What properties does steel 20xgs have?

Product marking

All steels are marked using a combination of letters and numbers. Each brand has its own purpose. At the beginning of the marking a number is indicated that indicates the carbon content in this alloy. Based on its percentage, the following types of steels are distinguished: low-carbon (less than 0.25%), medium-carbon (from 0.25% to 0.65%), high-carbon (more than 0.65%). For example, in steel grades 30ХГСН2А

and
30KhGSA

20KhGNM
steel grade contains 0.2% carbon, which makes it low-carbon.

The letters indicated in the combination indicate the content of a specific alloying element. The most common:

X-chrome;
G-manganese;
N-nickel;
C-silicon;
B – niobium;
M-molybdenum.

Sometimes the letter is followed by a number, which indicates the percentage of that element. If the number is missing, the quantity of the element does not exceed 1.5%. For example, in steel grade 25KhGSA

contains 0.25% carbon, and less than 1.5% manganese and silicon.
The letter “A” at the end of the marking indicates that the steel belongs to the category of high-quality products, and the letter “W” - to particularly high-quality products. Thus, steel grade 30ХГСН2А
is high quality.

Material 20HGSA Chelyabinsk

Not a single production can operate without steel, be it heavy engineering or the manufacture of household electrical appliances. There are many brands of this product, as well as a large number of dispensing forms. Our company sells 20KhGSA material in large quantities and with a minimal margin. To clarify the properties and characteristics of a particular brand, you can contact the company’s managers.

Like all products, 20KhGSA material is purchased from leading manufacturers. Therefore, we are ready to provide a quality guarantee with full responsibility. The minimum number of intermediaries determines the low cost. Coupled with fast delivery, this enables our business partners to conduct stable and mutually beneficial cooperation.

In addition to tempering, in the form of one or another part (blank), our company carries out metal processing. All events undergo strict control for compliance with GOST and rules. The specialists of our company carry out such work as galvanizing, creating parts according to customer drawings, producing castings, manufacturing various profiles and much more.

Having the latest equipment and vast experience in our arsenal, we can offer product testing for a number of parameters, such as strength characteristics, chemical composition, alloy purity, and so on.

Each buyer is offered a huge range of products in various formats, as well as current services and works. To quickly understand and choose a product that meets your needs, you need to contact the company manager and receive detailed information on all issues of interest.

Steel grade 20ХГНМ

Chrome-manganese-nickel steel with molybdenum grade 20ХГНМ

characterized by a content of 0.2% carbon and less than 1.5% manganese, nickel and molybdenum. In total, the amount of alloying elements is approximately 4%, which indicates that this grade belongs to the category of medium alloy steels.

As a heat treatment grade 20ХГНМ

hardening (at 860oC) and tempering (at 150 - 180oC) are used.
The hardening process is based on the recrystallization of steel when heated to a temperature above the critical temperature. Tempering is always carried out after quenching in order to increase viscosity and reduce residual stresses. Grade 20ХГНМ
is used for the production of parts that are subject to high vibration and dynamic loads.
The main mechanical properties of 20KhGNM
: impact strength - 590 kJ/m2, short-term strength - 1180-1570 MPa, yield strength for residual deformation - 930 MPa.

Classification of material and application of grade 20KhGSA

Brand:

20KhGSA
Material classification:
Alloy structural steel
Additional information about the material:
Chromium-silicon-manganese steel.
Application:
Lead screws, axles, shafts, worms and other parts operating under wear conditions and under alternating loads at temperatures up to 200 °C.

Chemical composition of material 20ХГСА in percentage terms

C	Si	Mn	Ni	S	P	Cr	Cu
0.17 — 0.23	0.9 — 1.2	0.8 — 1.1	up to 0.3	up to 0.025	up to 0.025	0.8 — 1.1	up to 0.3

Mechanical properties of 20ХГСА at a temperature of 20oC

Assortment	Size	Eg.	sв	sT	d5	y	KCU	Thermal change
—	mm	—	MPa	MPa	%	%	kJ/m2	—
Rod, GOST 4543-71	Ø-15	780	640	12	45	690	Quenching 880oC, oil, Tempering 500oC, water,

Technological properties of 20HGSA

Weldability:	no limits.
Flock Sensitivity:	not sensitive.
Tendency to temper brittleness:	inclined.

Foreign analogues of 20KhGSA

Attention! Both exact and closest analogues are indicated.

Bulgaria

Poland

BDS

Explanation of symbols, abbreviations, parameters


Mechanical properties :
sв	— Short-term strength limit, [MPa]
sT	— Proportional limit (yield strength for permanent deformation), [MPa]
d5	— Elongation at break, [%]
y	— Relative narrowing, [%]
KCU	— Impact strength, [kJ/m2]
HB	— Brinell hardness, [MPa]

Physical properties:
T	— Temperature at which these properties were obtained, [Deg]
E	— Modulus of elasticity of the first kind, [MPa]
a	— Coefficient of thermal (linear) expansion (range 20o-T), [1/degree]
l	— Thermal conductivity coefficient (heat capacity of the material), [W/(m deg)]
r	— Material density, [kg/m3]
C	— Specific heat capacity of the material (range 20o-T), [J/(kg deg)]
R	— Electrical resistivity, [Ohm m]

Weldability:
no limits	— welding is performed without heating and without subsequent heat treatment
limited weldability	— welding is possible when heated to 100-120 degrees. and subsequent heat treatment
difficult to weld	— to obtain high-quality welded joints, additional operations are required: heating to 200-300 degrees. during welding, heat treatment after welding - annealing

Steel grade 25KhGSA

Chrome-silicon-manganese steel grade 25KhGSA

is high quality, it contains 0.25% carbon, less than 1.5% manganese and silicon. The total alloying elements are less than 3%, so it is low alloyed. Its distinctive technological properties include a tendency to temper fragility and flocking. As a heat treatment, they resort to hardening (at 890oC) and tempering (at 600oC).

Delivery type 25ХГСА

- long products.
In accordance with GOST, they produce: thick sheet (GOST 11269-76), calibrated rod (GOST 8560-78), strips (GOST 103-2006), silver (GOST 14955-77). In industry, grade 25KhGSA
is used for the manufacture of stamped and welded parts, for example, worms, rods or shafts.

Chemical composition

Standard

TU 14-1-4118-2004

0.17-0.23

≤0.025

0.8-1.1

0.9-1.2

≤0.3

Remainder

≤0.3

≤0.05

≤0.03

≤0.15

≤0.2

Fe is the basis. According to GOST 4543-71, the content in especially high-quality steel is regulated: P≤0.025%; S≤0.015%; Сu≤0.25%.

Steel grade 30ХГСН2А

In steel grade 30ХГСН2А

contains 0.3% carbon, less than 1.5% manganese and silicon, about 2% nickel. In total, the number of chemical additives is approximately 5%, which indicates that the steel belongs to the medium-alloy category. At the end of the marking there is the letter “A”, which indicates that the steel is high quality. The weldability of this steel is poor (it refers to difficult-to-weld products).

Specifics of heat treatment of grade 30ХГСН2А

directly depends on the type of supply: for thick sheets, quenching and tempering are used, and for thin sheets, normalization is used.
Normalization involves heating the alloy with further cooling. Thanks to this, the mechanical properties of the product (viscosity and ductility) are significantly increased. In industry, the 30ХГСН2А
is actively used for the manufacture of flanges, rollers, wool and many other heavily loaded parts operating under pressure at temperatures from -65 to 450°C.

Mechanical characteristics

Section, mm	holiday t, °C	sТ\|s0.2, MPa	σB, MPa	d5, %	d4	d10	y, %	kJ/m2, kJ/m2	Brinell hardness, MPa
Hot rolled steel and hot rolled steel with special surface finishing
—	—	—	—	—	—	—	—	—	≤197
Calibrated and calibrated steel with special surface finish
—	—	—	—	—	—	—	—	—	≤207
Quenching in oil from 880 °C + tempering at 500 °C, cooling in water or oil
≤15	—	≥640	≥780	≥12	—	—	≥45	≥677	—
Samples. Quenching in oil from 900 °C + tempering (holding time 30 min.), air cooling
—	200	—	≥1520	≥9	—	—	≥49	≥577	≤420
Rolled sheets according to TU 14-1-4118-2004
—	—	490-690	—	≥15	≥18	—	—	—
Samples. Quenching in oil from 900 °C + tempering (holding time 30 min.), air cooling
—	300	—	≥1470	≥9	—	—	≥52	≥577	≤400
—	400	—	≥1340	≥8	—	—	≥50	≥481	≤360
—	500	—	≥1080	≥10	—	—	≥50	≥765	≤325
—	600	—	≥880	≥17	—	—	≥52	≥961	≤255

Steel grade 30KhGSA

Composed of high-quality steel grade 30KhGSA

there is 0.3% carbon, manganese and silicon less than 1.5%.
The total alloying elements are less than 3%, so it is low alloyed. 30KhGSA
brand assortment includes calibrated and ground rods, forged blanks, thin and thick sheets, strips, and pipes.

Initially, the brand was used for aviation needs, but over time it began to be in great demand in mechanical engineering. Brand 30ХГСА

is subjected to hardening and tempering, which makes it possible to create such high-strength parts as flanges, pushers, blades, wheels, shafts (operating at high temperatures).
of welding of grade 30KhGSA
can be used: arc, argon-arc, electroslag.

Steel grade 30ХМА

In heat-resistant chrome-molybdenum steel grade 30ХМА

contains 0.3% carbon and less than 1.5% molybdenum.
The total alloying elements are no more than 2%, so the steel is low-alloy. The main advantage of the 30ХМА
is the lack of tendency to temper brittleness.
For processing, hardening and tempering are used. Steel grade 30ХМА
is used for the manufacture of parts operating at high temperatures (about 400°C), for example, flanges or shafts.

See about other grades of alloy steels in this article

Structural alloy steel 20KhGSA

Brand 20ХГСА – purpose

Structural alloy chromium-silicon-manganese steel 20KhGSA is used for the manufacture of parts operating under alternating loads, under wear conditions at temperatures up to 2000C - axles, lead screws, worms, shafts, and other products.

Steel 20KhGSA - domestic analogues

Rolled metal grade	Substitute
20ХГСА	30ХГСА

Characteristics

Brand	GOST	Foreign analogues	Classification
20ХГСА	4543–71	There is	Alloy structural steel
	10702–78

Material 20KhGSA – technological properties

Flock sensitivity	Weldability	Welding methods	Tendency to temper brittleness
not sensitive	no limits	KTS, RDS, ADS (flux + shielding gas), ArDS)	inclined

Brand 20KhGSA – chemical composition

Mass fraction of elements no more than, %:

Silicon	Manganese	Nickel	Sulfur	Carbon	Phosphorus	Chromium
0,9–1,2	0,8–1,1	0,3	0,025	0,17–0,23	0,025	0,8–1,1

Steel 20KhGSA – mechanical properties

Assortment	GOST	Dimensions – thickness, diameter	Heat treatment	KCU	y	d5	sT	sв
mm	kJ/m2	%	%	MPa	MPa
Bar	4543–71	15	Hardening 8800C (oil). Vacation 5000C (water)	690	45	12	640	780

Material 20KhGSA – hardness, MPa

Assortment	GOST	HB 10-1
Bar after annealing	4543–71	207
hot rolled	10702–78	197

Brand 20ХГСА – temperature of critical points, 0С

Critical points	Ac1	Ac3	Ar1
Temperature	755	840	690

Steel – impact strength, J/cm2

Heat treatment	KCU at temperatures
Heat treatment	-500WITH	-400WITH	-200WITH	+200WITH
Normalization 8800C (air) Vacation 6500C. Hardening 8800C (oil). Holiday 580–6000С	51	64	68	80

Material 20KhGSA – physical properties

T	R 109	E 10-5	l	a 106	r	C
hail	Ohm m	MPa	W/(m deg)	1/Grad	kg/m3	J/ (kg deg)
20	7760

Brand 20KhGSA - exact and closest foreign analogues

Bulgaria	Poland
BDS	PN
20ChGSA

20HGS