A 540 Grade B21 Class 4 Enquiry | Print this page
SAE A 540 Grade B21 Class 4 Details
SAE A 540 Grade B21 Class 4 Standard Download
| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | A 540 Grade B21 Class 4 | Precipitation-Hardening | USA - SAE , A 540/A 540M (2011) - Alloy-Steel Bolting Materials for Special Applications |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.05 | ||
| Si | - | 0.20 | ||
| Mn | - | 0.50 | ||
| P | - | - | ||
| S | - | - | ||
| Ni | - | remaining | ||
| Cr | 15.00 | 17.00 | ||
| Al | 4.00 | 5.00 | ||
| Cu | - | - | ||
| Ti | - | 0.50 | ||
| Fe | 2.00 | 4.00 | ||
| N | - | - | ||
| Mo | - | 0.50 | ||
| B | - | 0.006 | ||
| Zr | - | 0.05 |
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 331 (≥) | 779 (≥) | 33 | 21 | 21 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 213 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 238 (≥) | 451 (≥) | 33 | 24 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 443 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 439 | 987 | 471 |
| Product type | Products | Dimension | Processes | Deliver Status |
|---|---|---|---|---|
| Plates / Sheets | Plates / Sheets | 0.08-200mm(T)*W*L | Forging, hot rolling and cold rolling | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Steel Bar | Round Bar, Flat Bar, Square Bar | Φ8-1200mm*L | Forging, hot rolling and cold rolling, Cast | Black, Rough Turning, Shot Blasting, |
| Coil / Strip | Steel Coil /Steel Strip | 0.03-16.0x1200mm | Cold-Rolled & Hot-Rolled | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Pipes / Tubes | Seamless Pipes/Tubes, Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Hot extrusion, Cold Drawn, Welded | Annealed, Solution and Aging, Q+T, ACID-WASHED |
| Grade | Standard | Country | Application |
|---|---|---|---|
| XM-31 | UNS | USA | Chemical compositions of SAE wrought stainless steels |
| S21400 | AISI | USA | Chemical compositions of SAE wrought stainless steels |
| S21460 | AISI | USA | Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat Bar |
| A 240 S21400 | SAE | USA | Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| A 580 S21400 | SAE | USA | Stainless Steel Wire |
| S21400 | AISI | USA | Austenitic Chromium Manganese Stainless Steel |
| SA-240 S21400 | AMS | USA | Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| 21-4N | UNS | USA | Engine poppet valve information report |
| 21-4N + Nb + W | UNS | USA | Engine poppet valve information report |
| A 214 | SAE | USA | Electric-Resistance-Welded Carbon Steel Heat-Exchanger and Condenser Tubes |
| A 240 S21400 | SAE | USA | Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| A 540 Grade B21 Class 4 | SAE | USA | Alloy-Steel Bolting Materials for Special Applications |
| A 580 S21400 | SAE | USA | Stainless Steel Wire |
| A 666 S21460 | SAE | USA | Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat Bar |
| A 691 Grade 2 1/4 CR | SAE | USA | Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures |
| A 732 Grade 14Q | SAE | USA | Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures |
| A92214 | AISI | USA | Wrought aluminum alloy, heat treatable |
| B 823 CZP-3002-14 | SAE | USA | Materials for Nonferrous Powder Metallurgy (P/M) Structural Parts |
| B 862 Grade 14 | SAE | USA | Titanium and Titanium Alloy Welded Pipe |
| F2146 R56320 | SAE | USA | Standard Specification for Wrought Titanium-3Aluminum-2.5Vanadium Alloy Seamless Tubing for Surgical Implant Applications (UNS R56320) |