Product Details
ASTM A276 420j2 Forged Round Shafts 30cr13 130mm Stainless Steel
Bar Black
INTRODUCTION
Alloy 420 is a hardenable, martensitic stainless steel that is a
modification of 410. Similar to 410, it contains a minimum of 12%
chromium, just sufficient enough to give corrosion resistant
properties.
420 has higher carbon content than 410 which is designed to
optimize strength and hardness characteristics. It has good
ductility it the annealed condition but is capable of being
hardened up to Rockwell hardness 50 HRC, the highest hardness of
the 12% chromium grades. Due to its hardening properties, 420 is
not often welded, although it is possible.
Martensitic stainless steels are designed for high hardness and
sometimes other properties are to some degree compromised.
Corrosion resistance is lower than the common austenitic grades and
their useful operating range is limited by their loss of ductility
at sub-zero temperatures and loss of strength by over-tempering at
elevated temperatures. Its best corrosion resistance is achieved
when the metal is hardened and surface ground or polished.
APPLICATIONS
420 is used for a variety of applications where good corrosion and
outstanding hardness is necessary. It is not usually used at
temperatures exceeding 800oF (427oC) due to quick hardening and
loss of corrosion resistance. Examples of applications that use 420
include:
- Cuttery
- Knife blades
- Surgical instruments
- Needle valves
- Shear blades
- Scissors
- Hand tools
Steel Grade | 420 / 420F / 2Cr13 / 3Cr13 | Application | Mentioned above |
Shape | Round Bar | Standard | GB, ASTM, DIN,JIS |
Dimension | Φ4-800 mm; length below 10m | Surface | Black, Bright, Polished, Peeled |
Technique | Cold drawn; Hot rolled; Forged | Ultrasonic Test | 100% UT Passed |
DELIVERY CONDITIONS
| Diameter (mm) |
Cold drawn | 4-60 |
Peeled | 30-100 |
Grinded | 4-600 |
Turned | 130-800 |
Hot Rolled | 20-280 |
Hot Forged | 130-800 |
EQUIVALENT GRADES OF ASTM 420 / 420F
- JIS G4303: SUS420J1/SUS420J2
- ASTM/ASME: UNS S42000
- EURONORM: X20Cr13/ X30Cr13
- DIN: 1.4021/1.4028
CHEMICAL COMPOSITION (%)
| C | Si | Mn | P | S | Cr |
420 | ≤ 0.15 | ≤ 1.00 | ≤ 1.00 | ≤ 0.040 | ≤ 0.030 | 12.00 14.00 |
2Cr13 | 0.16 0.25 | ≤ 1.00 | ≤ 1.00 | ≤ 0.040 | ≤ 0.030 | 12.00 14.00 |
3Cr13 | 0.26 0.35 | ≤ 1.00 | ≤ 1.00 | ≤ 0.040 | ≤ 0.030 | 12.00 14.00 |
MECHANICAL PROPERTIES
Tempering Temperature | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) MAX |
Annealed | 655 | 345 | 25 | 214 max |
399°F(204°C) | 1600 | 1360 | 12 | 444 |
600°F(316°C) | 1580 | 1365 | 14 | 444 |
800°F(427°C) | 1620 | 1420 | 10 | 461 |
1000°F(538°C) | 1305 | 1095 | 15 | 375 |
1099°F(593°C) | 1035 | 810 | 18 | 302 |
1202°F(650°C) | 895 | 680 | 20 | 262 |
Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) MAX |
2Cr13/20Cr13 | 640 | 440 | 20 | 223 |
3Cr13/30Cr13 | 735 | 540 | 12 | 235 |
RESISTANCE
Corrosion Resistance:
- Less resistant than the austenitic grades and the 17% chromium
ferritic alloys
- Good resistance in the hardened condition to the atmosphere, foods,
fresh water, and mild acids
- Resistance lowered in the annealed condition
- Best with a smooth surface finish
Heat Resistance:
- Not recommended for use above the relevant tempering temperature
because of reduction in mechanical properties
- Scaling temperature is approximately 1202oF (650oC)
PROCESSING
- Tough, stringy chip build-up.
- Similar to machining some of the high carbon tool steel
Welding
- Not commonly welded due to air hardening characteristics.
- Welding may be performed after preheating to 300-400 F
- Post weld tempering at temperature for 2 hours
Hot Working
- Recommended to bring temperatures slowly up to 1400, then on to
2000-2200 F
- Furnace cool slowly to avoid cracking, after furnace working
- Reheating is necessary to keep working temperature above 1600 F.
Cold Working
- Can withstand only minor cold work.
- Radical forming operations will result in cracking.
Annealing
- Anneal at temperatures between 1550-1650 F (843-900 C)
- Allow for slow furnace cooling.
Tempering
- Temper at temperatures of 300-400 F
- Air cool for maximum hardness and corrosion resistance.
Hardening
- Soak at 1850-1950 F to quench in heated oil.
Company Profile
Jiangsu Mittel Steel Industrial Limited is located in Wuxi City, a
beautiful city near Shanghai. Wuxi is close to Shanghai (BAO STEEL)
,Zhangjiagang (ZPSS),Ningbo (BAO XIN),KUN SHAN (DKSS), enjoy
excellent geographic location and convenient water, land and air
transportation. , Wuxi become the biggest stainless steel sheet
,plate and coil supply Centers in China. Jiangsu Mittel Steel
Industrial Limited was established in 1998 years. as one of the
largest stockists and manufacturers of industrial grade Stainless
Steel products and derivatives in Wuxi ,We keep a stock of 50000
tons every month, so we can delivery goods in fast time.
Our company supplies cold/hot-rolled stainless steel
sheets,stainless steel coils and stainless steel Plate to many
steel factories from athome and abroad, including Shanxi Taigang
Iron& Steel CO, . Ltd (TISCO)Zhangjiagang Pohang (ZPSS),
Shanghai BAO STEEL, Ningbo Baoxin and steel factories in Taiwan
area, Mainland Chinese and foreign countries and regions.
Our long-term business lines are
201.202.304(1.4301).304L.316.316L(1.4404).430.409L, 309S
,310S(1.4845).317L.904L.S31803(1.4462).S32750.S32760, Finish: 2B,
BA, NO. 1 NO. 4, HL, 8K and so on...Meanwhile, our company is also
engaged in the long-term supply of homemade & imported medium
and thick plates, galvanized and carbon steel products.
Adhering to the principle of "quality first and customer
foremost",our company will offer long-term service to nationwide
manufacturers of household appliances, elevators, tableware,
ornaments, tanks and machines. We can offer precise frosted
wiredrawing, 8K mirror finishing and skim board oil-abrasion of
various specifications at any time. The precisely-processed
products will meet your requirements for high quality. Our company
is a modern enterprise integrating distribution and storage.
If you are interested in any of our products or would like to
discuss a custom order, please feel free to contact us. We are
looking forward to forming successful business relationships with
new clients around the world in the near future.