SS 904L Valves Manufacturer, Supplier & Exporter

Industrial ASME B16.34 grade SS 904L stainless steel valves ready for dispatch from stock

Technical Product Details

Material Grade	High-Nickel Super Austenitic Stainless Steel 904L (UNS N08904 / Werkstoff 1.4539)
Governing Specifications	ASME B16.34, ASME B16.10, ASME B16.5, ASME B16.25, API 600 / BS 1414, API 598 / BS EN 12266-1, ASTM B649, ASTM A182 F904L, ASTM A351 CK3MCuN
Supply Configurations	Cast Body Valves, Forged Body Valves, Flanged Ends, Socket Weld (SW), Dual Ferrule Tube Connections, NPT/BSPT Threaded Ends
Dimensional Scope	Size Range: 1/8" to 14" (Custom sizes available on request) \| Pressure Ratings: Class 150#, 300#, 600#, 800#, 1500# (Up to 6000 PSIG for instrument valves)
In-House Quality Verification	PMI spectro testing, chemical analysis, Vernier/micrometer dimensional checks, API 598 hydro/pneumatic testing, hardness testing, and Ultrasonic Testing (UT)

Table of Contents

SS 904L Valves Overview
Technical Specifications
Types of SS 904L Valves Available
Pressure-Temperature Performance Parameters
Key Advantages of SS 904L Valves
Key Industrial Applications
Chemical Composition & Mechanical Properties
Global Supply & Export Network
Frequently Asked Questions
Get a Quote for SS 904L Valves

SS 904L Valves Overview

Nirvaan Overseas is a premier SS 904L Valves Manufacturer in India, precision-engineering high-alloy cast and forged valve assemblies for aggressive chemical service. Formulated with 1.0–2.0% Copper and 23–28% Nickel, Grade 904L provides extraordinary immunity to warm sulfuric acid environments across Class 150# to 1500# systems.

As a leading Stainless Steel 904L Valves Manufacturer in India, every valve body undergoes 100% API 598 hydrostatic shell and seat pressure testing to ensure zero-leakage performance in severe acid handling loops. All valve dispatches are supplied with full EN 10204 3.1 MTCs, heat traceability, and third-party inspection documentation.

Operating as a globally active SS 904L Valves Exporter, we regularly deliver fully certified valve packages across key process markets in Saudi Arabia, UAE, Qatar, Oman, Kuwait, Germany, Italy, Singapore, Malaysia, and the United States.

Technical Specifications

Parameter	Technical Details
Standards	ASME B16.34, ASME B16.10, ASME B16.5, ASME B16.25, API 600/BS 1414, API 598/BS EN 12266-1
Material Grades	ASTM A351 Grade CK3MCuN (Cast), ASTM A182 / B649 Grade UNS N08904 / F904L (Forged)
Pressure Class	Class 150#, 300#, 600#, 800#, 1500# (Up to 6000 PSIG working pressure)
Size Range	1/8" to 14" (DN15 to DN350)
End Connections	Socket Weld (SW), Dual Ferrule Tube, Male/Female NPT, BSPT, Flanged Ends (RF, RTJ)
Temperature Ratings	PTFE Seat: Up to 450°F (232°C) \| Grafoil Packing: Up to 700°F (371°C)
Testing Compliance	API 598, BS EN 12266-1, ISO 5208

Types of SS 904L Valves Available

SS 316 Ball Valves

SS 316 Globe Valves

SS 316 Check Valves

SS 316 Needle Valves

SS 316 Butterfly Valves

SS 904L Ball Valves: Designed with quarter-turn full-port action and cavity-filled seats for bubble-tight isolation in concentrated sulfuric acid and phosphoric acid lines.
SS 904L Globe Valves: Features heavy-pattern stems and parabolic discs to deliver precise flow control under high differential pressures in aggressive chemical media.
SS 904L Check Valves: Automatically prevents reverse flow contamination using swing or lift check designs optimized for severe chloride and acid handling processes.
SS 904L Needle Valves: Built with fine-pitch stems and dual ferrule connections for high-pressure micro-metering up to 6000 PSIG in instrument lines.
SS 904L Butterfly Valves: Offers high-flow, low-weight throttling performance in large-diameter piping loops handling acidic cooling water and slurries.

Pressure-Temperature Performance Parameters

Designed strictly to ASME B16.34 standards, our Grade 904L valve bodies maintain exceptional structural integrity and pressure containment across elevated temperature ranges:

Pressure Class	Max Working Pressure at 38°C (100°F)	Max Working Pressure at 200°C (392°F)	Max Working Pressure at 400°C (752°F)
Class 150#	290 PSI (20.0 Bar)	225 PSI (15.5 Bar)	150 PSI (10.3 Bar)
Class 300#	750 PSI (51.7 Bar)	650 PSI (44.8 Bar)	515 PSI (35.5 Bar)
Class 600#	1500 PSI (103.4 Bar)	1300 PSI (89.6 Bar)	1030 PSI (71.0 Bar)
Class 800# (Forged)	1920 PSI (132.4 Bar)	1680 PSI (115.8 Bar)	1350 PSI (93.1 Bar)
Class 1500#	3750 PSI (258.6 Bar)	3250 PSI (224.1 Bar)	2575 PSI (177.5 Bar)

Key Advantages of SS 904L Valves

Sulfuric Acid Resistance: Specific addition of 1.0–2.0% Copper provides rare immunity to full-concentration sulfuric acid up to 35°C.
Stress Corrosion Cracking Immunity: High Nickel concentration (23–28%) prevents transgranular stress-corrosion cracking in hot chloride environments.
Resistance to Crevice Corrosion: High Molybdenum (4.0–5.0%) content achieves a PREN ≥ 35, protecting internal stem and seat crevices.
Ultra-Low Carbon Matrix: Low carbon limit (C ≤ 0.02% max) eliminates intergranular carbide precipitation during field welding.
Non-Magnetic Structure: Maintains a fully stable austenitic microstructure in sub-zero and high-temperature processing conditions.

Key Industrial Applications

Sulfuric Acid Production & Dosing: Flow regulation in acid concentration units, scrubbers, and heat exchanger bypass loops.
Phosphoric Acid Processing: Slurry handling, wet-process acid digestion tanks, and fertilizer plant flow lines.
Phosphate Fertilizer Manufacturing: Transporting warm reaction liquors containing high chloride and fluoride impurities.
Flue-Gas Desulfurization (FGD): Handling severe acidic condensates and limestone slurries in power plant gas scrubbing systems.
Specialty Chemical Pickling: Isolation of hot pickle liquors, hydrofluoric acid combinations, and organic acid streams.

Chemical Composition & Mechanical Properties

Equivalent Grades Standard Table

Standard Designation	SS 904L Specification
UNS Designation	UNS N08904
Werkstoff Nr.	1.4539
EN Standard	X1NiCrMoCu25-20-5
JIS (Japan)	SUS 890L
Cast Valve Standard	ASTM A351 Grade CK3MCuN
Forged Valve Standard	ASTM A182 / B649 Grade F904L

SS 904L Chemical Composition (%)

Element	Limit Value (%)
Carbon (C)	0.02 max
Manganese (Mn)	2.00 max
Phosphorus (P)	0.04 max
Sulfur (S)	0.03 max
Silicon (Si)	1.00 max
Chromium (Cr)	19.00 – 23.00
Nickel (Ni)	23.00 – 28.00
Molybdenum (Mo)	4.00 – 5.00
Copper (Cu)	1.00 – 2.00
Nitrogen (N)	0.10 max

Industrial Valve Mechanical Properties

Mechanical Property	SS 904L Value
Tensile Strength (Min)	71 ksi / 490 MPa
Yield Strength (0.2% Offset, Min)	31 ksi / 215 MPa
Elongation in 2" / 50mm (Longitudinal, Min)	35 %
Elongation in 2" / 50mm (Transverse, Min)	25 %

Global Supply & Export Network

Operating as an active SS 904L Valves Exporter, we maintain active shipping routes across major industrial hubs:

🇮🇳 India

Mumbai
Pune
Chennai
Faridabad

Middle East

Saudi Arabia
Qatar
Oman
Kuwait

Europe

Germany
Italy
Netherlands
Poland

Asia Pacific

Singapore
Malaysia
Vietnam
Indonesia

🇺🇸 United States

Michigan
Illinois
Texas

Quality Assurance & Inspection

Inspection Stage	Testing & Compliance Standard
Dimensional Verification	Calibrated micrometer checks for face-to-face (ASME B16.10), flange PCD, and wall thickness tolerances.
Chemical & PMI Testing	100% In-House XRF Spectro testing to verify 23-28% Ni, 4-5% Mo, and 1-2% Cu metallurgy.
Mechanical & Hardness Testing	Tensile strength, yield proof, and elongation testing to match ASTM B649 / ASTM A182 standards.
Surface Inspection	Optical scanning to guarantee zero pinholes, casting voids, chatter marks, or seat scratches.
MTC & Certification	Full EN 10204 3.1 / 3.2 Material Test Certificates with NABL-accredited laboratory reports.
Third-Party Inspection	Pre-dispatch TPI available upon request via SGS, TUV, Bureau Veritas, DNV, or Lloyds.

Frequently Asked Questions

Q: What end connections are available for SS 904L valves?

A: We supply SS 904L valves with Flanged Ends (RF, RTJ), Socket Weld (SW), Butt Weld (BW), Male/Female NPT, BSPT, and Dual Ferrule instrumentation tube fittings.

Q: Why is SS 904L preferred over SS 316L for sulfuric acid lines?

A: Grade 904L contains 1–2% Copper and 23–28% Nickel, giving it superior resistance to sulfuric acid across wide concentration and temperature ranges.

Q: What maximum pressure ratings are available for SS 904L valves?

A: We supply Class 150# through 1500# pressure-rated valves, with specialized forged needle and instrumentation valves rated up to 6000 PSIG.

Q: Which markets do you serve as an SS 904L Valves Exporter?

A: We regularly supply certified SS 904L valve assemblies across Saudi Arabia, UAE, Qatar, Oman, Kuwait, Germany, Italy, Singapore, and the United States.

Request a Quote for SS 904L Valves

Contact Nirvaan Overseas—your trusted SS 904L Valves Manufacturer in India and global SS 904L Valves Exporter—for factory-direct pricing, custom dimension manufacturing, API 598 test certification, EN 10204 3.1 MTCs, and fast global dispatch. If you have any questions about the products or services, send us an

Email: sales@nirvaanoverseas.com

Phone / WhatsApp: +91 77386 88058

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