WELDING PROCEDURE SPECIFICATION (WPS)
Clause 5 — Prequalified — AWS D1.1:2020
WPS Number
WIQ-PQ-GMAW-124
Title
GMAW ER70S-6 (Spray) — Fillet-T Joint — Group I — Flat/Horizontal
JOINT DESIGN
Code Reference
Figure 5.3 / Table 7.7
DESIGNATION: Fillet — T-Joint
| DIMENSION | AS DETAILED | AS FIT-UP TOLERANCE | NOTES |
|---|
| Fillet Size (min per Table 7.7) | Per thicker part | −0 | — |
| T ≤ 1/4 in | 1/8 in min | −0 | — |
| T = 1/4 to 1/2 in | 3/16 in min | −0 | — |
| T = 1/2 to 3/4 in | 1/4 in min | −0 | — |
| T > 3/4 in | 5/16 in min | −0 | — |
| Root Opening (gap) | 0 | max 3/16 in | If >1/16 in, increase leg by gap |
| Dihedral Angle (Ψ) | 90° | 60° to 135° | — |
BASE METAL
Specifications
A36 (≤3/4 in), A53 Gr B, A500 Gr B, A500 Gr C, A501 Gr A, A516 Gr 55, A516 Gr 60, A516 Gr 65, A516 Gr 70, A524 Gr I/II, API 5L Gr B, API 5L X42
Thickness Range
1/4 in to 3/4 in
POSITION
Qualified Positions
1F, 2F
PREHEAT & INTERPASS TEMPERATURE
Minimum Preheat
32°F (≤3/4 in)
Code Reference
Table 5.8, Category B
SHIELDING
Gas Type
75% Ar / 25% CO2 (min)
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 |
|---|
| 0.030 in | ER70S-6 | 150-220 | 23-27 | F/H | Spray transfer |
| 0.035 in | ER70S-6 | 200-320 | 25-30 | F/H | Spray transfer |
| 0.045 in | ER70S-6 | 260-400 | 27-33 | F/H | Spray transfer |
WELDING PARAMETERS
| Pass | Process | Filler / Class | Size | Current | Amps | Volts | Speed | Technique |
|---|
| Single/Root | GMAW | ER70S-6 | 0.030 in | DCEP | 150-220 | 23-27 | 10-20 in/min | either |
| Single/Root | GMAW | ER70S-6 | 0.035 in | DCEP | 200-320 | 25-30 | 10-20 in/min | either |
| Single/Root | GMAW | ER70S-6 | 0.045 in | DCEP | 260-400 | 27-33 | 10-20 in/min | either |
| Fill | GMAW | ER70S-6 | 0.030 in | DCEP | 150-220 | 23-27 | 10-20 in/min | either |
| Fill | GMAW | ER70S-6 | 0.035 in | DCEP | 200-320 | 25-30 | 10-20 in/min | either |
| Fill | GMAW | ER70S-6 | 0.045 in | DCEP | 260-400 | 27-33 | 10-20 in/min | either |
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. Minimal spatter with spray.
FIELD TIPS — WeldIQ
▸GMAW-S (short circuit) is NOT prequalified under D1.1. Only spray and pulse transfer are prequalified.
▸Spray transfer: minimum amperage threshold must be exceeded or you'll get globular transfer. Check transition current for wire size.
▸Aim at the root of the joint (corner). Most common fillet defect is incomplete fusion at the root due to wrong gun angle.
▸For multipass fillets: first pass tight into root (45°), subsequent passes stacked with slight overlap. Each pass fuses both legs.
▸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 I · Table 5.4 (ER70S-6) · Table 7.7 · Table 5.8 Cat B
Generated by WeldIQ™ · AWS D1.1:2020 · Prequalified per Clause 5 — Prequalified