GB/T 4237 07Cr19Ni10 S30409 Stainless Steel Plate Supplier

07Cr19Ni10 is the high-carbon 304H of GB/T 4237: carbon 0.04–0.10% and a higher solution temperature (≥1 095 °C in Annex C) give a coarser grain and better creep strength above 500 °C. It is the grade boiler and refinery designers use when 304 must carry load hot.

How to read the name: under GB/T 20878 the leading ’07’ is the carbon code (here C 0.04–0.10%), then Cr19 = about 19% chromium; Ni10 = about 10% nickel. S30409 is the unified numeric code (ISC) used in GB/T 4237-2015.

SHH STEEL produces and exports austenitic stainless plate from China, works as a sales agent for leading stainless mills, and runs its own processing warehouse for cutting and surface finishing. 07Cr19Ni10 is part of our GB/T 4237 stainless plate range; for comparison, see our ASTM A240 Type 304H page.

Sister grades on the same standard are listed under GB/T 4237; cold-rolled sheet of the same chemistry is ordered to GB/T 3280, and all our plate lines sit in stainless steel sheets and plates.

Values are maximum unless a range is given. The mill reports the ladle (heat) analysis on the certificate; this is the figure to compare with Table 15.

A check analysis drilled from the finished plate may differ slightly from the heat analysis. GB/T 4237 refers to GB/T 222 for the permitted deviations; the table applies them to the 07Cr19Ni10 limits. Deviations apply to one side of a range only, never to both sides in the same heat.

Where the table says ‘by agreement’, the deviation is not tabulated for that content level and should be agreed in the contract, usually by reference to ASTM A480 Table A1.1.

Strength minimums apply to solution-treated plate tested transverse to rolling. Actual mill results are usually well above these minimums and are reported on the certificate.

Each 18-8 base grade in GB/T 4237 comes in several variants. L (C ≤0.030%) is for welded parts in corrosive service, H (C 0.04–0.10%) for creep strength, N for higher strength.

07Cr19Ni10 sits in this family as 304H.

Equivalent grades are close in chemistry and properties but are never identical: limits on carbon, nitrogen and residual elements differ. For dual or multiple certification the heat must meet every standard named on the order, and we confirm that from the heat chemistry before quotation.

Related pages: ASTM A240 Type 304H, ASME SA240 304H, AISI 304H. See also our ASTM A240/A240M and JIS G4305 plate lists.

The table compares 07Cr19Ni10 with the grades buyers most often weigh it against. Strength values are GB/T 4237-2015 minimums; PREN is calculated from the minimum chemistry.

Order grain size with the plate. GB/T 4237-2015 clause 6.6 lets the buyer require grain size grade 7 or coarser for 07Cr19Ni10; ASME code design stresses for 304H assume that coarse grain. The same carbon that gives creep strength makes the grade sensitive to intergranular attack after welding, so do not use it in wet corrosive service.

Austenitic 18-8 grades resist atmospheric corrosion, fresh water, foods, nitric acid and most organic acids. They are vulnerable to chlorides (pitting, crevice and stress corrosion cracking above about 60 °C).

PREN of 07Cr19Ni10 from the GB/T 4237 limits: 18.0 – 19.0. PREN is a ranking tool for pitting in chlorides, not a guarantee; temperature, crevices, deposits and weld finish matter as much.

Intergranular corrosion: GB/T 4237-2015 Table 30 lists this grade for the copper–copper sulfate–sulfuric acid test (GB/T 4334 Method E) in the solution-treated condition. When the order calls for it, bent specimens must show no intergranular cracks.

If service is harsher than 07Cr19Ni10 can handle, the next step up in this batch is GB/T 4237 07Cr17Ni12Mo2 S31609.

Recommended heat treatment for 07Cr19Ni10 (GB/T 4237-2015 Annex C): ≥ 1 095 °C, water quench or other rapid cooling.

Solution treatment dissolves carbides and restores full corrosion resistance and ductility. Hot forming should finish above about 900 °C and be followed by a new solution anneal if the part is used in corrosive service.

Austenitic 18-8 plate welds well with every arc process (SMAW, GTAW, GMAW, SAW, FCAW). Use ER308L/E308L filler for 304 and 304L, ER347 where the joint must resist sensitization at high carbon, and ER308H for H grades.

Keep interpass temperature below about 150 °C, avoid preheat, and remove heat tint by pickling or brushing with stainless brushes. Distortion is higher than with carbon steel because thermal expansion is about 50% greater and conductivity much lower; plan tacking sequence and fixtures.

Cold forming: austenitic plate bends to tight radii (inside radius ≈ thickness for most gauges) but springs back more than carbon steel.

Our warehouse cuts plate to size (plasma, laser, waterjet, saw), bevels weld edges, polishes and applies PVC protective film. Processed plate ships with the original mill heat number marked. Ask for cut pieces of other stainless steel products at the same time to consolidate freight.

Weight: plate mass in kg/m² = thickness (mm) × density (7.93 g/cm³). A 10 mm 07Cr19Ni10 plate weighs about 79.3 kg/m²; a 1 500 × 6 000 × 10 mm plate about 714 kg.

Typical end uses we ship this grade for:

• Boiler and superheater components, headers and support plates
• Refinery and petrochemical heater internals
• Pressure vessel shells in high-temperature service
• Expansion bellows and hot ducting
• Fluidized-bed and catalytic reactor internals
• Steam pipe supports and hangers

Buyers specifying 07Cr19Ni10 for these jobs often compare it with GB/T 4237 06Cr19Ni10 S30408 and GB/T 4237 06Cr25Ni20 S31008; the comparison table on this page shows the differences.

• Heat chemical analysis on every heat; product analysis by agreement
• Tensile test (Rp0.2, Rm, A) per batch
• Hardness test
• Intergranular corrosion test, GB/T 4334 Method E (Table 30)
• Grain size, grade 7 or coarser (GB/T 6394), when ordered
• Ultrasonic testing (NB/T 47013.3 or ASTM A578) when specified
• Positive material identification (PMI) on every plate leaving our warehouse
• Visual and dimensional inspection; third-party inspection (SGS, BV, TÜV, Intertek) at the buyer’s request

Certificates follow EN 10204 3.1 as standard. Where plate is also certified to ASME SA240 or ASTM A240, both standards are shown on one certificate.

• Standard and edition: GB/T 4237-2015
• Grade and code: 07Cr19Ni10 (S30409); add the equivalent if dual certification is needed
• Thickness × width × length, quantity in pieces or tonnes
• Thickness tolerance class and flatness if tighter than standard
• Surface finish and protective film
• Tests beyond the standard (IGC, UT, impact, ferrite, PMI, grain size)
• Certificate type (EN 10204 3.1 / 3.2) and inspection body
• Marking, packing (wooden cases, steel pallets) and delivery terms

Send the list to SHH STEEL and we return a quotation with mill, lead time and stock options. Other grades from the same standard can be combined in one shipment; browse GB/T 4237 plate grades.

07Cr19Ni10 is a mainstream grade at Chinese stainless mills. We supply it from our own stock and processing warehouse, and by mill order from major producers such as TISCO and Baosteel Stainless, for which we act as a sales agent. Stock plate ships in about 1–2 weeks after cutting; mill orders typically take 30–60 days depending on thickness and rolling schedule.

Every plate is traceable to its heat number, and copies of the mill certificates stay on file for repeat orders and audits. The same mills also supply our ASTM A240, ASME SA240, JIS G4305 and AISI plate ranges, so mixed-standard orders can ship together.

• Mill-direct prices with our own export documentation
• Own processing warehouse: cutting, bevelling, polishing, PVC film
• PMI and dimensional check before packing
• Mixed-grade shipments across our AISI stainless and GB/T plate ranges
• Technical answers from people who read the standard, not just the price list

SHH STEEL has exported stainless and carbon steel plate to buyers in Asia, the Middle East, Africa, Europe and the Americas.

GB/T 4237 07Cr19Ni10 (S30409) is a 18-8 chromium-nickel austenitic plate grade, known internationally as 304H. It is defined by Table 15 chemistry (C 0.04 – 0.10, Cr 18.00 – 20.00, Ni 8.00 – 10.50) and Table 20 properties of at least 205 MPa proof strength and 515 MPa tensile strength. Typical uses include boiler and superheater components, headers and support plates, refinery and petrochemical heater internals and pressure vessel shells in high-temperature service. Order grain size with the plate.

Before ordering, state the standard edition, the grade name with its code, and any extra tests, so that the mill certificate matches your design documents. SHH STEEL supplies 07Cr19Ni10 plate from stock and by mill order, cut to size and finished in our own warehouse, with EN 10204 3.1 certificates. For related grades see GB/T 4237 06Cr19Ni10 S30408 and GB/T 4237 07Cr17Ni12Mo2 S31609, our GB/T 4237 category and the ASTM A240 Type 304H page. Send your sizes and quantities for a quotation.