GB/T 4237 07Cr19Ni11Ti S32169 Stainless Steel Plate Supplier
GB/T 4237 07Cr19Ni11Ti: what it is and who uses it
07Cr19Ni11Ti is 321H: carbon 0.04–0.10% and Ti 4 × (C + N) to 0.70% for elevated-temperature strength. Annex B points it at the boiler industry.
Reading the designation: ’07’ gives the carbon level (C 0.04–0.10% in GB/T 4237), followed by Cr19 = about 19% chromium; Ni11 = about 11% nickel; Ti = titanium added. S32169 is the unified numeric code (ISC) used in GB/T 4237-2015. Older drawings and Chinese buyers may still write the pre-2007 name 1Cr18Ni11Ti.
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. 07Cr19Ni11Ti is part of our GB/T 4237 stainless plate range; for comparison, see our AISI 321H page.
What the standard covers for this grade
| Item | GB/T 4237-2015 requirement / SHH STEEL supply |
|---|---|
| Standard | GB/T 4237-2015 Hot rolled stainless steel plate, sheet and strip (current edition, replaces GB/T 4237-2007) |
| Grade / unified code | 07Cr19Ni11Ti / S32169 |
| Steel class | Austenitic |
| Chemical composition | Table 15 (heat analysis); product analysis per GB/T 222 |
| Mechanical properties | Table 20 |
| Product forms | Hot-rolled thick plate (3.0 – 200 mm in the standard), hot-rolled wide strip and cut plate (2.0 – 25.4 mm) |
| Our usual thickness range | 3 – 100 mm |
| Delivery condition | ≥ 1 095 °C, water quench or other rapid cooling |
| Surface | Hot rolled, heat treated, pickled (No.1 / 1D) as standard; ground or polished by agreement |
| Density | 7.93 g/cm³ |
| Certificate | EN 10204 3.1 mill certificate; 3.2 with third-party inspection on request |
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.
Chemical composition of 07Cr19Ni11Ti S32169
| Element | 07Cr19Ni11Ti heat analysis, % (Table 15) | Why it matters |
|---|---|---|
| C | 0.04 – 0.10 | Carbon. Low values protect welds from carbide precipitation; higher values add hot strength or hardenability. |
| Si | ≤ 0.75 | Silicon. Deoxidizer; in heat-resistant grades it builds a protective scale. |
| Mn | ≤ 2.00 | Manganese. Deoxidizer; in Mn-bearing grades it replaces nickel and keeps nitrogen in solution. |
| P | ≤ 0.045 | Phosphorus. Impurity, kept low for toughness and weld cracking resistance. |
| S | ≤ 0.030 | Sulfur. Impurity; low sulfur improves pitting resistance, hot workability and polishability. |
| Cr | 17.00 – 19.00 | Chromium. Forms the passive film; the main driver of corrosion and oxidation resistance. |
| Ni | 9.00 – 12.00 | Nickel. Stabilizes austenite, improves toughness and resistance to reducing acids. |
| Other | Ti: 4 × (C+N) – 0.70 | Stabilizing / special-element requirement of the standard |
| PREN (Cr + 3.3Mo + 16N) | 17.0 – 18.0 (minimum – mid-range) | Calculated from the limits above, not a requirement of GB/T 4237 |
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.
Product (check) analysis tolerances
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 07Cr19Ni11Ti limits. Deviations apply to one side of a range only, never to both sides in the same heat.
| Element | Heat analysis limit (%) | Permitted deviation | Product analysis limit (%) |
|---|---|---|---|
| C | 0.04 – 0.10 | ±0.01 | 0.030 – 0.11 |
| Si | ≤ 0.75 | ±0.05 | ≤ 0.80 |
| Mn | ≤ 2.00 | ±0.04 | ≤ 2.04 |
| P | ≤ 0.045 | +0.010 | ≤ 0.055 |
| S | ≤ 0.030 | +0.005 | ≤ 0.035 |
| Cr | 17.00 – 19.00 | ±0.20 | 16.80 – 19.20 |
| Ni | 9.00 – 12.00 | ±0.10 (min) / ±0.15 (max) | 8.90 – 12.15 |
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.
How titanium or niobium stabilization works
In 07Cr19Ni11Ti the stabilizing element forms carbides that are more stable than chromium carbide, so chromium stays in solution even when the steel passes through 450–850 °C. The standard sets the minimum ratio: Ti: 4 × (C+N) – 0.70.
The ratio works only if carbon and nitrogen are measured and titanium or niobium is high enough. Check the certificate: for a 0.05% C heat, Ti ≥5×C means Ti ≥0.25%; many buyers ask for a margin above the minimum.
Compared with the low-carbon route (GB/T 4237 022Cr19Ni10 S30403 and GB/T 4237 022Cr17Ni12Mo2 S31603), stabilized grades keep more strength above 500 °C, which is why boiler and refinery designers still use them.
07Cr19Ni11Ti S32169 tensile and hardness requirements
| Property | 07Cr19Ni11Ti (Table 20) |
|---|---|
| Proof strength Rp0.2, MPa | ≥ 205 |
| Tensile strength Rm, MPa | ≥ 515 |
| Elongation A, % | ≥ 40 |
| Hardness HBW | ≤ 217 |
| Hardness HRB | ≤ 95 |
| Hardness HV | ≤ 220 |
Values apply to plate in the delivery heat-treated condition, tested transversely per GB/T 228.1. Hardness is checked by one method chosen by the mill.
How 07Cr19Ni11Ti plate is heat treated
Recommended heat treatment for 07Cr19Ni11Ti (GB/T 4237-2015 Annex C): ≥ 1 095 °C, water quench or other rapid cooling.
A stabilizing anneal at about 870–900 °C after welding can be added for parts that will see 450–850 °C service.
Corrosion resistance and PREN of 07Cr19Ni11Ti
Stabilized grades are bought for intergranular corrosion resistance after welding or after service in the 450–850 °C sensitization range. General corrosion resistance is similar to 304 (or 316 for Mo grades).
PREN of 07Cr19Ni11Ti from the GB/T 4237 limits: 17.0 – 18.0. PREN is a ranking tool for pitting in chlorides, not a guarantee; temperature, crevices, deposits and weld finish matter as much.
Intergranular corrosion testing is not compulsory for this grade in GB/T 4237-2015; when required, the method (GB/T 4334, ASTM A262 or A923 for duplex) and acceptance are agreed in the order.
Cross-reference to other standards
| Standard system | Equivalent / closest grade |
|---|---|
| China GB/T 4237-2015 | 07Cr19Ni11Ti (S32169) |
| Former Chinese name | 1Cr18Ni11Ti |
| ASTM A240/A240M | Type 321H / S32109 |
| EN 10088-2 / EN 10095 / EN 10028-7 | X7CrNiTiB18-10 / 1.4941 (EN 10028-7) |
| JIS G4304 (hot rolled) | — |
| Common name | 321H |
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: AISI 321H. See also our ASTM A240/A240M and JIS G4305 plate lists.
Cutting, forming and welding 07Cr19Ni11Ti plate
Weld stabilized grades with Nb-stabilized filler (ER347 / E347) — titanium does not transfer well across the arc, so ER321 is rarely used. For 316Ti use ER318 or ER316L.
Knife-line attack can occur in a narrow band next to the fusion line if the part sees 450–850 °C service after welding. If that is the case, ask for a stabilizing anneal (around 870–900 °C) in the procedure.
Cutting: we cut 07Cr19Ni11Ti by plasma (up to about 150 mm), laser (thin plate) or waterjet, and remove the heat-affected edge by machining where the drawing requires it.
Applications of 07Cr19Ni11Ti plate
Where the stabilized chemistry pays off:
- Boiler superheaters and reheaters
- Refinery heater tubesheets
- High-temperature pressure parts
- Furnace internals under load
Buyers specifying 07Cr19Ni11Ti for these jobs often compare it with GB/T 4237 06Cr18Ni11Ti S32168 and GB/T 4237 07Cr19Ni10 S30409; the comparison table on this page shows the differences.
International grade pages for the alternatives mentioned above: ASTM A240 Type 321, ASTM A240 Type 347H, ASTM A240 Type 304H.
Other GB/T 4237 grades buyers request alongside it: GB/T 4237 06Cr18Ni11Nb S34778, GB/T 4237 06Cr19Ni10 S30408, GB/T 4237 022Cr19Ni10 S30403.
Choosing between 07Cr19Ni11Ti and its neighbours
The table compares 07Cr19Ni11Ti with the grades buyers most often weigh it against. Strength values are GB/T 4237-2015 minimums; PREN is calculated from the minimum chemistry.
| Grade (GB/T 4237) | Key chemistry, % | PREN min | Rp0.2 min, MPa | Rm min, MPa |
|---|---|---|---|---|
| 07Cr19Ni11Ti S32169 | C 0.04 – 0.10, Cr 17.00 – 19.00, Ni 9.00 – 12.00 | 17.0 | 205 | 515 |
| GB/T 4237 06Cr18Ni11Ti S32168 | C ≤ 0.08, Cr 17.00 – 19.00, Ni 9.00 – 12.00, N ≤ 0.10 | 17.0 | 205 | 515 |
| GB/T 4237 07Cr18Ni11Nb S34779 | C 0.04 – 0.10, Cr 17.00 – 19.00, Ni 9.00 – 13.00 | 17.0 | 205 | 515 |
| GB/T 4237 07Cr19Ni10 S30409 | C 0.04 – 0.10, Cr 18.00 – 20.00, Ni 8.00 – 10.50 | 18.0 | 205 | 515 |
Specify grain size grade 7 or coarser if the plate is used to ASME creep allowables (clause 6.6). The Ti formula includes nitrogen, so a high-N heat needs more titanium.
Finishes and warehouse services
| Finish | Description | Availability for this grade |
|---|---|---|
| No.1 / 1D | Hot rolled, heat treated, pickled; the GB/T 4237 standard surface | Standard |
| Shot-blasted + pickled | Uniform matte for welded structures | On request |
| No.4 / brushed | Abrasive finish, grit 150–180 | Warehouse processing, thin plate |
| HL (hairline) | Long continuous lines, decorative | Warehouse processing, thin plate |
| 8K mirror | Polished reflective finish | Warehouse processing, limited sizes |
| 2B / BA | Cold-rolled finishes (ordered as GB/T 3280 sheet, not hot-rolled plate) | Sheet only |
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.
Dimensions and plate weight
| Dimension | Typical supply |
|---|---|
| Thickness | 3 – 100 mm |
| Width | 1 000 / 1 219 / 1 250 / 1 500 / 1 800 / 2 000 mm; wider by mill order |
| Length | 2 000 / 2 438 / 3 000 / 6 000 mm or cut to size |
| Flatness | Per GB/T 4237; ≤15 mm per metre for plate up to 25 mm unless agreed tighter |
| Thickness tolerance | Per the GB/T 4237 dimensional tolerance tables (normal or higher accuracy as ordered) |
| Edge | Mill edge or cut edge |
Weight: plate mass in kg/m² = thickness (mm) × density (7.93 g/cm³). A 10 mm 07Cr19Ni11Ti plate weighs about 79.3 kg/m²; a 1 500 × 6 000 × 10 mm plate about 714 kg.
Inspection, tests and mill certificates
- Heat chemical analysis on every heat; product analysis by agreement
- Tensile test (Rp0.2, Rm, A) per batch
- Hardness test
- 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.
Ordering information
- Standard and edition: GB/T 4237-2015
- Grade and code: 07Cr19Ni11Ti (S32169); 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.
Mill sourcing and lead time
07Cr19Ni11Ti 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.
FAQ
- What is the difference between 321 and 321H?
- 321H (07Cr19Ni11Ti) requires carbon 0.04–0.10% and Ti 4×(C+N)–0.70%; 321 (06Cr18Ni11Ti) caps C at 0.08% with Ti ≥5×C. The guaranteed carbon and coarse grain give 321H better creep strength above about 540 °C.
- What is the chemical composition of 07Cr19Ni11Ti?
- Under GB/T 4237-2015 Table 15, 07Cr19Ni11Ti (S32169) has C 0.04 – 0.10, Cr 17.00 – 19.00, Ni 9.00 – 12.00; Ti: 4 × (C+N) – 0.70. Phosphorus is limited to ≤0.045% and sulfur to ≤0.030%.
- What is the ASTM equivalent of 07Cr19Ni11Ti?
- The closest equivalents of 07Cr19Ni11Ti (S32169) are Type 321H / S32109 in ASTM, X7CrNiTiB18-10 / 1.4941 (EN 10028-7) in EN (common name: 321H). Chemistry limits differ slightly, so dual certification depends on the actual heat.
- What are the mechanical properties of 07Cr19Ni11Ti plate?
- GB/T 4237-2015 Table 20 requires for 07Cr19Ni11Ti: proof strength Rp0.2 ≥205 MPa, tensile strength ≥515 MPa and elongation ≥40%, hardness ≤217 HBW. Values apply to plate in the delivery heat-treated condition.
- Is 07Cr19Ni11Ti stainless steel magnetic?
- Not in the annealed condition. 07Cr19Ni11Ti is austenitic, so annealed plate is essentially non-magnetic; cold work can induce slight magnetism, mostly at cut and bent edges.
- What thickness of 07Cr19Ni11Ti plate can you supply?
- Under GB/T 4237 we supply 07Cr19Ni11Ti hot-rolled plate in 3 – 100 mm, widths up to 2 000 mm (wider by mill order), cut to size in our warehouse. Thinner material is cold-rolled sheet to GB/T 3280.
Conclusion
GB/T 4237 07Cr19Ni11Ti (S32169) is a stabilized austenitic plate grade, known internationally as 321H. It is defined by Table 15 chemistry (C 0.04 – 0.10, Cr 17.00 – 19.00, Ni 9.00 – 12.00) and Table 20 properties of at least 205 MPa proof strength and 515 MPa tensile strength. Typical uses include boiler superheaters and reheaters, refinery heater tubesheets and high-temperature pressure parts. Specify grain size grade 7 or coarser if the plate is used to ASME creep allowables (clause 6.6).
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 07Cr19Ni11Ti 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 06Cr18Ni11Ti S32168 and GB/T 4237 07Cr18Ni11Nb S34779, our GB/T 4237 category and the AISI 321H page. Send your sizes and quantities for a quotation.
Quality Steel Needed? Inquire for Offers
Related Products
