Description
1.25 Cr-0.5 Mo Steels
SFA 5.5/AWS E 8018-B2
BS 2493 | CrMoBH DIN 8575 E CrMo1B26 IS 1395 E 55B-B2-2-6Fe EN 1599 E CrMo1B42 H5 Identification: Name Printed.
Hydrogen controlled iron powder type electrode designed for depositing weld metal of 1.25 Cr-0.5 Mo steel with good creep resistance at service temperatures upto 550°C. In addition, it displays good resistance to corrosion in heated steam and to corrosion in processing high sulphur crude oil up to 450°C.
CHEMICAL ANALYSIS OF ALL WELD DEPOSIT (%)
| C | Mn | Si | Cr | Mo | S | P |
| 0.05-0.10 | 0.50-0.90 | 0.50 max | 1.0-1.50 | 0.40-0.65 | 0.025 max | 0.025 max |
ALL WELD MECHANICAL PROPERTIES
| PWHT | UTS ( Mpa ) | 0.2 % Proof Stress ( Mpa ) | % Elongation ( L = 4d ) | CVN impact Energy ( 1 ) ( + 20 ° C ) |
| 690 / 1hr | 580-720 | 500-600 | 22-27 | 100-140 |
| 690 " C / 9 hr | 560 min | 460 min | 24-29 |
Hardness: 250 BHN (as welded) 215 BHN max after PWHT at 690° 10° C for 3 hrs. Hydrogen in weld metal: 5 ml/100g. max. (Mercury method) Moisture content < 0.20% WELDING CURRENT RANGES FOR SIZES MANUFACTURED Use DC+ or AC (70 V Min)
| Dia ( mm ) | 2.5 | 3.15 | 4 | 5 | 6.3 |
| Length ( mm ) | 350 | 450 | 450 | 450 | 450 |
| Current ( Amp ) | 70-100 | 100-140 | 140-180 | 180-240 | 250-320 |
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