Hot Rolled Stainless Steel Flat Rod Square Bar 304 316 321 316 201
Ss Flat Bar
OD | 6 - 500mm | Surface | Black And Bright |
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Length | 3 - 12m | Condition | Heat Treatment |
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Type | Hot Rolled | Alloy Or Not | Is Alloy |
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Technique | Hot Rolled,Forged,Cold Drawn | Standard | ASTM, DIN, AISI, JIS |
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Diameter | 12mm - 650mm |
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Steel Rectangular Bar SAE 8620 A + C AISI 8620 DIN 10278 DIN 1.6523
Recognized Cold Stretcted
Grade Introduction
SAE 8620 Alloy Steel is a low alloy nickel, chromium, molybdenum
case hardening steel, generally supplied in the as - rolled
condition with a maximum hardness HB 255max. SAE 8620 alloy steel
offers high external strength and good internal strength, making it
highly wear-resistant. SAE 8620 steel has a higher core strength
than grades 8615 and 8617.
SAE 8620 alloy steel is flexible during hardening treatments, thus
enabling improvement of case/core properties. Prehardened and
tempered (uncarbonized) 8620 can be further surface hardened by
nitriding but will not respond satisfactorily to flame or induction
hardening due to its low carbon content. SAE 8620 alloy steel is
suited for applications that require a combination of toughness and
wear resistance. This grade is commonly supplied in a round bar.
Grade Application:
The SAE 8620 can be used for a number of medium - strength
applications such as camshafts, fasteners, gears, and chains /
chain pins.
Equivalent grades:
USA | DIN | BS | BS | JAPAN |
ASTM A29 | DIN 1654 | EN 10084 | BS 970 | JIS G4103 |
8620 | 1.6523 / 21NiCrMo2 | 1.6523 / 21NiCrMo2-2 | 805M20 | SNCM220 |
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C,
EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, OHNS, D2, D3, H
- 11, H - 13, CW - 1, M2, M35, M42, 2714, SKD - 11, P20, P20+S, P20
+ Ni, SCM 420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE
4140, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8,
40C8, 45C8, 55C8, C55MN75, SAE 52100, S40C, S355J2G3.
Our Supply Range
SAE8620, SAE8620 Steel, SAE8620 Chemical composition, SAE8620
Mechanical properties, SAE8620 Equivalent Grades, SAE8620 Steel
plate, SAE8620 Steel sheet, SAE8620 Manufacturers, SAE8620
Suppliers, SAE8620 Dealers, SAE8620 Stockist, SAE8620 Distributors,
SAE8620 Wholesalers, SAE8620 Traders.
Chemical composition
The following table shows the chemical composition of SAE8620
steel
Standard | Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
ASTM A29 | 8620 | 0.18 - 0.23 | 0.7 - 0.9 | 0.035 | 0.040 | 0.15 - 0.35 | 0.4 - 0.7 | 0.4 - 0.6 | 0.15 - 0.25 |
DIN 1654 | 1.6523 /21NiCrMo2 | 0.17 - 0.23 | 0.65-0.95 | 0.035 | 0.035 | ≦ 0.40 | 0.4 - 0.7 | 0.4-0.7 | 0.15 - 0.25 |
EN 10084 | 1.6523 /21NiCrMo2 - 2 | 0.17 - 0.23 | 0.65 - 0.95 | 0.025 | 0.035 | ≦ 0.40 | 0.4-0.7 | 0.35 - 0.70 | 0.15 - 0.25 |
JIS G4103 | SNCM220 | 0.17 - 0.23 | 0.6 - 0.9 | 0.030 | 0.030 | 0.15 - 0.35 | 0.4 - 0.7 | 0.4 - 0.65 | 0.15 - 0.3 |
BS 970 | 805M20 | 0.17 - 0.23 | 0.6 - 095 | 0.040 | 0.050 | 0.1 - 0.4 | 0.35 - 0.75 | 0.35 - 0.65 | 0.15 - 0.25 |
Mechanical Properties
Properties | Metric | Imperial |
Tensile strength | 530 MPa | 76900 psi |
Yield strength | 385 MPa | 55800 psi |
Elastic modulus | 190 - 210 GPa | 27557 - 30458 ksi |
Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
Poisson’s ratio | 0.27 - 0.30 | 0.27 - 0.30 |
Izod Impact | 115 J | 84.8 ft.lb |
Hardness, Brinell | 149 | 149 |
Hardness, Knoop (converted from Brinell hardness) | 169 | 169 |
Hardness, Rockwell B (converted from Brinell hardness) | 80 | 80 |
Hardness, Vickers (converted from Brinell hardness) | 155 | 155 |
Machinability (hot rolled and cold drawn, based on 100
machinability for AISI 1212 steel) | 65 | 65 |
Hardness
149
Heat treatment
This alloy may be hardened by heating to 1500 F followed by a water
quench. Carburize at 1650 to 1700 F in an appropriate carburizing
medium and oil quench to harden. Improved carburized case and core
properties can be obtained by furnace cooling from carburizing at
1650 – 1700 F and then reheating to 1575 F.
Hardening
The AISI steel 8620 will be austenitized at around 840°C – 870°C,
and oil or water quenched depending upon section size and
intricacy. Cool in Air or Oil required.
Tempering
Tempering of heat-treated and water quenched parts of SAE 8620
steel (not carburized) is done at 400 F to 1300 F to improve case
toughness with minimal effect on its hardness. This will also
reduce the possibility of grinding cracks.
Forging Properties
SAE 8620 alloy steel is forged at a start temperature of around
2250ºF (1230ºC) down to approximately 1700ºF(925ºC.) prior to the
hardening heat treatment or carburizing. The alloy is air cooled
after forging.
Stress Relieving
Heat to 630°C – 650°C, hold until temperature is uniform throughout
the section, soak for 1 hour per 25mm section, and cool in still
air.
Normalizing
1675ºF (910ºC) and air cool. This is another method of improving
machinability in 8620 material; normalizing might also be used
prior to case hardening.
Annealing
AISI 8620 steel may be given a full anneal by heat to 820℃ – 850℃,
and hold until temperature is uniform throughout the section and
cool in the furnace or air-cooled.
Density
Density (lb / cu. in.) 0.283
Machinability
The SAE 8620 alloy steel is readily machined after heat treatment
and/or carburizing, should be at a minimum so as not to impair the
hardened case of the part. Machining may be done by conventional
means prior to heat treatment – after carburizing machining is
usually limited to grinding.
Welding
The alloy SAE 8620 may be welded as-rolled condition by
conventional methods, usually gas or arc welding. Preheating at 400
F is beneficial and subsequent heating after welding is recommended
– consult the approved weld procedure for the method used.
