WELDING PROCEDURE SPECIFICATION (WPS)
Clause 5 — Prequalified — AWS D1.1:2020
WPS Number
WIQ-GMAW-70S6-SP-G2-001
Title
GMAW ER70S-6 (Spray) — CJP V-Groove 60° with Backing — Group II — Flat/Horizontal
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
1/4 in to unlimited
POSITION
Qualified Positions
1G, 2G
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
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 |
|---|
| Root | GMAW | ER70S-6 | 0.030 in | DCEP | 150-220 | 23-27 | 10-20 in/min | either |
| Root | GMAW | ER70S-6 | 0.035 in | DCEP | 200-320 | 25-30 | 10-20 in/min | either |
| 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 |
| Cap | GMAW | ER70S-6 | 0.030 in | DCEP | 150-220 | 23-27 | 10-20 in/min | either |
| Cap | GMAW | ER70S-6 | 0.035 in | DCEP | 200-320 | 25-30 | 10-20 in/min | either |
| Cap | 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 between passes. 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.
▸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 · Clause 5.5.1 (GMAW-S excluded) · Table 5.3 Group II · Table 5.4 (ER70S-6/A5.18) · Table 5.8 Cat B
Generated by WeldIQ™ · AWS D1.1:2020 · Prequalified per Clause 5 — Prequalified