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Industries OverviewThe company's products are primarily used in industrial equipment sectors such as nuclear power, petroleum, petrochemicals, chemical engineering, power generation, automotive manufacturing, shipbuilding, fertilizer production, pharmaceuticals, papermaking, sugar refining, and machinery manufacturing. -
Products & SolutionsOur Products: Ferrous metal ore raw materials (nickel ore, ferronickel, ferrochrome, ferromanganese, ferrosilicon, etc.), seamless pipes, welded pipes, medium-thick plates, plate coils, bars, wire rods, wire coils, pipe fittings, flanges, castings, etc. -
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Process VisualizationThe company's products are primarily used in industrial equipment sectors such as nuclear power, petroleum, petrochemicals, chemical engineering, power generation, automotive, shipbuilding, fertilizer production, pharmaceuticals, papermaking, sugar refining, and machinery manufacturing. -
About UsTsisco Industrial Ltd. was established in 2010. Originating from the Tsingshan ecosystem’s Shanghai platform, the company now operates independently and focuses on global supply-chain integration, distribution, and import/export of steel and alloy materials. We achieved ISO 9001 certification from TÜV Rheinland in 2012, and ISO 9001, ISO 14001 and ISO 45001 certifications from LRQA in 2022. These accreditations underpin continuous improvement and stable performance in quality, environment, and occupational health & safety.
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Products & Solutions
Stainless HR & Bright Bars
Stainless HR & Bright Bars
Stainless HR & Bright Bars｜Global Sourcing for Engineering & Procurement
1. Product Overview & Scope
• Forms: hot-rolled black, HRAP, cold-drawn, peeled, turned, ground; rounds, squares, hexagons, flats; forged rounds and machined blanks.
• Uses: machined parts, pump shafts and valve stems, flange blanks, fastener blanks, petrochemical and offshore components, food and pharma equipment, cryogenic and high-temperature parts.
• Lengths: 3–12 m typical, fixed lengths on request; chamfered or sawn ends available.
• Conditions: solution-annealed; precipitation-hardened (for PH grades); optional UT and precision tolerances.
2. Standards Matrix (Global & China)
• General: ASTM A484 (general requirements for stainless bars, billets and forgings), ISO 15510 (chemistry).
• Bars: ASTM A276 (general-purpose bars and shapes), ASME SA-276 (ASME notation), ASTM A479 (bars for boilers/pressure service), ASME SA-479, ASTM A582 (free-machining), ASTM A564 (precipitation-hardening bars).
• Europe: EN 10088-3 (delivery conditions for stainless bars and shapes), EN 10272 (stainless bars for pressure purposes), EN 10250-4 (stainless steel open-die forgings).
• China & Japan: GB/T 1220 (stainless bars), GB/T 20878 (chemistry), JIS G4303 (stainless bars).
• Testing & processes: ASTM A370 (mechanical), ASTM A262 (IGC), ASTM A923 (duplex), ASTM G48 (pitting/crevice), ASTM A967 & ASTM A380 (pickling/passivation), ASTM E112 (grain size), EN 10308 or ASTM A388 (UT), EN 10204 (3.1/3.2).
• Compliance: PED on request with MTC and declarations; third-party witnessing available.
3. Grade Matrix (examples)
• Austenitic: 304, 304L, 316, 316L, 321, 347, 310S, 904L, 254SMo (S31254).
• Free-machining: 303, 416 (for machining; not recommended for welding or high-chloride service).
• Ferritic: 430, 444.
• Martensitic: 410, 420, 431.
• Duplex & super duplex: 2205 (S32205), 2507 (S32750, S32760).
• Precipitation-hardening: 17-4PH (S17400; H900/H1025/H1150), 15-5PH (S15500), 13-8Mo (S13800).
• Notation: Chinese name + UNS or EN (e.g., “2205 (S32205, 1.4462)”).
4. Quick Mapping: Service → Material → Standard → Size
• General chemicals & low-chloride water: 304L or 316L; ASTM A276 or A479; Ø8–300 mm; solution-annealed and pickled.
• Seawater & high chlorides: 2205 or 2507; ASTM A479 / EN 10272; Ø10–250 mm; ASTM A923 & ASTM G48 sampling; ferrite and μr as specified.
• Food & pharma equipment: 316L (controlled S) or 2205; ASTM A276; turned/ground finish; pickling & passivation to ASTM A967/ASTM A380; clean packaging.
• Pump shafts, valve stems, flange blanks: 316L, 2205, 17-4PH; ASTM A479 (pressure) or ASTM A564 (PH); Ø20–350 mm; straightness and UT to EN 10308 or ASTM A388.
• Cryogenic: 304L or 316L; ASME SA-479; add CVN if required; fixed lengths to minimize welds.
• High-temperature oxidation: 310S, 347 or 321; ASTM A479; specify grain size window (ASTM E112) if needed.
• High strength & wear: 17-4PH/15-5PH/13-8Mo; ASTM A564; order H900/H1025/H1150; define machining allowance and distortion control.
5. Dimensions & Tolerances
• Diameters: 6–500 mm typical (larger via forged rounds + rough machining).
• Lengths: 3/6/9/12 m and fixed lengths; sawn or chamfered ends.
• Tolerances & form: per ASTM A484 or EN 10060 (hot-rolled rounds) and EN 10278 (bright bars); precision h9/h10/h11 available; straightness typically ≤1.5 mm/m unless tighter specified.
• Surface: black, HRAP, peeled, turned, ground; specify Ra for sealing or fit surfaces.
6. Manufacturing & Heat Treatment
• Route: EAF/BOF + AOD/VOD → CC billet/ingot → hot rolling/open-die forging → solution anneal & rapid quench → straightening → peel/turn/grind → preservation & marking.
• PH grades: ageing per ASTM A564 (H900/H1025/H1150) with HT records.
• Duplex: control phase balance; avoid σ/χ; provide ferrite content if required.
7. Quality & Testing
• Chemistry: per order grade & ISO 15510/GB, with PMI at receipt.
• Mechanical: to ASTM A276/A479/A564, EN 10088-3 or EN 10272; methods to ASTM A370.
• Corrosion & phase: ASTM A262 (austenitic), ASTM A923 (duplex), ASTM G48 (pitting); magnetic permeability limits where applicable.
• NDE: UT per EN 10308 or ASTM A388; zone UT for large rounds and forgings.
• Documentation: EN 10204 3.1/3.2 MTC, HT records, test reports; TPI on request.
8. Supply & Packaging
• Marking: heat number, grade, size, condition, tolerance class, standards, lot.
• Protection: end caps, rust-preventive oil, film and VCI; segregate from carbon steel.
• Logistics: crated or skidded with anti-slip and strapping; moisture protection for marine shipments.
9. RFQ Checklist (Copy-Ready)
1. Service, medium, temperature/pressure; pressure equipment or not.
2. Grade & standard: e.g., “2205 (S32205) to ASTM A479” or “17-4PH to ASTM A564”.
3. Size & precision: diameter × length; tolerance (ISO 286 h9/h10 or EN 10278); straightness limit; machining allowance.
4. Condition & finish: HRAP/peeled/turned/ground; Ra if critical.
5. Testing: UT level (EN 10308 or ASTM A388), PMI, A262/A923/G48, grain size, μr.
6. Docs: EN 10204 3.1/3.2, HT curves, reports, TPI scope.
7. Delivery & packing: ends, marking, anti-rust, moisture control, handling; lead-time and release plan.
10. Risk Checklist (Common Pitfalls)
• Using ASTM A276 in pressure equipment where ASME SA-479/ASTM A479 is required.
• Selecting 304 or 303 for severe chloride or welded service; use 316L/duplex or higher alloys instead; 303 is not for welding/high-Cl⁻.
• Omitting tolerance and straightness on shaft and fit parts.
• No A923/G48 on duplex → embrittlement/pitting risk.
• No ageing condition for PH grades (e.g., H900/H1025/H1150).
• No UT level for large-diameter rounds/critical shafts.
• No pickling/passivation where cleanliness is mandatory (ASTM A967/ASTM A380).
11. Representative Spec Lines (Copy-Paste)
• “Bar, ASTM A479, 316L, Ø50 mm × 6 m, HRAP, peeled & turned, straightness ≤1.5 mm/m, EN 10204 3.1, UT per EN 10308 Level 3.”
• “Bar, ASTM A479, 2205 (S32205, 1.4462), Ø80 mm × 6 m, HRAP, peeled & ground, ASTM A923 Method A / ASTM G48 Method A sampling, EN 10204 3.1.”
• “Bar, ASTM A564, 17-4PH, H1150, Ø60 mm × 6 m, turned finish, UT per ASTM A388 (level as specified), EN 10204 3.1.”
• “Bar, ASTM A276, 904L, Ø40 mm × 6 m, HRAP, pickled & passivated, surface finish as specified, EN 10204 3.1.”
Stainless HR & Bright Bars｜Technical Specifications
1) Overview
• Scope: stainless round / square / hex bars supplied as Hot-Rolled (HR), Bright (cold-drawn / peeled / turned / centreless-ground / polished) and Forged.
• Industries: petrochem & pressure equipment, pumps & valves, machinery & automotive, food & pharma, pulp & paper, mining & metallurgy, marine/seawater, power and conventional island in nuclear.
• Note: for pressure service, prefer A479 / EN 10272.
2) Standards Matrix
General / Bars:
• ASTM A276 (stainless bars/shapes)
• ASTM A479/A479M (bars for boiler & pressure service)
• ASTM A484/A484M (general requirements for SS/heat-resisting bars, billets, forgings)
• EN 10088-3 (delivery requirements for long products)
• EN 10272 (bars for pressure purposes)
• GB/T 1220 (SS bars), JIS G4303 (SS bars)
Bright bar tolerances:
• EN 10278 (bright products); ISO 286-2 (tolerance grades h9/h10/h11, g6 per drawing)
Forgings NDE:
• EN 10228-3 / ASTM A388 (UT on forgings)
3) Materials & Grades
• Austenitic: 304/304L, 316/316L, 321, 347/347H, 310S, 904L, 254SMo (S31254)
• Ferritic: 430, 439, 444 (on request)
• Martensitic: 410, 420 (on request)
• Duplex/Super Duplex: 2205 (S32205/31803), 2507 (S32750/32760)
• Precipitation-Hardening: 17-4PH (S17400), 15-5PH (S15500)
• Free-machining: 303, 416 (not for welding or chloride/strong-corrosion service)
Pressure service: select A479 / EN 10272 equivalents.
Duplex: control phase balance (Ferrite 35–65%), avoid sigma phase; apply ASTM A923 & ASTM G48 as required.
4) Dimensions, Tolerances & Route Cutover
4.1 Typical capability
• HR rounds: Ø16–250 mm (economic range); up to Ø280–350 mm on selected mills with extra QA (see 4.3).
• Forged rounds: Ø>250 mm recommended; max per project & forge (commonly Ø600–800 mm+).
• Bright bars: Ø2–100 mm (drawn/peeled/ground/polished); larger by peel+grind.
• Length: 2–6 m typical; longer per HT/handling capability.
• Straightness: typically ≤0.5 mm/m (option ≤0.25 mm/m).
• Surface roughness: ground Ra ≤0.8 µm, finer per drawing.
• Tolerances: Bright per EN 10278 / ISO 286-2 (h9/h10/h11, g6, etc.); HR/Forged per ASTM A484 & mill tables.
4.2 Manufacturing route & size cutover (baseline)
• Baseline: HR Ø16–250 mm; Forged Ø>250 mm by default.
• Mandatory switch for critical service: for pressure parts, flange blanks, heavy rotating shafts, use forged at Ø≥200 mm, unless the supplier’s approved data pack proves HR equivalency (macro-soundness/UT/fatigue).
4.3 Extra QA for HR diameters >Ø250 mm
Supplier shall submit a qualified pack for approval:
1. UT class per EN 10308 or SEP 1921;
2. Macroetch / center soundness per GB/T 226 / ASTM E381 with photos & ratings;
3. Cleanliness / inclusions per ASTM E45 or equivalent;
4. Anisotropy: radial vs. axial mechanical sampling;
5. Duplex/PH phase control: Duplex Ferrite 35–65%, ASTM A923 (A/B/C) & ASTM G48; PH verified in specified aging.
4.4 Minimum total reduction ratio (forging)
• Austenitic ≥3:1; Duplex/PH ≥3.5–4:1 recommended (section or volume cumulative).
• Declare route & cumulative reduction on CMTR.
5) Manufacturing & Heat Treatment
• Routes: HR, open-die/rolled forging, cold drawing, peeling/turning, centreless grinding, polishing.
• Heat treatment: solution anneal (austenitic/duplex; ≥1040 °C fast cool), aging for PH (H900/H1025/H1150), stress-relief per drawing.
• Surfaces: HR black or HRAP; Bright as drawn/peeled/turned/ground/polished; flat/chamfered/lathe-cut ends.
6) QA/QC
• Chem & PMI: heat & product OES; batch PMI; control C, S, P, N, Mo, Cu, Nb, Ti per grade/service.
• Mechanicals: tensile, hardness (HB/HRC); Charpy at sub-zero (e.g., −20/−40 °C) if required.
• Geometry: diameter/tolerance, straightness, ovality, length, end quality.
• NDE:
• Bars UT per EN 10308 / SEP 1921;
• Forgings UT per EN 10228-3 / ASTM A388;
• Surface ECT/MFL/PT/MT as specified.
• Corrosion / phase (as specified):
• Austenitic IGC per ASTM A262 (Practice E);
• Duplex per ASTM A923 (A/B/C), ASTM G48 (A/C) & Ferrite %.
• Docs: EN 10204 3.1/3.2, HT curves, raw UT records, macroetch photos when applicable.
7) Applications → Material Guidance
• General corrosion & machining: 304/304L, 316/316L (stems, shafts, sleeves, structures).
• High-chloride/marine: 2205/2507; prefer forged for shafts/flange blanks; run G48 if required.
• High-temperature/oxidation: 321/347(H), 310S (supports/guards/hot shafts) per temperature rating.
• Hygienic (food/pharma): 316L bright with Ra/cleanliness (user URS); avoid free-machining grades.
• Heavy rotating shafts: 316L/2205 forged at Ø≥200 mm; high-class UT + macro-soundness.
• High-strength PH: 17-4PH/15-5PH in specified aging (H900/H1025/H1150) with dimensional change control.
• Free-machining: 303/416 for non-welded & non-chloride mild service only.
8) Ordering Checklist
1. Form: HR / Bright (drawn/peeled/ground/polished) / Forged.
2. Standard + Grade: e.g., ASTM A479 316L (pressure), ASTM A276 316L (general), EN 10272 1.4404, GB/T 1220 06Cr19Ni10, ASTM A564 17-4PH.
3. Size: Ø × Length; bright tolerance (h9/h10/h11/g6); straightness target; end finish (flat / chamfered / lathe-cut).
4. Route & cutover: Forged above Ø250 mm; if HR > Ø250 mm → provide extra QA pack (UT per EN 10308/SEP 1921 + macroetch per GB/T 226/ASTM E381, etc.); Forged preferred at Ø≥200 mm for pressure/heavy rotating.
5. Heat treatment: solution / aging (H900/H1025…) / stress-relief.
6. QA: UT class, macroetch, cleanliness (E45), Duplex A923/G48, Ferrite %.
7. Surface: HR/HRAP/drawn/peeled/ground/polished; target Ra.
8. Documentation: EN 10204 3.1/3.2, PMI, HT curves, raw UT, macroetch photos if required; TPI (ABS/LR/DNV/BV/TÜV/SGS).
9. Packing: end protection, VCI, moisture & scratch protection, labels (grade/heat/size/weight).
9) Risks & Pitfalls
• Using A276 for pressure service (should be A479 / EN 10272).
• Large diameters with plain HR without macro/UT (avoid HR for >Ø250 mm unless extra QA per 4.3).
• Using HR for Ø≥200 mm pressure/heavy rotating shafts (forging preferred).
• Duplex without A923/G48 or phase control.
• PH condition not defined (H900/H1025/H1150 differ vastly).
• Using 303/416 in welded/chloride/strong-corrosion service.
• Bright bar residual stress unmanaged (post-machining warp).
• Straightness/tolerances/Ra not specified (fit & vibration issues).
10) Delivery & Packing
• HR/Forged: dry or light rust-preventive oil, end protection, wooden box/steel pallet.
• Bright: non-woven wrap + VCI, separated to avoid scratches.
• Labels: grade, standard, size, tolerance, length, heat/batch, weight, route (HR/Forged) & HT condition; EN 10204 3.1/3.2 attached.
Sample Spec Lines
• Pump Shaft (Marine):
Forged bar, ASTM A479 S32205, Ø220 × 6000 mm, UT per EN 10228-3 (per project level), Ferrite 35–60%, ASTM A923 + G48A passed, CMTR 3.2.
• Flange Blank (Pressure):
Forged bar, ASTM A479 316L, Ø280 × 3000 mm, reduction ratio ≥3:1, UT per ASTM A388 (level per spec), macroetch per GB/T 226 passed, CMTR 3.1.
• Precision Shaft (Food):
Bright bar, EN 10088-3 1.4404, Ø25 × 3000 mm, h9, straightness ≤0.25 mm/m, centreless ground Ra ≤0.6 µm, ASTM A262-E passed, CMTR 3.1.
One-liner: Use HR up to Ø250 mm, forged above Ø250 mm; for pressure/heavy rotating ≥Ø200 mm, forged is preferred; if HR is extended to Ø280–350 mm, an approved extra QA pack (UT, macroetch, cleanliness, phase control) is mandatory.
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