrication of pressure vessels and power‑generation components
• Situations requiring post‑weld heat treatment for maximum toughness