| After-sales Service: | 24 Hours on Line |
|---|---|
| Warranty: | Three Years |
| Standard: | AISI, ASTM, GB, JIS, DIN, BS |
| Technique: | Forged |
| Application: | Structural Steel Bar, Tool Steel Bar, Die Steel Bar |
| Surface Treatment: | Polished |
| Samples: |
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| Customization: |
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GB 55 | JIS S55C DIN C55/Cm55 | ASTM 1055 | BS EN9/070M55 Engineering Steel
Quick Details
1: 1055 steel introduction
1055 steel is an unalloyed medium carbon engineering steel which has 0.52%-0.6% Carbon as per EN10083 standard.It will obtain high hardness and high strength after hardening due to the relatively high carbon content,and also can be flame or induction hardened to surface hardness Min 58HRC.C55 steel is generally supplied in an untreated or normalised condition
2.Chemical Composition
| Grade | C | Mn | P | S | Si | Cr | Mo | Ni | Cr+Mo+Ni |
| C55/1.0535 | 0.52-0.6 | 0.60-0.90 | ≤ 0.045 | ≤ 0.045 | ≤ 0.4 | ≤ 0.4 | ≤ 0.1 | ≤ 0.4 | ≤ 0.63 |
| C55E/1.1203 | 0.52-0.6 | 0.60-0.90 | ≤ 0.03 | ≤ 0.035 | ≤ 0.4 | ≤ 0.4 | ≤ 0.1 | ≤ 0.4 | ≤ 0.63 |
| C55R/1.1209 | 0.52-0.6 | 0.60-0.90 | ≤ 0.03 | 0.02-0.04 | ≤ 0.4 | ≤ 0.4 | ≤ 0.1 | ≤ 0.4 | ≤ 0.63 |
3.Relevant Standards
| USA | UK | China | Japan | Australia |
| 1055 | 070M55 / EN9 | 55# | S55C | 1055 |
| Mechanical properties a at room temperature in the quenched and tempered condition (+QT) | |||
| Diameter d mm | ≤ 16 | 16-40 | 40-100 |
| Thickness t mm | < 8 | 8-20 | 20-60 |
| Yield Strength Mpa | ≥550 | ≥490 | ≥420 |
| Tensile Strength Mpa | 800-950 | 750-900 | 700-850 |
| Elongation, % | ≥12 | ≥14 | ≥15 |
| Reduction of area ,% | ≥30 | ≥45 | ≥40 |
| Mechanical properties a at room temperature in the normalized condition (+N) | |||
| Diameter d mm | ≤ 16 | 16-100 | 100-250 |
| Thickness t mm | ≤ 16 | 16-100 | 100-160 |
| Yield Strength Mpa | ≥370 | ≥330 | ≥300 |
| Tensile Strength Mpa | ≥680 | ≥640 | ≥620 |
| Elongation, % | ≥11 | ≥12 | ≥12 |
| Size | Round | Dia 6-1200mm |
| Plate/Flat/Block | Thickness 6mm-500mm |
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| Width 20mm-1000mm |
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| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Delivery time | 30-45 days | |
| Application | 1055 is a medium carbon steel suitable for various type of applications where high strength is needed.It is used for components of small cross section requiring low tensile strength, and heavy forgings in the normalized condition for automotive and general engineering such as axles, clutch members, shafts, pressed and punched parts, piston rods and gear racks. | |
6: HEAT TREATMENT
ANNEALING
As mentioned above, forgings may be transferred to a furnace at a temperature that may approximate to the forging finishing temperature. The full annealing cycle of this grade is a soak at a temperature of 1450-1600oF (790-870oC) cooling to 1200oF (650oC) at 50oF (28oC) per hour, soaking and subsequently air cooling.
NORMALIZING
This steel will on occasion require normalizing prior to further heat treatment such as hardening and tempering. This is carried out at a temperature of 1650oF (900oC) followed by air cooling.
HARDENING
This steel is austenitized at 1475-1550oF (800-845oC) followed by water or oil quench depending upon section size and complexity.
TEMPERING
This steel will be tempered at a temperature to give required mechanical properties, based on past experience. It should be noted that there is a danger of temper brittleness in the temperature range of 500-600oF (260-315oC.)
7: Delivery condition
For hot forged bar, usually the delivery condition is hot forged, annealed/QT, rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed/QT, Black surface.
For Cold Drawn bar, usually the delivery condtion is cold drawn, annealed/QT, peeled/black surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed, milled/black surface
For hot forged plate, usually the delivery condition is hot forged, normalized/annealed, milled/black surface.
| GB GB/T 1299 |
JIS JIS G4404 |
DIN (W-Nr.) DIN EN ISO4957 |
AISI/ASTM ASTM A681 |
BS BS 4659 |
| Cold Work Tool Steel | ||||
| Cr12 | SKD1 | 1.2080/X210Cr12 | D3 | |
| Cr5Mo1V | SKD12 | 1.2363/X100CrMoV5 | A2/T30102 | BA2 |
| Cr12MoV | 1.2601 | D5 | ||
| Cr12Mo1V1 | SKD11 | 1.2379/X153CrMo12 | D2 | |
| X210CrW12 | SKD2 | 1.2436 | D6 | |
| 9CrWMn | SKS3 | 1.2510/100MnCrW4 | O1 | |
| 9Mn2V | 1.2842 / 90MnCrV8 | O2 | B02 | |
| 5CrNiMo | SKT4 | 1.2713 | L6/T61206 | BH224/5 |
| Hot work Tool Steel | ||||
| 1.2355/50CrMoV13-15 | S7/T41907 | |||
| 5CrNiMoV | 1.2714 | 6F3 | ||
| 5CrNi4Mo | 1.2767 | 6F7 | ||
| SKD7 | 1.2365/32CrMoV12-28 | H10/T20810 | BH10 | |
| 4Cr5MoV | SKD6 | 1.2343/X37CrMoV5-1 | H11/T20811 | BH11 |
| 4Cr5MoSiV1 | SKD61 | 1.2344/X40CrMoV5-1 | H13 | |
| SKD62 | 1.2605/X35CrWMoV5 | H12/T20812 | BH12 | |
| 3Cr2W8V | SKD5 | 1.2581 | H21 | |
| Plastic Mould Steel | ||||
| 3Cr2Mo | 1.2311 | P20 | ||
| NAK80 | 1.2312 | P20+S / P21 | ||
| 3Cr2MnNiMo | 1.2738 | P20+Ni / 718 | ||
| 4Cr13 | SUS420J2 | 1.2083 | 415 | |
| 3Cr17+S | SUS420F | 1.2085 | ||
| 3Cr17Mo | SUS420J | 1.2316 | ||
| Engineering Steel | ||||
| GB GB/T 699 |
JIS JIS G4051 |
DIN (W-Nr.) EN 10083-2 |
AISI/ASTM ASTM A20 |
EN / BS |
| 1018 | EN2C | |||
| 20 | S20C | C20/1.1151 | 1020 | EN3B /070M20 |
| S35C | C35 | 1035 | ||
| 1040 | EN8/080M40 | |||
| 45 | S45C | C45/1.1191 | 1045 | EN8D/C45E |
| 50 | S50C | 1050 | ||
| S55C | 1055 | EN9/070M55 | ||
| Q345 | S355/ST52-3/1.1170 | EN14/150M19 | ||
| GB GB/T 3077 |
JIS JIS G4105/JIS G4103 |
DIN (W-Nr.) EN 10250 |
AISI/ASTM ASTM A29 |
BS BS 970 |
| 40Cr | SCr440 | 41Cr4(1.7035) | 5140 | |
| SCM420 | 18CrMo4/1.7243 | 4118 | ||
| 30CrMo | SCM430 | 25CrMo4/1.7218 | 4130 | 708A25/708M25 |
| 42CrMo | SCM440 | 42crmo4/1.7225 | 4140 | EN19/709M40 |
| 4145 | ||||
| 4330 | ||||
| 40CrNiMoA | SNCM 439/SNCM8 | 36CrNiMo4/1.6511 | 4340 | EN24/817M40 |
| 40NiMoCr10-5/1.6745 | EN26 | |||
| 34CrNiMo6 / 1.6582 | 4337 | |||
| 30CrNiMo16-6/1.6747 | EN30B/835M30 | |||
| 32CrMo12/1.7361 | EN40B/722M24 | |||
| SCM415 | 16MnCr5 / 1.7131 | 5115 | ||
| 15CrNi6/1.5919 | 3115 | |||
| 16NiCr4/1.5714 | EN351/635M15 | |||
| 4615/4617 | EN34/665M17 | |||
| 14NiCr4/1.5752 | 3310/3415 | EN36/655M13 | ||
| 15NiCrMo16-5/1.6723 | EN39/835M15 | |||
| 18CrNiMo7-6 (1.6587) | 4815 | |||
| SNCM220 | 1.6523/21NiCrMo2 | 8620 | 805M20 | |
| 20CrNiMo5 | EN353 | |||
| GCr15 | 52100/1.3505 | EN31/535A99 | ||
| Stainless Steel | ||||
| SUS440C | X105CrMo17/1.4125 | S44004/440C | ||
| Wear-resisting Steel | ||||
| GB | JIS | DIN (W-Nr.) | AISI/ASTM | SSAB |
| NM400 | HB400 | |||
| NM500 | HB500 | |||
| Spring Steel | ||||
| GB | JIS | DIN (W-Nr.) | AISI/ASTM | SSAB |
| 65MN | 1066 | |||
| 60Si2Mn | SUP6 | 60Si7 | 9260 | |
| 60Si2MnA | SUP7 | 60Si7 | 9260 | |
| 55CrMnA | SUP9 | 55Cr3 | 5155 | |
| 60CrMnA | SUP9A | 5160 | ||
| 50CrVA | SUP10 | 51CrV4 | 6150 | |
| High Speed Steel | ||||
| GB | JIS JIS G4403 |
DIN (W-Nr.) DIN EN ISO 4957 |
AISI/ASTM ASTM A600 |
BS BS 4659 |
| SKH51 | 1.3343 | M2 | ||
| SKH55 | 1.3243/HS6-5-2-5 | M35 | ||
| SKH59 | 1.3247/HS2-9-1-8 | M42 | ||
| SKH2 | HS18-0-1/1.3355 | T1 | ||
| SKH3 | S 18-1-2-5/1.3255 | T4/T12004 | ||
| SKH4 | 1.3265/S18-1-2-10 | T5/T12005 | BT5 | |
| All kinds of forging parts according to Drawing | ||||
| Size | Round | Dia 8-1200mm |
| Plate/Flat/Block | Thickness 10mm-800mm |
|
| Width 20mm-2000mm |
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| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Delivery time | 30-45 days | |
Hunan Qilu Industrial Co., Ltd has the capacity to forge round steel, steel flat, square steel, module, shaft and roller, etc. The main specifications of the products include Φ80-1000mm forging materials and 80-1200mm square billets and which the maximum piece weight can reach 50T.
The company owns advanced special steel smelting facilities and forging processing equipments, the main steel-making equipment include 2 sets of 50t ultra-high power electric arc furnaces,2 sets of 60t LF refining furnaces,1 set of 60t vacuum degassing refining furnace and 4 sets of 1-20t electroslag re-melting furnaces.
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