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Stainless steel blocks are solid square or rectangular metal sections used for machining, tooling, mould bases, dies, valve parts, pump components, equipment bases and customised engineering parts. They may be cut from stainless steel plates or solid bars, or supplied as forged blocks when specifically required by the buyer.
Solitaire Steel & Engineering LLP, based in Khetwadi, Mumbai, India, supplies and exports stainless steel blocks in all commonly required grades, standards and dimensions. Blocks can be supplied in standard sizes or cut according to the buyer’s required length, width, thickness, drawing and machining allowance.
Our stainless steel block range includes 202, 304, 304L, 316, 316L, 310, 310S, 317, 317L, 321, 347, 410, 420, 430, 440C, duplex, super-duplex, 17-4 PH, 904L and 254 SMO grades.
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| Specification | Available Range |
| Product | Stainless steel blocks |
| Shape | Square and rectangular |
| Manufacturing Type | Plate-cut, bar-cut, saw-cut, forged or machined |
| Grades | Austenitic, ferritic, martensitic, duplex, super-duplex and precipitation-hardening |
| Dimensions | All standard and customised sizes |
| Surface Condition | Mill finish, saw-cut, ground or machined |
| Heat-Treatment Condition | Annealed, solution-annealed, hardened, tempered or aged as applicable |
| Cutting | Band-saw, plasma, waterjet or CNC cutting as required |
| Machining Allowance | Available according to finished component dimensions |
| Testing | Chemical, mechanical, hardness, PMI and ultrasonic testing as required |
| Documentation | Material test certificate and inspection documents as applicable |
| Packing | Standard or export packing |
Availability should be confirmed according to the required grade, standard, dimensions, condition, quantity and testing requirements.
| Grade | Main Characteristics | Common Applications |
| 202 | Good strength and economical for mild indoor environments | General machining, decorative parts and equipment components |
| 304 | Good general corrosion resistance and machinability | Machinery, fixtures, food equipment and general engineering |
| 304L | Low-carbon grade suitable for welded fabrication | Welded components, tanks and machined parts |
| 316 | Improved resistance to chlorides and chemicals | Marine-related, chemical and industrial components |
| 316L | Low carbon with good weldability and corrosion resistance | Pharmaceutical, food, chemical and process equipment |
| 310/310S | Good oxidation resistance at elevated temperatures | Furnace parts, heat-treatment equipment and high-temperature components |
| 317/317L | Higher molybdenum content than 316/316L | Chemical, pulp and process-equipment components |
| 321 | Titanium-stabilised stainless steel | Heat-resistant and welded components |
| 347 | Niobium-stabilised stainless steel | High-temperature and pressure-equipment parts |
| 410 | Heat-treatable with good strength | Shafts, valve parts, fasteners and machine components |
| 420 | Higher hardness and wear resistance | Dies, tools, blades and wear components |
| 430 | Ferritic and magnetic stainless steel | Appliances, automotive and general engineering |
| 440C | High hardness and wear resistance | Bearings, tooling and precision wear components |
| Duplex 2205 | High strength with good chloride resistance | Chemical, oil and gas and marine-related equipment |
| Super Duplex 2507 | High resistance to pitting and crevice corrosion | Offshore, desalination and severe process applications |
| 17-4 PH | High strength with useful corrosion resistance | Aerospace, defence, valves and precision engineering |
| 904L | High-alloy austenitic stainless steel | Chemical-processing and corrosion-resistant equipment |
| 254 SMO | High resistance to chlorides and aggressive environments | Desalination, chemical and offshore components |
The final grade should be selected according to corrosion exposure, temperature, mechanical load, machining and welding requirements.
| Type | Description | Suitable Requirement |
| Plate-Cut Blocks | Cut from stainless steel plates | General machining, bases, fixtures and equipment parts |
| Bar-Cut Blocks | Cut from solid square, rectangular or round bars | Smaller machined and repetitive components |
| Saw-Cut Blocks | Cut to the required length, width and thickness | CNC machining and customised components |
| Forged Blocks | Produced from forged stainless steel stock | Heavy-duty, pressure and high-load applications |
| Rough-Machined Blocks | Supplied with excess material removed | Buyers completing final machining |
| Finish-Machined Blocks | Machined according to approved drawings | Precision and ready-to-use components |
| Product or Material Form | Commonly Applicable Standards |
| Plate-Cut Stainless Steel Blocks | ASTM A240/A240M, ASME SA240 |
| Stainless Steel Bar-Cut Blocks | ASTM A276/A276M |
| Pressure-Equipment Bar Material | ASTM A479/A479M, ASME SA479 |
| Forged Stainless Steel Blocks | Applicable ASTM, ASME, EN or customer forging specification |
| Duplex and Super-Duplex Blocks | Applicable ASTM A240, ASTM A276, ASTM A479 or approved specification |
| Precipitation-Hardening Blocks | Applicable ASTM A564, ASTM A693 or forging specification |
| European Stainless Steel Material | Applicable EN 10088 product standard |
| Customer-Specific Blocks | As per approved drawing and material specification |
The standard must match the original material form. A block cut from ASTM A240 plate remains plate material; it should not be described as a forging unless it was genuinely produced and certified as a forged product.
Solitaire Steel & Engineering LLP can review requirements for:
Buyers should provide whether the stated dimensions are the required raw-block dimensions or the final machined dimensions.
The properties of a stainless steel block depend on its grade, heat treatment and manufacturing route.
| Property | General Performance |
| Corrosion Resistance | Varies from general atmospheric resistance to severe chloride and chemical resistance |
| Mechanical Strength | Available from general-purpose to high-strength grades |
| Machinability | Grade-dependent; suitable tools and cutting parameters are required |
| Weldability | Good in many austenitic and duplex grades |
| Heat Resistance | Available in grades such as 310S, 321 and 347 |
| Hardness | Higher in martensitic and precipitation-hardening grades |
| Dimensional Stability | Depends on material condition and machining process |
| Surface Finish | Mill, saw-cut, ground, polished or machined |
Because the page covers multiple grades, one chemical-composition or mechanical-property table would be technically incorrect. Grade-specific values should be taken from the applicable material test certificate.
Depending on the grade and application, stainless steel blocks can be supplied with:
Testing requirements should be stated before placing the order.
| Selection Factor | Stainless Steel Block | Stainless Steel Plate |
| Form | Solid square or rectangular blank | Flat rolled product |
| Common Requirement | Machining into a component | Fabrication, forming or construction |
| Dimensions | Cut according to the component requirement | Supplied in standard sheet or plate dimensions |
| Machining Allowance | Commonly required | Usually not required for fabrication |
| Typical Application | Dies, valves, pumps, fixtures and tooling | Tanks, panels, vessels and fabricated structures |
| Supply Condition | Cut, ground or machined | Mill finish, polished or cut-to-size |
A plate-cut block can be the most economical choice when certified plate is suitable for the final component. A forged block should be specified only when the design, loading or governing standard requires forged material.
For an accurate quotation, please provide:
For a quotation for stainless steel blocks in standard or customised sizes, contact Solitaire Steel & Engineering LLP. Our team will review the required grade, standard, dimensions, cutting method, machining allowance, testing, quantity and delivery location before confirming availability and pricing.
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