Womic Stainless Steel Co., Ltd
Exceptional Resistance to Reducing and Oxidizing Acids: High molybdenum (15-17%) and chromium (14.5-16.5%) content provide outstanding resistance to both reducing acids (hydrochloric, sulfuric) and oxidizing acids (nitric, chromic), as well as mixed acids.
Superior Pitting and Crevice Corrosion Resistance: High molybdenum and tungsten (3-4.5%) content provide exceptional resistance to pitting and crevice corrosion in chloride-containing environments, with PRE (Pitting Resistance Equivalent) ≥ 65.
Outstanding Resistance to Wet Chlorine and Hypochlorite: Hastelloy C276 is the premier material for handling wet chlorine gas, chlorine dioxide, and hypochlorite solutions, where most other alloys fail rapidly.
Excellent Resistance to Sour Service (H₂S): Fully compliant with NACE MR0175/ISO 15156 for sour service applications with the highest allowable H₂S partial pressures and lowest pH values.
Exceptional Resistance to Stress Corrosion Cracking: High nickel content (≥57%) provides outstanding resistance to chloride-induced SCC, sulfide-induced SSCC, and polythionic acid SCC.
Low Carbon Content – No Sensitization: Low carbon content (≤0.010%) prevents carbide precipitation and eliminates sensitization, ensuring excellent weldability without post-weld heat treatment.
Surface Quality: Smooth internal and external surfaces available in annealed, pickled, or polished conditions for critical chemical service applications.
Mechanical Strength: High tensile and yield strength suitable for high-pressure chemical injection lines and critical process equipment.
Excellent Weldability: Offers excellent weldability with matching filler metals (ERNiCrMo-4). No preheat or post-weld heat treatment required.
International Certification: Tubes can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with NACE MR0175/ISO 15156, NORSOK M-650, and ASME Boiler & Pressure Vessel Code standards.
The Hastelloy C276 Superalloy Steel Tubes produced by Womic Steel conform to multiple international specifications used in chemical processing, pharmaceutical, and pressure applications:
|
Standard |
Description |
Equivalent Grade / Material Number |
|
ASTM B622 / ASME SB622 |
Seamless nickel and nickel alloy pipe and tube |
UNS N10276 (Hastelloy C276) |
|
ASTM B619 / ASME SB619 |
Welded nickel alloy pipe |
UNS N10276 |
|
ASTM B626 / ASME SB626 |
Welded nickel alloy tube |
UNS N10276 |
|
ASTM B574 |
Seamless nickel alloy pipe and tube |
UNS N10276 |
|
NACE MR0175 / ISO 15156 |
Sour service compliance |
Hastelloy C276 |
|
NORSOK M-650 |
Qualification of special materials |
Hastelloy C276 |
|
EN 10216-5 |
Seamless stainless steel tubes for pressure purposes |
2.4819 (NiMo16Cr15W) |
|
DIN 17751 |
Nickel alloy tubes |
NiMo16Cr15W |
|
ISO 6207 |
Nickel alloy seamless tubes |
NiMo16Cr15W |
These standards ensure that Hastelloy C276 Superalloy Steel Tubes meet global requirements for chemical composition, mechanical performance, testing, and dimensional accuracy.
Different specifications can be customized according to special requirements.
|
Execution Standard |
Main Standard |
Standard Grade |
|
ASTM (USA) |
ASTM B622, B619, B626, B574, B444 |
Hastelloy C276 (N10276), Inconel 625 (N06625), Inconel 718 (N07718), Inconel 600 (N06600), Inconel 825 (N08825) |
|
ASME (USA) |
SB622, SB619, SB626, SB444 |
Hastelloy C276, Inconel 625, Inconel 718, Inconel 600, Inconel 825 |
|
NACE (International) |
NACE MR0175 / ISO 15156 |
Hastelloy C276, Inconel 625, Inconel 718, Inconel 825 |
|
EN / DIN (Europe) |
EN 10216-5, EN 10217-7 |
2.4819 (Hastelloy C276), 2.4856 (Inconel 625), 2.4668 (Inconel 718), 2.4816 (Inconel 600), 2.4858 (Inconel 825) |
|
ISO (International) |
ISO 6207, ISO 13628-5 |
NiMo16Cr15W (2.4819), NiCr22Mo9Nb (2.4856) |
|
NORSOK (Norway) |
NORSOK M-650 |
Hastelloy C276, Inconel 625, Inconel 718 |
|
Element |
Ni |
Cr |
Mo |
W |
Fe |
C |
Mn |
P |
S |
Si |
V |
Co |
|
Hastelloy C276 |
≥57.0 |
14.5–16.5 |
15.0–17.0 |
3.0–4.5 |
4.0–7.0 |
≤0.010 |
≤1.0 |
≤0.025 |
≤0.010 |
≤0.08 |
≤0.35 |
≤2.5 |
Note: Hastelloy C276 (UNS N10276) is a nickel-chromium-molybdenum-tungsten alloy with the highest molybdenum content (15-17%) among commercial superalloy tube materials. The high molybdenum and tungsten content provide exceptional pitting resistance (PRE ≥ 65), the highest among all Womic Steel tube materials. The alloy exhibits excellent corrosion resistance in a wide range of aggressive chemicals, including hydrochloric acid, sulfuric acid, phosphoric acid, wet chlorine, hypochlorite, and mixed acids.
Comparison of PRE (Pitting Resistance Equivalent) Values:
|
Grade |
PRE |
Seawater Suitability |
Acid Suitability |
|
316/316L Stainless |
24-26 |
Limited |
Poor |
|
Duplex 2205 |
≥34 |
Good |
Fair |
|
Super Duplex 2507 |
≥42 |
Excellent |
Good |
|
Inconel 625 |
≥45 |
Outstanding |
Good |
|
Hastelloy C276 |
≥65 |
Outstanding |
Excellent |
Comparison with Other Superalloys:
|
Property |
Hastelloy C276 |
Inconel 625 |
Inconel 718 |
Alloy 825 |
|
Nickel (%) |
≥57 |
≥58 |
50-55 |
38-46 |
|
Molybdenum (%) |
15-17 |
8-10 |
2.8-3.3 |
2.5-3.5 |
|
Tungsten (%) |
3.0-4.5 |
— |
— |
— |
|
Hydrochloric Acid (HCl) |
Excellent |
Good |
Poor |
Fair |
|
Wet Chlorine (Cl₂) |
Excellent |
Poor |
Poor |
Poor |
|
Mixed Acids |
Excellent |
Fair |
Poor |
Fair |
|
Weldability |
Excellent |
Excellent |
Excellent |
Excellent |
The Hastelloy C276 Superalloy Steel Tube offers excellent strength and exceptional ductility, making it suitable for severe chemical service and high-pressure applications.
|
Property |
Unit |
Hastelloy C276 (Annealed) |
|
Tensile Strength (min) |
MPa |
≥690 |
|
Yield Strength (min) |
MPa |
≥310 |
|
Elongation (min) |
% |
≥40 |
|
Hardness (typical) |
HRC |
≤25 |
|
Density |
g/cm³ |
8.89 |
|
Melting Range |
°C |
1320–1370 |
|
Thermal Conductivity (20°C) |
W/m·K |
10.2 |
|
Coefficient of Thermal Expansion (20–100°C) |
μm/m·K |
11.2 |
|
Modulus of Elasticity (20°C) |
GPa |
205 |
High-Temperature Tensile Properties (Typical Values) :
|
Temperature (°C) |
Tensile Strength (MPa) |
Yield Strength (MPa) |
|
20 |
750–850 |
350–450 |
|
100 |
720–820 |
330–420 |
|
200 |
700–800 |
320–410 |
|
300 |
680–780 |
310–400 |
|
400 |
650–750 |
300–380 |
|
500 |
600–700 |
280–350 |
|
540 |
550–650 |
250–320 |
Maximum Recommended Service Temperatures:
|
Service Type |
Maximum Temperature |
|
Continuous Service (Corrosive Environment) |
400°C (752°F) |
|
Continuous Service (Non-Corrosive Environment) |
540°C (1000°F) |
|
Sour Service (NACE MR0175) |
232°C (450°F) |
|
Seawater Service |
50°C (122°F) |
|
Minimum Service Temperature |
-196°C (-321°F) |
Hastelloy C276 Superalloy Steel Tube – Heat Treatment Condition:
Hastelloy C276 tubes are solution annealed at 1120–1175°C followed by water quenching. This heat treatment:
1. Dissolves precipitated carbides and intermetallic phases.
2. Relieves internal stresses from cold drawing or cold pilgering.
3. Restores optimum corrosion resistance and ductility.
4. Ensures the alloy's exceptional resistance to corrosive attack.
5. Critical Note: Hastelloy C276 must be water quenched after solution annealing. Air cooling may result in precipitation of intermetallic phases (mu phase, P phase) that can reduce corrosion resistance. The low carbon content (≤0.010%) ensures that sensitization is not a concern.
Hastelloy C276 Superalloy Steel Tube – Delivery Condition:
Tubes are normally supplied in annealed and pickled condition, providing a clean, smooth surface and exceptional corrosion resistance. Upon request, polished finishes can be provided to meet specific chemical processing requirements.
Womic Steel adopts advanced production technology to ensure each Hastelloy C276 Superalloy Steel Tube meets exact specifications and flawless surface quality.
Raw Material Selection: High-quality Hastelloy C276 billets from certified premium mills (Haynes International, Special Metals, VDM Metals) with certified chemical composition and traceability. Material is VIM-VAR (Vacuum Induction Melted – Vacuum Arc Remelted) for optimal cleanliness.
Heating and Piercing: Billets heated to a carefully controlled temperature range (1150–1200°C) and pierced using a rotary piercing mill to form hollow shells.
Hot Rolling: Shells elongated and rolled to desired intermediate size with strict temperature control. High alloy content requires very careful reduction rates.
Cold Drawing / Cold Pilgering: Tubes refined to precise dimensions and improved surface finish. Multiple passes with intermediate annealing required due to very high work hardening rate.
Solution Annealing: Heat treatment at 1120–1175°C followed by immediate water quenching to dissolve carbides and restore properties.
Pickling & Passivation: Removal of oxides using specialized pickling acids optimized for high-molybdenum nickel alloys; thorough rinsing required.
Straightening and Dimensional Calibration: Ensures consistent roundness and wall uniformity.
Final Inspection & Marking: Each tube tested, marked with grade, heat number, standard, and tube dimensions before packing.
This process guarantees a smooth internal bore, high structural integrity, and exceptional corrosion resistance across all batches of Womic Steel’s Hastelloy C276 Superalloy Steel Tubes.
Womic Steel utilizes state-of-the-art manufacturing technology to ensure every Hastelloy C276 Welded Superalloy Steel Tube meets precise specifications and delivers excellent surface quality and performance.
Raw Material Selection: High-quality Hastelloy C276 strips/coils from certified premium mills with full traceability.
Slitting & Uncoiling: The steel coil is slit to the required width and uncoiled for feeding into the forming mill.
Forming & Welding: The strip is progressively formed into a cylindrical shape and the edges are welded together using advanced TIG or Plasma welding techniques with matching filler metal (ERNiCrMo-4) to create a solid weld seam.
Weld Seam Treatment: The external weld bead is removed to achieve a smooth surface, and the internal bead may be controlled or treated for bore cleanliness.
Solution Annealing: A full heat treatment process at 1120–1175°C followed by immediate water quenching is applied to dissolve carbides, restore corrosion resistance, and relieve stresses from welding and forming.
Sizing & Calibration: The tube is passed through a sizing mill to achieve the final precise outer diameter and roundness.
Straightening: The tube is straightened to ensure optimal linearity.
Pickling & Passivation: Chemical treatment removes scale and impurities, while promoting the formation of a protective passive oxide layer on the surface, including the weld zone.
Non-Destructive Testing (NDT) : The weld seam is inspected using methods like Eddy Current or Ultrasonic Testing to ensure integrity and quality.
Final Inspection & Marking: Each tube undergoes dimensional checks, visual inspection, and is marked with grade, heat number, and relevant standards before packaging.
This controlled process guarantees a consistent weld seam, excellent dimensional accuracy, and superior corrosion resistance for every batch of Womic Steel’s Hastelloy C276 Welded Superalloy Steel Tubes.
Outside Diameter: 6.0mm – 152mm (1/4″ – 6″)
Wall Thickness: 0.5mm – 12.7mm (0.020″ – 0.500″)
Length: Up to 15m (straight lengths)
OD Tolerances:
Standard: ±0.10mm
Precision: ±0.05mm (upon request)
Wall Thickness Tolerances：
Standard: ±10% of nominal
Precision: ±8% of nominal (upon request)
Straightness: 0.5mm per 1000mm length typical
|
ANSI B 36.19/ANSI B36.10 DIMENSIONS OF SEAMLESS &WELDED STAINLESS STEEL PIPE |
|||||||||||||||||||
|
Nominalsize |
mm |
ANSIB36.19 |
ANSIB36.10ANSIB36.10 |
||||||||||||||||
|
DN |
NPS |
mm |
5S |
10S |
40S |
80S |
10 |
20 |
30 |
STD |
40 |
60 |
XS |
80 |
100 |
120 |
140 |
160XXS |
|
|
6 |
1/8" |
10.29 |
|
1.24 |
1.73 |
2.41 |
|
|
|
1.73 |
1.73 |
|
2.41 |
2.41 |
|
|
|
|
|
|
8 |
1/4" |
13.72 |
|
1.65 |
2.24 |
3.02 |
|
|
|
2.24 |
2.24 |
|
3.02 |
3.02 |
|
|
|
|
|
|
10 |
3/8" |
17.15 |
|
1.65 |
2.31 |
3.20 |
|
|
|
2.31 |
2.31 |
|
3.20 |
3.20 |
|
|
|
|
|
|
15 |
1/2" |
21.34 |
1.65 |
2.11 |
2.77 |
3.73 |
|
|
|
2.77 |
2.77 |
|
3.73 |
3.73 |
|
|
|
4.78 |
7.47 |
|
20 |
3/4" |
26.67 |
1.65 |
2.11 |
2.87 |
3.91 |
|
|
|
2.87 |
2.87 |
|
3.91 |
3.91 |
|
|
|
5.56 |
7.82 |
|
25 |
1" |
33.4 |
1.65 |
2.77 |
3.38 |
4.55 |
|
|
|
3.38 |
3.38 |
|
4.55 |
4.55 |
|
|
|
6.35 |
9.09 |
|
32 |
1 1/4" |
42.16 |
1.65 |
2.77 |
3.56 |
4.85 |
|
|
|
3.56 |
3.56 |
|
4.85 |
4.85 |
|
|
|
6.35 |
9.70 |
|
40 |
1 1/2" |
48.26 |
1.65 |
2.77 |
3.68 |
5.08 |
|
|
|
3.68 |
3.68 |
|
5.08 |
5.08 |
|
|
|
7.14 |
10.16 |
|
50 |
2" |
60.33 |
1.65 |
2.77 |
3.91 |
5.54 |
|
|
|
3.91 |
3.91 |
|
5.54 |
5.54 |
|
|
|
8.74 |
11.07 |
|
65 |
2 1/2" |
73.03 |
2.11 |
3.05 |
5.16 |
7.01 |
|
|
|
5.16 |
5.16 |
|
7.01 |
7.01 |
|
|
|
9.52 |
14.02 |
|
80 |
3" |
88.9 |
2.11 |
3.05 |
5.49 |
7.62 |
|
|
|
5.49 |
5.49 |
|
7.62 |
7.62 |
|
|
|
11.13 |
15.24 |
|
90 |
3 1/2" |
101.6 |
2.11 |
3.05 |
5.74 |
8.08 |
|
|
|
5.74 |
5.74 |
|
8.08 |
8.08 |
|
|
|
|
|
|
100 |
4" |
114.3 |
2.11 |
3.05 |
6.02 |
8.56 |
|
|
|
6.02 |
6.02 |
|
8.56 |
8.56 |
|
11.13 |
|
13.50 |
17.12 |
|
125 |
5” |
141.3 |
2.77 |
3.40 |
6.55 |
9.52 |
|
|
|
6.55 |
6.55 |
|
9.52 |
9.52 |
|
12.70 |
|
15.90 |
19.05 |
|
150 |
6" |
168.28 |
2.77 |
3.40 |
7.11 |
10.97 |
|
|
|
7.11 |
7.11 |
|
10.97 |
10.97 |
|
14.30 |
|
18.20 |
21.95 |
|
200 |
8" |
219.08 |
2.77 |
3.76 |
8.18 |
12.70 |
|
6.35 |
7.04 |
8.18 |
8.18 |
10.30 |
12.70 |
12.70 |
15.10 |
18.20 |
20.60 |
23.00 |
22.22 |
|
250 |
10" |
273.05 |
3.40 |
4.19 |
9.27 |
12.70 |
|
6.35 |
7.80 |
9.27 |
9.27 |
12.70 |
12.70 |
15.09 |
18.26 |
21.44 |
25.40 |
28.58 |
|
|
300 |
12" |
323.85 |
3.96 |
4.57 |
9.52 |
12.70 |
|
6.35 |
8.38 |
9.52 |
10.31 |
14.27 |
12.70 |
17.48 |
21.44 |
25.40 |
28.58 |
33.32 |
|
|
350 |
14" |
355.6 |
3.98 |
4.78 |
|
|
6.35 |
7.92 |
9.52 |
9.52 |
11.13 |
15.09 |
12.70 |
19.05 |
23.83 |
27.79 |
31.75 |
35.71 |
|
|
400 |
16" |
406.4 |
4.19 |
4.78 |
|
|
6.35 |
7.92 |
9.52 |
9.52 |
12.70 |
16.66 |
12.70 |
21.44 |
26.19 |
30.96 |
36.53 |
40.49 |
|
|
450 |
18" |
459.2 |
4.19 |
4.78 |
|
|
6.35 |
7.92 |
11.13 |
9.52 |
14.27 |
19.05 |
12.70 |
23.83 |
29.36 |
34.92 |
39.67 |
45.24 |
|
|
500 |
20" |
508 |
4.77 |
5.53 |
|
|
6.35 |
9.52 |
12.70 |
9.52 |
15.09 |
20.62 |
12.70 |
26.19 |
32.54 |
38.10 |
44.45 |
50.01 |
|
|
550 |
22" |
558.8 |
4.77 |
5.53 |
|
|
6.35 |
9.52 |
12.70 |
9.52 |
15.87 |
22.22 |
12.70 |
28.57 |
34.92 |
41.27 |
47.62 |
53.97 |
|
|
600 |
24" |
609.6 |
5.54 |
6.35 |
|
|
6.35 |
9.52 |
14.70 |
9.52 |
17.48 |
24.61 |
12.70 |
30.96 |
38.89 |
46.02 |
52.37 |
59.94 |
|
|
650 |
26" |
660.4 |
|
|
|
|
7.92 |
12.70 |
|
9.52 |
|
|
12.70 |
|
|
|
|
|
|
|
700 |
28" |
711.2 |
|
|
|
|
7.92 |
12.70 |
15.88 |
9.52 |
|
|
12.70 |
|
|
|
|
|
|
|
750 |
30" |
762 |
6.35 |
7.92 |
|
|
7.92 |
12.70 |
15.88 |
9.52 |
|
|
12.70 |
|
|
|
|
|
|
|
800 |
32" |
812.8 |
|
|
|
|
7.92 |
12.70 |
15.88 |
9.52 |
|
|
12.70 |
|
|
|
|
|
|
Womic Steel offers a wide range of surface finishes to meet various chemical processing, pharmaceutical, and critical service applications.
|
Surface Type |
Description |
|
Annealed & Pickled (AP Finish) |
Standard industrial finish – matte, oxide-free after acid treatment. Suitable for most chemical processing applications. |
|
Bright Annealed (BA Finish) |
Mirror-like surface obtained through controlled atmosphere annealing. |
|
Polished Finish (180#, 240#, 320#, 400#) |
Smooth mechanical finish suitable for high-purity and pharmaceutical applications. |
|
Passivated Finish |
Surface chemically treated to enhance corrosion protection. |
|
Electropolished Finish |
Extremely clean, smooth, and hygienic finish ideal for pharmaceutical and high-purity applications. |
Each Hastelloy C276 Superalloy Steel Tube surface is inspected for uniform appearance, absence of pits, and consistent finish quality.
Every Hastelloy C276 Superalloy Steel Tube undergoes comprehensive inspection in accordance with ASTM, NACE, and NORSOK standards to guarantee reliability and performance:
|
Test / Inspection |
Description |
Applicability |
|
Visual & Dimensional Inspection |
Surface, roundness, and thickness checked. |
100% |
|
Hydrostatic Pressure Test |
100% tested for leakage and pressure resistance. |
100% |
|
Eddy Current Test (ECT) |
Detects surface and sub-surface imperfections. |
100% |
|
Ultrasonic Test (UT) |
Ensures internal integrity of the seamless structure. |
Upon request |
|
Positive Material Identification (PMI) |
Confirms correct chemical grade (Ni, Cr, Mo, W verification). |
100% (per heat) |
|
Intergranular Corrosion Test (IGC) |
ASTM G28 – validates resistance to intergranular corrosion. |
Per heat / batch |
|
Pitting Corrosion Test |
ASTM G48 – ferric chloride pitting test. |
Per heat / batch |
|
Flattening & Flaring Tests |
Evaluate ductility and deformation capability. |
Per heat / batch |
|
Hardness & Tensile Testing |
Confirms mechanical compliance with ASTM standards. |
Per heat / batch |
|
Sour Service Qualification |
NACE MR0175/ISO 15156 compliance – HIC/SSC testing. |
Per project |
|
Surface Roughness and Cleanliness Check |
For polished or pharmaceutical tubes. |
Upon request |
|
Third-Party Inspection (SGS / BV / DNV / TUV) |
Available upon customer request. |
Upon request |
These extensive tests ensure that every Hastelloy C276 Superalloy Steel Tube from Womic Steel meets the highest international standards for reliability and longevity.
Hastelloy C276 Superalloy Steel Tube is ideal for the most severe corrosive environments, offering long service life in demanding conditions:
|
Industry |
Typical Applications |
|
Chemical Processing |
Hydrochloric acid (HCl) coolers and heaters, sulfuric acid heat exchangers, mixed acid (HNO₃/HCl) service, acetic acid reactors, chlor-alkali heat exchangers, vinyl chloride monomer (VCM) heat exchangers, chemical injection lines. |
|
Pharmaceutical |
High-purity process lines, API (Active Pharmaceutical Ingredient) reactors, sterile transfer lines, clean steam systems, aggressive chemical handling. |
|
Wet Chlorine Service |
Chlorine gas coolers and heaters, chlorine dioxide heat exchangers, hypochlorite coolers, chlorinated hydrocarbon processing, bleaching systems. |
|
Flue Gas Desulfurization (FGD) |
Reheaters, gas-gas heaters (GGH), slurry heat exchangers, absorber coolers – in high-chloride, low-pH environments. |
|
Oil & Gas (Severe Sour Service) |
Sour gas coolers, H₂S-containing heat exchangers, produced water coolers – where H₂S partial pressures and chloride levels are extreme (NACE MR0175 compliant). |
|
Offshore & Subsea |
Chemical injection lines, hydraulic control lines, umbilical tubes for subsea production systems (NORSOK M-650 compliant, ship classification certifications available from ABS, BV, DNV, LR, GL, RINA, CCS, KR, NK). |
|
Power Generation |
FGD reheaters, scrubber heat exchangers, condenser tubes (aggressive cooling water), nuclear waste heat exchangers. |
|
Pulp & Paper |
Bleach plant heat exchangers (chlorine dioxide, hypochlorite), black liquor evaporators, digester heat exchangers. |
|
Waste Incineration |
Flue gas heat exchangers, acid gas condensers, scrubber reheaters – for high-chlorine, high-acid flue gases. |
|
Hydrometallurgy |
Pressure acid leaching (PAL) heat exchangers, high-temperature solvent extraction, electrowinning solution coolers. |
|
Semiconductor Manufacturing |
High-purity gas lines, chemical delivery systems, wet processing equipment. |
Each Hastelloy C276 Superalloy Steel Tube is securely packed and clearly labeled to ensure safe and efficient transport worldwide.
General packaging for
local truck transport:
Bundle packing with woven fabric, iron strip bundle, plastic cap on two ends.
Hexagonal packaging:
Bundle packing with woven fabric, iron strip bundle, plastic cap on two ends.
Packaging for
chemical processing tubes:
Wooden crate with foam padding, individual tube separation, plastic end caps
for export sea-worthy transport.
General packaging for
products to be exported:
Wooden box for export sea-worthy transport.
Packaging for
high-purity and pharmaceutical tubes:
Individual wrapping, foam padding, wooden crate with moisture barrier.
Direct cooperation with global shipowners ensures the most competitive freight rates.
Professional loading and securing teams guarantee damage-free shipment.
Efficient document preparation (EN 10204 3.1/3.2 certificates, MTR, NACE compliance certificates, NORSOK documentation), minimizing customs delays.
Rapid delivery time — select sizes kept in ready stock.
Continuous cargo tracking and after-sales follow-up to ensure smooth arrival at destination.
Womic Steel is a trusted manufacturer and exporter specializing in Hastelloy C276 Superalloy Steel Tubes, committed to delivering premium quality and professional service for the most demanding corrosive environments.
Strict quality control under ISO 9001, PED, and ASME certification.
Highest corrosion resistance – PRE ≥65, the highest among all Womic Steel tube materials.
Sour service qualified – NACE MR0175 / ISO 15156 compliant.
NORSOK M-650 compliant – for offshore and subsea applications.
Modern production lines and experienced technicians.
Complete testing, inspection, and documentation support.
Flexible customization and surface finishing options.
Fast production cycle and reliable global shipping.
Premium mill relationships – direct sourcing from Haynes International, Special Metals, VDM Metals.
Full traceability – from melt to final tube, complete certification package.
No post-weld heat treatment required – extremely low carbon content (≤0.010%) eliminates PWHT requirements.
