Medium Carbon Steel Seamless Tube Widely Used S40C In Mechanical
Purpose
CHARACTERISTICS
It is a steel equivalent to medium carbon steel and is a material
equivalent to semi-hard steel to hard steel. When it comes to the
amount of carbon around this range, the strength of the carbon
steel will also come out by heat treatment. Hardness and stickiness
are often proportional to half. The final specifications of steel
materials are determined by both the components that are born and
the heat treatment that is growing up.
CHEMICAL COMPOSITION(%)
| Grade | C | Si | Mn | P | S |
| S40C | 0.37-0.43 | 0.15-0.35 | 0.60-0.90 | 0.030 max | 0.035 max |
HEAT TREATMENT TEMPERATURE
| Grade | Transformation temperature
(° C) | Heat treatment temperature
(° C) |
| Ac | Ar | Normalizing | Annealing | Quenching | Tempering |
| S40C | 720-790 | 760-700 | 830 ~ 880 air-cooled | About 820 furnaces cold | 830 to 880 water cooled | 550 ~ 650 rapid cooling |
MECHANICAL PROPERTIES
| Grade | Mechanical properties |
| Heat treatment | Drop point
N / mm2 | Tensile strength
N / mm 2 | Elongation
% | Impact value
(Charpy)
J / cm 2 | Hardness
HBW |
| S40C | Normalizing | 325 min | 540 min | 22 min | - | 156-217 |
| Annealing | - | - | - | - | 131-163 |
| Quenching / tempering | 440 min | 610 min | 20 min | 88 min | 179-255 |
GRADES EQUIVALENCY
USA ASTM | China GB | England BS | France NF | Germany DIN |
| 1036, 1040 | 40Mn | 080A40 | 40M5 | 40Mn4 |
DELIVERY CONDITIONS
Non-heat treatment or heat treatment (annealing, normalizing or
tempering) state of delivery. Requirements of the state of heat
treatment delivery should be specified in the contract, did not
specify those who do not heat treatment delivery.
What we can offer?
-We offer a wide range of steel products in a wide variety of
dimensions and executions, according to the common international
specifications or customize.
-Machining and heat treatment are available.
-Also, we advise you in choosing the right materials.
Quality Assurance
Below inspection will be done in the production.
(1) ray detection---RT;
(2) ultrasonic testing---UT;
(3) Magnetic Particle Testing-MT;
(4) penetration testing-PT;
(5) eddy current flaw detection-ET
Package
In standard export packing and seaworthy material with hexagon shape bundle, covered with tarpaulin, in containers or in bulk, or
upon request
Payment & Delivery
1. Both T/T and L/C will be acceptable
2. Trade Terms: FOB, CIF, CFR
3. The delivery will be in 10-15 days if have stock; For customized
items, the delivery will be negotiated by both parties
4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples
Company Information
Shanghai Unite Steel Trading Co., Ltd
We are committed to integrate engineering steel resources in china
and serve the global engineering steel market. Our company has more
than 15 years of experience in steel researching, production,
managing and sales. And our team mostly are based on and worked in
national famous steel enterprise.
In the aspect of resources and information, we have established
cooperative and stronger relationship with nearly hundred
enterprises, either state-owned or private owned in china.
What’s more, we have built long, deep and close business
relationship with dozens of steel company, Sharing and holding
equities with several steel enterprises. Because of the close
cooperation with steel companies and our pioneering spirit, which
can ensure us stay at the top competition, and ensure our customers
get what they really want!
FAQ
Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and
trading company. We specialized in special steel which include
alloy structural steel and carbon steel and stainless steel, etc.
All material are with high quality and competitive price.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party,
such as TUV, CE, if you need. Secondly, we have a complete set of
inspection system and every process is checked by QC. Quality is
the lifeline of enterprise survival.
Q: Delivery time?
A: We have ready stock for most of material grades in our
warehouse. If the material doesn't have stock, the delivery lead
time is about 5-30 days after receiving your prepayment or firm
order.
Q: What is the payment term?
A: T/T or L/C.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you
come to China and arrange our driver to our airport to pick you up
when you come.
