WELDING PROCEDURE SPECIFICATION (WPS)
Clause 5 — Prequalified — AWS D1.1:2020
WPS Number
WIQ-FCAW-71T8-G2-001
Title
FCAW-S E71T-8 (Self-Shielded) — CJP V-Groove 60° with Backing — Group II — All Position
JOINT DESIGN
Code Reference
Figure 5.1 — B-U2a-GF
Backing
steel — A36, min 3/8 in × 1 in
DESIGNATION: B-U2a-GF
| DIMENSION | AS DETAILED | AS FIT-UP TOLERANCE | NOTES |
|---|
| Groove Angle (α) | 60° | +10°, −0° | Included angle |
| Root Opening (R) | 1/4 in | +1/16 in, −0 | At root after tacking |
| Root Face (f) | 0 to 1/8 in | Not limited | — |
| Backing Thickness | 3/8 in min | −0 | A36 steel |
| Backing Width | 1 in min | −0 | — |
| Base Metal Thickness (T) | Unlimited | — | — |
BASE METAL
Specifications
A36 (all thk), A53 Gr B, A500 Gr B/C, A501, A516 Gr 65/70, A529 Gr 50/55, A572 Gr 42, A572 Gr 50, A572 Gr 55, A588, A709 Gr 36, A709 Gr 50, A709 Gr 50S, A709 Gr 50W, A709 HPS50W, A710 Gr A, A913 Gr 50, A992, A1011 HSLAS Gr 50, A1018, A1085, API 5L X52, API 5L X60, API 5L X65, ABS Gr A/B/D/E
Thickness Range
3/16 in to unlimited
POSITION
Qualified Positions
1G, 2G, 3G, 4G
Vertical Progression
uphill
PREHEAT & INTERPASS TEMPERATURE
Minimum Preheat
32°F (≤3/4 in) / 50°F (>3/4–1-1/2 in) / 150°F (>1-1/2–2-1/2 in) / 300°F (>2-1/2 in)
Code Reference
Table 5.8, Category B
APPROVED FILLER METAL SIZES
Welder may use any size listed below. Each size has its own amperage/voltage range and position limit per Table 5.1.
| Size | Class | Amps | Volts | Position Limit | Notes |
|---|
| 0.035 in | E71T-8 | 100-175 | 17-21 | All | Any pass — DCEN |
| 0.045 in | E71T-8 | 125-225 | 17-22 | All | Any pass — DCEN |
| 0.068 in | E71T-8 | 150-300 | 18-24 | F/H only | Any pass — DCEN |
| 5/64 in | E71T-8 | 175-350 | 18-24 | F/H only | Any pass — DCEN |
WELDING PARAMETERS
| Pass | Process | Filler / Class | Size | Current | Amps | Volts | Speed | Technique |
|---|
| Root | FCAW-S | E71T-8 | 0.035 in | DCEP | 100-175 | 17-21 | 8-16 in/min | either / uphill |
| Root | FCAW-S | E71T-8 | 0.045 in | DCEP | 125-225 | 17-22 | 8-16 in/min | either / uphill |
| Root | FCAW-S | E71T-8 | 0.068 in | DCEP | 150-300 | 18-24 | 8-16 in/min | either / uphill |
| Root | FCAW-S | E71T-8 | 5/64 in | DCEP | 175-350 | 18-24 | 8-16 in/min | either / uphill |
| Fill | FCAW-S | E71T-8 | 0.035 in | DCEP | 100-175 | 17-21 | 8-16 in/min | either / uphill |
| Fill | FCAW-S | E71T-8 | 0.045 in | DCEP | 125-225 | 17-22 | 8-16 in/min | either / uphill |
| Fill | FCAW-S | E71T-8 | 0.068 in | DCEP | 150-300 | 18-24 | 8-16 in/min | either / uphill |
| Fill | FCAW-S | E71T-8 | 5/64 in | DCEP | 175-350 | 18-24 | 8-16 in/min | either / uphill |
| Cap | FCAW-S | E71T-8 | 0.035 in | DCEP | 100-175 | 17-21 | 8-16 in/min | either / uphill |
| Cap | FCAW-S | E71T-8 | 0.045 in | DCEP | 125-225 | 17-22 | 8-16 in/min | either / uphill |
| Cap | FCAW-S | E71T-8 | 0.068 in | DCEP | 150-300 | 18-24 | 8-16 in/min | either / uphill |
| Cap | FCAW-S | E71T-8 | 5/64 in | DCEP | 175-350 | 18-24 | 8-16 in/min | either / uphill |
PREQUALIFIED VARIABLE TOLERANCES (TABLE 5.2)
| VARIABLE | TOLERANCE | NOTES |
|---|
| Amperage (Current) | ± 10% | From values specified on WPS |
| Voltage | ± 15% | From values specified on WPS |
| Travel Speed | ± 25% | From values specified on WPS |
| Wire Feed Speed | ± 10% | GMAW, FCAW, SAW only |
TABLE 5.1 ADDITIONAL LIMITS
•Pass width at surface ≥ pass depth (width/depth rule)
•Vertical progression: uphill (except undercut repair with ≥70°F preheat)
•Power source: Constant Voltage (CV) required
TECHNIQUE
Cleaning
Wire brush/grind. Heavy slag — thorough removal required.
FIELD TIPS — WeldIQ
▸Self-shielded: NO external gas needed — ideal for windy field conditions. Do NOT add gas.
▸DCEN polarity (wire negative) — verify machine polarity before welding. Wrong polarity = bad welds.
▸Heavy slag — clean thoroughly between passes. Slag inclusions are the #1 defect with self-shielded wire.
▸Verify preheat with a temperature-indicating crayon (Tempilstik) or contact pyrometer. Check 3 inches from the weld on both sides.
CODE CITATIONS
D1.1:2020 Clause 5.2 · Table 5.3 Group II · Table 5.4 (E71T-8/A5.20) · Table 5.8 Cat B
Generated by WeldIQ™ · AWS D1.1:2020 · Prequalified per Clause 5 — Prequalified