FAQ
As an industry-leading steel supplier, we get asked a lot of (FAQ) frequent asked questions about steel, steel prices, the chemical composition of our metals, the alloying process and many more.
We have taken the time below to write out our most common questions, in the hope that you can find what you need there.
We also go into detail about our payment process, guarantees and shipping process to make sure everything is as clear as it can be.
If you still have questions, just email us at anytime.
Are you a manufacturer or a trading company?
We are a factory, with 16 years’ selling experience.
Where is your factory located?
Our factory is located in Dongguan city, in Guangdong Province in the South of China. There is an interactive Google map on our contact page.
Can I visit your factory? How do I get there?
Please do! We welcome our clients at all times. You can fly in to BaoAn or GuangZhou airport and we will arrange for a driver to pick you up and deliver you directly to our factory.
What are your main products?
Our main products can be broken down into the following categories, but the list is not exhaustive. Please contact us for further clarification.
Cold work steel:
- D2 / 1.2379 / SKD11,
- D3 / 1.2080 / SKD1,
- A2 / 1.2363 / SKD12,
- O1 / 1.2510 / SKS3,
- O2 / 1.2842,
- O7 / 1.2419 / SKS31
Hot work steel:
- H11 / 1.2343 / SKD6,
- H13 / 1.2344 / SKD61,
- H21 / 1.2581,
- L6 / 1.2713 / SKT4
Plastic mould steel:
- P20 / 1.2311 / 3Cr2Mo,
- P20S / 1.2312,
- 1.2083 / 420 / S136,
- NAK80,
- OT718,
- OT718H
High speed steel:
- M2 / 1.3343 / SKH9/SKH51,
- M3 / 1.3344 / SKH52,
- M35,
- M42 / 1.3247 / SKH59
Alloy steel:
- 4140 / 1.7225 / 42CrMo4 / SCM440,
- 4340 / 1.6511 / 36CrNiMo4 / SNCM439,
- 4135 / 1.7220 / SCM435 / 35CrMo.
Bearing and Gearing steel:
- E52100 / 1.3505 / 100Cr6 / GCr15,
- 20CrMnTi
Carbon steel:
- 1045 / 1.1191 / S45C / 45#,
- 1020 / 1.1151 / S20C / 20#,
- 1050 / 1.1210 / S50C /50#
How can I get a sample?
We offer free samples of our steel where available. Please contact the sales team to arrange your sample.
What are the differences between you and all the other steel companies?
When you do business with us, you are dealing directly with our steel mill, where the steel is originally produced. So our price is very competitive, our quality very high and we have full transparency.
There is no middle man, no mark up, and no delay in communication.
With 16 years of export experience, we are very experienced and can move quickly to get the exact specifications you are looking for.
We also have full English language customer service, to put you at ease and ensure precision of understanding.
What payment options do you offer?
We provide a variety of payment options for you, including:
- T/T (30% deposit, 70% on completion),
- L/C,
- D/A,
- D/P,
- Western Union,
- Money Gram,
- even O/A.
We are pleased to offer the most convenient option for our customers. Just send us an email if you have any questions.
What are our product conditions / specifications?
For heat treatment:
We can supply Annealing, Quenching + Tempering(Q+T), Normalized + Tempering (N+T), or as per customer requirements.
For surface treatment:
We can supply bright, black, coated or as per customer requirements.
Length:
Tool steel average length = 2000mm – 4000mm
Alloy structural steel average length = 3000mm – 9000mm
Carbon steel average length = 6000mm
(For shipment in 20 foot containers, we advise all cutting to be between 3000mm – 5800mm)
What are the details of your after sales service?
1) We provide the necessary technical support to all of our customers, such as material performance and heat treatment data advice.
2) We provide the appropriate steel material technical parameters for customers in Germany, The USA, Japan, Britain, and other countries.
3) If the quality of the steel material is problematic, we offer free replacement of the faulty goods.
Do you have a returns policy?
Yes. Under certain circumstances we can accept returns. Learn about our policy and process here.
How can I contact you?
We have three ways for you to contact us:
Email: jack@otaisteel.com
Tel: 0086-0769-33232622
Fax: 0086-0769-88705839
Is 4140 an alloy steel?
AISI 4140 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. 4140 steel plate has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
May I know your En19 flat bar stock sizes?
Yes we supply EN19 flat bars and plates.
Supply Size range
Hot Rolled En19 steel bar: Ø5mm-200mm
Forging En19 steel bar: Ø140mm-3000mm
Hot rolled En19 steel plate: Thickness 10mm-200mm x width 100-2300mm
Forged En19 material steel plate: Thickness 150-1500mm x Width 100 x 3000mm
We Otai stocks En19 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
How about the 4140 steel plate thicknesses that you can supply?
Yes we supply 4140 flat bars and plates.
Supply Size range
Hot Rolled 42Crmo4 steel bar: Ø5mm-200mm
Forging 42Crmo4 steel bar: Ø140mm-3000mm
Hot rolled 42Crmo4 steel plate: Thickness 10mm-200mm x width 100-2300mm
Forged 42Crmo4 material steel plate: Thickness 150-1500mm x Width 100 x 3000mm
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
May I know your 4140 flat bar stock sizes?
Yes we supply 4140 flat bars and plates.
Supply Size range
Hot Rolled 4140 steel bar: Ø5mm-200mm
Forging 4140 steel bar: Ø140mm-3000mm
Hot rolled 4140 steel plate: Thickness 10mm-200mm x width 100-2300mm
Forged 4140 material steel plate: Thickness 150-1500mm x Width 100 x 3000mm
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
Are you a supplier of 4140 plate?
Yes we supply 4140 flat bars and plates. We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
How good is alloy steel plate 4140?
On the hardenability of steel, 4140 heat treatment has good strength and good comprehensive mechanical properties, good manufacturability, high yield. The highest temperature is 427 degrees Celsius. 4140 strength, high hardenability, and good toughness, quenching deformation of small, high temperature creep rupture strength, and high.
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
Is 4140 a tool steel?
AISI 4140 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. 4140 steel plate has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is a 4140?
AISI 4140 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. 4140 steel plate has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What does AISI 4140 mean?
AISI 4140 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. 4140 steel plate has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is the difference between 4140 and 4340 steel?
AISI 4140 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. 4140 steel plate has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
More information please click here:What is the difference between 4140 and 4340 steel?
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is the difference between 4140 and 4130 steel?
AISI 4140 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. 4140 steel plate has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
More information please click here:What is the difference between 4140 and 4130 steel?
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is the difference between 4140 and 1045 steel?
AISI 4140 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. 4140 steel plate has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
More information please click here:4140 steel and 1045 steel: Which one we should choose?
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is the difference between 4140 and 8620 steel?
AISI 4140 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. 4140 steel plate has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
More information please click here:What is the difference between 4140 and 8620 steel?
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is the difference between 4140 and 5140 steel?
AISI 4140 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. 4140 steel plate has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
More information please click here:What is the difference between 4140 and 5140 steel?
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What does EN19 mean?
EN19 alloy plate steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. EN19 has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
We Otai stocks EN19 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is 4140 steel used for?
AISI 4140 alloy steel is used for manufacturing forgings with higher strength and larger tempering cross-section than 35CrMo steel, such as big gear for locomotive traction, supercharger drive gear, rear axle, connecting rod, and spring clamp with great load also can be used for drilling pipe joint and fishing tool of oil deep well below 2000m and can be used for bending machine mold, etc.
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is 42crmo4 steel used for?
AISI 42crmo4 alloy steel is used for manufacturing forgings with higher strength and larger tempering cross-section than 35CrMo steel, such as big gear for locomotive traction, supercharger drive gear, rear axle, connecting rod, and spring clamp with great load also can be used for drilling pipe joint and fishing tool of oil deep well below 2000m and can be used for bending machine mold, etc.
We Otai stocks 42crmo4 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is EN19 steel used for?
AISI EN19 alloy steel is used for manufacturing forgings with higher strength and larger tempering cross-section than 35CrMo steel, such as big gear for locomotive traction, supercharger drive gear, rear axle, connecting rod, and spring clamp with great load also can be used for drilling pipe joint and fishing tool of oil deep well below 2000m and can be used for bending machine mold, etc.
We Otai stocks EN19 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is 4140 plate mechanical properties?
On the hardenability of steel, 4140 heat treatment has good strength and good comprehensive mechanical properties, good manufacturability, high yield. The highest temperature is 427 degrees Celsius. 4140 strength, high hardenability, and good toughness, quenching deformation of small, high temperature creep rupture strength, and high. It is used for manufacturing forgings with higher strength and larger tempering cross-section than 35CrMo steel, such as big gear for locomotive traction, supercharger drive gear, rear axle, connecting rod, and spring clamp with great load also can be used for drilling pipe joint and fishing tool of oil deep well below 2000m and can be used for bending machine mold, etc.
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is 42crmo4 flat bar mechanical properties?
On the hardenability of steel, 42crmo4 heat treatment has good strength and good comprehensive mechanical properties, good manufacturability, high yield. The highest temperature is 427 degrees Celsius. 42crmo4 strength, high hardenability, and good toughness, quenching deformation of small, high temperature creep rupture strength, and high. It is used for manufacturing forgings with higher strength and larger tempering cross-section than 35CrMo steel, such as big gear for locomotive traction, supercharger drive gear, rear axle, connecting rod, and spring clamp with great load also can be used for drilling pipe joint and fishing tool of oil deep well below 2000m and can be used for bending machine mold, etc.
We Otai stocks 42crmo4 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is metric 4140 flat bar mechanical properties?
On the hardenability of steel, 4140 heat treatment has good strength and good comprehensive mechanical properties, good manufacturability, high yield. The highest temperature is 427 degrees Celsius. 4140 strength, high hardenability, and good toughness, quenching deformation of small, high temperature creep rupture strength, and high. It is used for manufacturing forgings with higher strength and larger tempering cross-section than 35CrMo steel, such as big gear for locomotive traction, supercharger drive gear, rear axle, connecting rod, and spring clamp with great load also can be used for drilling pipe joint and fishing tool of oil deep well below 2000m and can be used for bending machine mold, etc.
We Otai stocks 4140 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is en19 flat bar mechanical properties?
On the hardenability of steel, en19 heat treatment has good strength and good comprehensive mechanical properties, good manufacturability, high yield. The highest temperature is 427 degrees Celsius. 42crmo4 strength, high hardenability, and good toughness, quenching deformation of small, high temperature creep rupture strength, and high. It is used for manufacturing forgings with higher strength and larger tempering cross-section than 35CrMo steel, such as big gear for locomotive traction, supercharger drive gear, rear axle, connecting rod, and spring clamp with great load also can be used for drilling pipe joint and fishing tool of oil deep well below 2000m and can be used for bending machine mold, etc.
We Otai stocks en19 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
What is en19 steel plate mechanical properties?
On the hardenability of steel, en19 heat treatment has good strength and good comprehensive mechanical properties, good manufacturability, high yield. The highest temperature is 427 degrees Celsius. 42crmo4 strength, high hardenability, and good toughness, quenching deformation of small, high temperature creep rupture strength, and high. It is used for manufacturing forgings with higher strength and larger tempering cross-section than 35CrMo steel, such as big gear for locomotive traction, supercharger drive gear, rear axle, connecting rod, and spring clamp with great load also can be used for drilling pipe joint and fishing tool of oil deep well below 2000m and can be used for bending machine mold, etc.
We Otai stocks en19 steel plates and keep daily inventory of 10,000 tons which is hard for competitors.
