DIPTI METAL INDUSTRIES
Leading ASTM A403 Stainless Steel Pipe Fittings Manufacturer, Stockist & Exporter
Dipti Metal Industries (A KMR Group Company) is the global authority and premier ASTM A403 Manufacturer based in Mumbai, India. Under our Dipti® brand, we produce and stock the entire spectrum of ASTM A403 austenitic stainless steel buttweld fittings. From standard grades like WP304/L and WP316/L to high-performance alloys like XM-19, WP904L, and 20CB, our products serve mission-critical petrochemical, desalination, and nuclear projects in 60+ countries. All fittings comply with ASME B16.9 and MSS SP-43 standards, ensuring 100% reliability for pressure piping applications.
🏭 Comprehensive ASTM A403 Solutions in Mumbai
As a leading ASTM A403 Supplier, we provide both WP-S (Seamless) and WP-W (Welded) construction types. ASTM A403 fittings are defined by their excellent corrosion resistance, weldability, and impact strength at both cryogenic and high temperatures. Whether you require a standard 90° Elbow or a custom 10D Bend, Dipti Metal ensures mill-certified quality and zero-failure performance.
Grade Families We Stock
- Standard: WP304/L/H, WP316/L/H
- Stabilized: WP321/H, WP347/H
- High-Alloy: WP317/L, WP904L, WP310S, WP309
- Super Austenitic: XM-19, 6XN, 254SMO (S31254)
- Specialty: 20CB (Alloy 20), 1925N, S38815
Testing & Certification
- 100% Radiography (RT) for WP-WX classes
- 100% Ultrasonic Testing (UT) for WP-WU classes
- PMI, Corrosion Testing (G48), and IGC testing
- Compliant with NACE MR0175 / ISO 15156
- Third-party Inspection: BV, TUV, LR, SGS, DNV
🧪 ASTM A403 Complete Chemical Composition (All Grades)
Chemical requirements for wrought austenitic stainless steel fittings. Scroll horizontally to view all elements.
| Grade WP | UNS | C % | Mn % | P % | S % | Si % | Ni % | Cr % | Mo % | N % | Others / Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| WP304 | S30400 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 8.0–11.0 | 18.0–20.0 | … | … | … |
| WP304L | S30403 | 0.030E | 2.00 | 0.045 | 0.030 | 1.00 | 8.0–12.0 | 18.0–20.0 | … | … | … |
| WP304H | S30409 | 0.04–0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 8.0–11.0 | 18.0–20.0 | … | … | … |
| WP316 | S31600 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 10.0–14.0 | 16.0–18.0 | 2.0–3.0 | … | … |
| WP316L | S31603 | 0.030E | 2.00 | 0.045 | 0.030 | 1.00 | 10.0–14.0F | 16.0–18.0 | 2.0–3.0 | … | … |
| WP321 | S32100 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 9.0–12.0 | 17.0–19.0 | … | … | Ti = 5×(C+N) min – 0.70 max |
| WP321H | S32109 | 0.04–0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 9.0–12.0 | 17.0–19.0 | … | … | Ti = 4×(C+N) min – 0.70 max |
| WP347 | S34700 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 9.0–12.0 | 17.0–19.0 | … | … | Nb (Cb) ≥ 10×C; 1.10 max |
| WP347H | S34709 | 0.04–0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 9.0–12.0 | 17.0–19.0 | … | … | Nb (Cb) ≥ 8×C; 1.10 max |
| WP904L | N08904 | 0.020 | 2.00 | 0.045 | 0.035 | 1.00 | 23.0–28.0 | 19.0–23.0 | 4.0–5.0 | 0.10 | Cu 1.0–2.0 |
| WPXM-19 | S20910 | 0.06 | 4.0–6.0 | 0.045 | 0.030 | 1.00 | 11.5–13.5 | 20.5–23.5 | 1.5–3.0 | 0.2–0.4 | Cb 0.1–0.3; V 0.1–0.3 |
| WP20CB | N08020 | 0.07 | 2.00 | 0.045 | 0.035 | 1.00 | 32.0–38.0 | 19.0–21.0 | 2.0–3.0 | … | Cu 3.0–4.0; Cb ≥ 8×C |
| WP6XN | N08367 | 0.030 | 2.00 | 0.040 | 0.030 | 1.00 | 23.5–25.5 | 20.0–22.0 | 6.0–7.0 | 0.18–0.25 | Cu 0.75 |
| WPNIC | N08800 | 0.10 | 1.50 | 0.045 | 0.015 | 1.00 | 30.0–35.0 | 19.0–23.0 | … | 0.15–0.60 | Al 0.15–0.6; Fe 39.5 min |
| WPS31254 | S31254 | 0.020 | 1.00 | 0.030 | 0.010 | 0.80 | 17.5–18.5 | 19.5–20.5 | 6.0–6.5 | 0.18–0.25 | Cu 0.50–1.00 |
| WPS38815 | S38815 | 0.030 | 2.00 | 0.040 | 0.020 | 5.5–6.5 | 15.0–17.0 | 13.0–15.0 | 0.75–1.50 | … | Cu 0.75–1.50; Al 0.30 |
E — For small diameter or thin wall (less than 0.500 in. OD), carbon max of 0.040% is allowed for L grades.
F — On pierced tubing, Nickel may be between 11.0–16.0%.
... — Ellipsis indicates no requirement for the element.
ASTM A403 Product Types & ASME Standards
- ASTM A403 90°/45° Elbows (LR/SR)
- ASTM A403 180° Return Bends
- ASTM A403 Equal & Reducing Tees
- ASTM A403 Concentric & Eccentric Reducers
- ASTM A403 End Caps & Dish Ends
- ASTM A403 Stub Ends (Short/Long Pattern)
- ASTM A403 45° Laterals & Crosses
- Custom Induction Bends (2D–10D)
Global Export of ASTM A403 Fittings (60+ Countries)
We provide Door-to-Port delivery for certified WP304/316/321/347 fittings to industrial hubs worldwide.
UAE (Dubai, Abu Dhabi), Saudi Arabia (Riyadh, Dammam), Oman (Muscat), Qatar (Doha), Kuwait, Bahrain.
USA (Houston), Canada (Calgary), Europe (UK, Germany, France), Asia (Singapore, Malaysia, South Korea), Africa (Nigeria, South Africa, Egypt), Oceania (Australia, New Zealand).
Inquire for ASTM A403 Fittings
📍 Contact Dipti Metal Industries
Dipti Metal Industries (KMR Group)
No.9, Shreepati Castle, D-1, 10–11th Khetwadi Back Road, Mumbai – 400004, India
Sales: +91-22-66381301
WhatsApp: +91-9975266499
Email: info@diptimetal.com